{"title":"Continuously Variable Neutral Density Filter (CVND)","description":"\u003cp\u003eBrowse 18+ optical filters from WaveQuanta's catalog. Part of our precision optical components and lenses range. Detailed specifications, datasheets, and 3D models available for each product. Request a quote today.\u003c\/p\u003e","products":[{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-100c-6m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-100C-6M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-100C-6M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518881153178,"sku":"NDFR-100C-6M","price":1027.15,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_5755cd81-0bbc-4a28-8c0c-5ab25d8064bf.jpg?v=1772680429"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-100c-4m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-100C-4M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-100C-4M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518883250330,"sku":"NDFR-100C-4M","price":898.47,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_224389aa-a6b2-4dc8-aa9c-9df4f8602cbf.jpg?v=1772680434"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-100c-2m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-100C-2M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-100C-2M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518885281946,"sku":"NDFR-100C-2M","price":898.47,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_85448a77-645b-46b7-9eac-e6a4337d7a90.jpg?v=1772680439"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-50c-6m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-50C-6M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-50C-6M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518887674010,"sku":"NDFR-50C-6M","price":764.04,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_5c08ed93-8aa3-4d5e-b842-110e8c52ecd4.jpg?v=1772680445"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-50c-4m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-50C-4M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-50C-4M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518889836698,"sku":"NDFR-50C-4M","price":654.16,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_605b1835-6ae0-41ab-9460-361a846ecc50.jpg?v=1772680451"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-50c-2m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-50C-2M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-50C-2M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518891442330,"sku":"NDFR-50C-2M","price":654.16,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_2a184730-5eb8-4c87-aa26-e0da6693f939.jpg?v=1772680455"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-25c-6m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-25C-6M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-25C-6M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518893080730,"sku":"NDFR-25C-6M","price":671.82,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_265f7928-2a58-47a1-b231-470b5438d254.jpg?v=1772680461"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-25c-4m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-25C-4M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-25C-4M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518895046810,"sku":"NDFR-25C-4M","price":612.31,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_d02271ec-6d1c-47ca-b92a-916fc764117c.jpg?v=1772680466"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-25c-2m","title":"Continuously Variable Neutral Density Filters, Mounted NDFR-25C-2M","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters, Mounted — Model NDFR-25C-2M\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters, Mounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003cli\u003eMounted in scaled mechanical housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Mounted Continuously Variable Neutral Density Filter features mechanical housing with angular scales and a rotation axis. The mount is precision-designed to minimize the impact on the optical element's clear aperture. The side with the scale is the coated surface, and for optimal performance, it is recommended to have light incident from this side.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518897471642,"sku":"NDFR-25C-2M","price":612.31,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/3-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87_EF_BC_8C_E5_B7_B2_E5_AE_89_E8_A3_85-FkL2WJ5-Jj9AK7QZBchZvaXI86Ag_48ea267a-c8f4-4295-a5cc-fecf1a2f4602.jpg?v=1772680472"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-100c-6","title":"Continuously Variable Neutral Density Filters NDFR-100C-6","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-100C-6\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518899470490,"sku":"NDFR-100C-6","price":727.22,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_21a54fde-5646-4140-845e-488f4b5afbb9.jpg?v=1772680476"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-50c-6","title":"Continuously Variable Neutral Density Filters NDFR-50C-6","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-50C-6\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518901174426,"sku":"NDFR-50C-6","price":619.01,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_4b18aabf-db86-4022-9a4e-05fcba809f65.jpg?v=1772680482"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-25c-6","title":"Continuously Variable Neutral Density Filters