{"title":"Double-concave lens, N-SF11, AR coating: 400 nm-700 nm","description":"\u003cp\u003eBrowse 2+ lbtek - double-concave lens, n-sf11, ar coating: 400 nm-700 nm 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":"double-concave-lens-n-sf11-ar-coating-400-nm-700-nm-mbcc30605-a","title":"Double-concave lens, N-SF11, AR coating: 400 nm-700 nm MBCC30605-A","description":"\u003ch2\u003eDouble-concave lens, N-SF11, AR coating: 400 nm-700 nm — Model MBCC30605-A\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eOperating wavelength 400 nm-700 nm, focal length -25.0 mm, Ø25.4 mm, substrate N-SF11.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOptical Material: N-SF11\u003c\/li\u003e\n\u003cli\u003eOperating Wavelength: 400 nm-700 nm (AR Coating)\u003c\/li\u003e\n\u003cli\u003eApplication: Imaging, Beam Expansion or Reduction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Double-Concave Lenses feature two concave surfaces with equal radii of curvature, providing a negative focal length. They are commonly used for beam collimation, focal length adjustment, and image reduction or magnification. To meet different application requirements, LBTEK offers double-concave lenses made from both N-SF11 and N-BK7 glass. N-SF11 lenses, with a lower Abbe number, exhibit higher dispersion than N-BK7, making them ideal for shorter focal length designs and for use in harsh environments such as acidic or alkaline conditions. N-BK7 lenses, by contrast, are among the most widely used materials for high-quality optics, offering excellent transmission in the visible and near-infrared regions and making them suitable for a broad range of general-purpose applications. LBTEK provides both uncoated double-concave lenses and AR-coated versions optimized for 400–700 nm, 700–1100 nm, and 1100–1650 nm. All lenses are manufactured with precision and undergo strict quality control, ensuring that LBTEK delivers high-performance optical components at competitive prices.\u003c\/p\u003e\n\u003ch3\u003eDouble-concave lens, N-SF11, AR coating: 400 nm-700 nm\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate Material: N-SF11\u003c\/li\u003e\n\u003cli\u003eOperating Wavelength: 400 nm-700 nm (AR Coating)\u003c\/li\u003e\n\u003cli\u003eApplication: Imaging, Beam Expansion or Reduction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK biconcave lenses have a negative focal length and are commonly used in applications such as imaging or beam collimation. Since N-SF11 has a lower Abbe number, LBTEK chooses to use RoHS-certified N-SF11 to manufacture lenses with various smaller focal lengths. Additionally, N-SF11 lenses are more suitable for particularly harsh (acidic or alkaline) environments. All circular lenses from LBTEK come pre-installed with standard lens sleeves or lens mounting adapters. These mechanical components are engraved with product model, type, diameter, and focal length on the housing for easy identification.\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47517912563866,"sku":"MBCC30605-A","price":65.08,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/1-1_E5_8F_8C_E5_87_B9_E9_80_8F_E9_95_9C_EF_BC_8CN-SF11_EF_BC_8C_E5_A2_9E_E9_80_8F_E8_86_9C_EF_BC_9A400_20nm-700_20nm-FqmwGqTxib8SBbTnveivZB9ajgG0.jpg?v=1772671126"},{"product_id":"double-concave-lens-n-sf11-ar-coating-400-nm-700-nm-bcc30605-a","title":"Double-concave lens, N-SF11, AR coating: 400 nm-700 nm, unmounted BCC30605-A","description":"\u003ch2\u003eDouble-concave lens, N-SF11, AR coating: 400 nm-700 nm, unmounted — Model BCC30605-A\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eOperating wavelength 400 nm-700 nm, focal length -25.0 mm, Ø25.4 mm, substrate N-SF11.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOptical Material: N-SF11\u003c\/li\u003e\n\u003cli\u003eOperating Wavelength: 400 nm-700 nm (AR Coating)\u003c\/li\u003e\n\u003cli\u003eApplication: Imaging, Beam Expansion or Reduction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLBTEK Double-Concave Lenses feature two concave surfaces with equal radii of curvature, providing a negative focal length. They are commonly used for beam collimation, focal length adjustment, and image reduction or magnification. To meet different application requirements, LBTEK offers double-concave lenses made from both N-SF11 and N-BK7 glass. N-SF11 lenses, with a lower Abbe number, exhibit higher dispersion than N-BK7, making them ideal for shorter focal length designs and for use in harsh environments such as acidic or alkaline conditions. N-BK7 lenses, by contrast, are among the most widely used materials for high-quality optics, offering excellent transmission in the visible and near-infrared regions and making them suitable for a broad range of general-purpose applications. LBTEK provides both uncoated double-concave lenses and AR-coated versions optimized for 400–700 nm, 700–1100 nm, and 1100–1650 nm. All lenses are manufactured with precision and undergo strict quality control, ensuring that LBTEK delivers high-performance optical components at competitive prices.\u003c\/p\u003e\n\u003ch3\u003eDouble-concave lens, N-SF11, AR coating: 400 nm-700 nm, unmounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate Material: N-SF11\u003c\/li\u003e\n\u003cli\u003eOperating Wavelength: 400 nm-700 nm (AR Coating)\u003c\/li\u003e\n\u003cli\u003eApplication: Imaging, Beam Expansion or Reduction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAddress：Building A6, Huanchuang Enterprise Plaza, Yuelu Idstrict, Changsha\u003c\/p\u003e","brand":"WaveQuanta","offers":[{"title":"Default Title","offer_id":47517912629402,"sku":"BCC30605-A","price":59.69,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/2-1_E5_8F_8C_E5_87_B9_E9_80_8F_E9_95_9C_EF_BC_8CN-SF11_EF_BC_8C_E5_A2_9E_E9_80_8F_E8_86_9C_EF_BC_9A400_20nm-700_20nm_EF_BC_8C_E6_9C_AA_E5_AE_89_E8_A3_85-Flmqp_ck8VFlMiHJRNLxskDTVBvT.jpg?v=1772671131"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/collections\/2-1_E5_8F_8C_E5_87_B9_E9_80_8F_E9_95_9C_EF_BC_8CN-SF11_EF_BC_8C_E5_A2_9E_E9_80_8F_E8_86_9C_EF_BC_9A400_20nm-700_20nm_EF_BC_8C_E6_9C_AA_E5_AE_89_E8_A3_85-Flmqp_ck8VFlMiHJRNLxskDTVBvT.jpg?v=1777788471","url":"https:\/\/waveqvanta.com\/collections\/lbtek-optics-l4-double-concave-lens-n-sf11-ar-coating-400-nm-700-nm.oembed","provider":"WaveQuanta","version":"1.0","type":"link"}