NDFR-25C-6","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-25C-6\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518902911130,"sku":"NDFR-25C-6","price":546.12,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_62fd96b2-98d1-41c5-a6d8-9d07c4140053.jpg?v=1772680487"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-100c-4","title":"Continuously Variable Neutral Density Filters NDFR-100C-4","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-100C-4\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518904975514,"sku":"NDFR-100C-4","price":578.09,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_3f903acf-1f58-466d-87bd-effeed6c9e44.jpg?v=1772680492"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-100c-2","title":"Continuously Variable Neutral Density Filters NDFR-100C-2","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-100C-2\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518906515610,"sku":"NDFR-100C-2","price":578.09,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_56e3bb41-22a1-42f2-9d08-368af3bf0e3d.jpg?v=1772680498"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-50c-4","title":"Continuously Variable Neutral Density Filters NDFR-50C-4","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-50C-4\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518908973210,"sku":"NDFR-50C-4","price":507.8,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_80f27838-b34c-4d95-9f2f-9376e21dbfec.jpg?v=1772680503"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-50c-2","title":"Continuously Variable Neutral Density Filters NDFR-50C-2","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-50C-2\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518911463578,"sku":"NDFR-50C-2","price":507.8,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_5f4db7cf-06fd-47b2-9fe1-1f4f6bba826d.jpg?v=1772680509"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-25c-4","title":"Continuously Variable Neutral Density Filters NDFR-25C-4","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-25C-4\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518913986714,"sku":"NDFR-25C-4","price":473.42,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_68693a58-a22d-475e-8a1b-0ef33206d5aa.jpg?v=1772680514"},{"product_id":"continuously-variable-neutral-density-filter-cvnd-ndfr-25c-2","title":"Continuously Variable Neutral Density Filters NDFR-25C-2","description":"\u003ch2\u003eContinuously Variable Neutral Density Filters — Model NDFR-25C-2\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eContinuously Variable Neutral Density Filters\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe OD value can be adjusted by rotating the filter angle\u003c\/li\u003e\n\u003cli\u003eCircular shape with continuously adjustable OD value\u003c\/li\u003e\n\u003cli\u003eSuitable for working wavelength range of 240-1200 nm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuous Variable Neutral Density Filters provide linearly adjustable attenuation by rotating the coated area. The structure consists of UV fused silica substrate and a 270° metal (Inconel) coating. The OD value increases linearly in a counterclockwise direction at different angles. This design is suitable for a wavelength range of 240-1200 nm.  \n\nThe OD value range of the continuous variable neutral density filters is 0.04-2.0, 0.04-4.0, or 0.04-6.0. There is a linear relationship between the OD value and the angle θ, satisfying OD = k * θ, where k is 0.0073, 0.0147, and 0.0221, respectively. The available diameters are currently Ø25 mm, Ø50 mm, and Ø100 mm.  \n\nIn addition to standard continuous variable neutral density filters, LBTEK also offers various customization services. For specific customization requirements, please contact LBTEK Technical Support.\u003c\/p\u003e\n\u003ch3\u003eContinuously Variable Neutral Density Filters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOD range: 0.04-2.0, 0.04-4.0, 0.04-6.0\u003c\/li\u003e\n\u003cli\u003eCoating: Inconel\u003c\/li\u003e\n\u003cli\u003eSize: Ø25 mm, Ø50 mm or Ø100 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Continuously Variable Neutral Density Filters are composed of UV-grade fused silica substrates and a full 270° metal (Inconel) coating, designed for a transmission wavelength range of 240-1200 nm. The central aperture diameter of the continuous neutral density filters is uniformly 7.5 mm, facilitating mechanical mounting, and the OD value can be adjusted by rotation. Although classified as reflective neutral density filters, the Inconel coating still absorbs a portion of the incident light. To ensure optimal performance, it is recommended that incident light enters from the side coated with Inconel. Additionally, caution should be taken to avoid contact with this unprotected metal coating, as touching may scratch the unprotected surface. For cleaning, the use of an air blower is recommended.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47518916116634,"sku":"NDFR-25C-2","price":473.42,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_b5ca3af6-aafd-4c22-b4df-e828e6d7b9c9.jpg?v=1772680519"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/collections\/1-1_E8_BF_9E_E7_BB_AD_E5_9E_8B_E4_B8_AD_E6_80_A7_E5_AF_86_E5_BA_A6_E6_BB_A4_E5_85_89_E7_89_87-FjvCjLYLKc0RC2kSu4RdVOdKGEE5_56e3bb41-22a1-42f2-9d08-368af3bf0e3d.jpg?v=1777788469","url":"https:\/\/waveqvanta.com\/collections\/lbtek-optics-l4-continuously-variable-neutral-density-filter-cvnd.oembed","provider":"WaveQuanta","version":"1.0","type":"link"}