{"product_id":"negative-meniscus-lens-n-bk7-ar-coating-400-nm-700-nm-mp10623-a","title":"Negative Meniscus Lens, N-BK7, AR Coating: 400 nm-700 nm, Unmounted MP10623-A","description":"\u003ch2\u003eNegative Meniscus Lens, N-BK7, AR Coating: 400 nm-700 nm, Unmounted — Model MP10623-A\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eOperating wavelength 400 nm-700 nm, focal length -1000.0 mm, Ø25.4 mm, substrate N-BK7.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOptical Material: N-BK7;\u003c\/li\u003e\n\u003cli\u003eOperating Wavelength: 400 nm-700 nm (AR Coating);\u003c\/li\u003e\n\u003cli\u003eApplication: imaging, beam expander or reducer, convergence;\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe negative meniscus lens from LBTEK consists of two surfaces with similar radii of curvature (the concave surface having a smaller radius than the convex surface), resulting in a negative focal length. Typically used for beam expansion\/reduction, focal length extension, or numerical aperture reduction, this lens minimizes spherical aberration when the convex surface faces incident light during beam expansion\/collimation or divergent light applications, while the concave surface should face incident light for converging beam collimation. Both surfaces are coated with 400-700 nm AR coatings to reduce surface reflectivity. While N-BK7 is the most common lens material for visible light and near-infrared applications, LBTEK manufactures these lenses using both N-SF11 and N-BK7 materials for diverse optical requirements. All lenses undergo precision machining and strict quality control, ensuring LBTEK delivers high-quality optical products at competitive prices.\u003c\/p\u003e\n\u003ch3\u003eNegative Meniscus Lens, N-BK7, AR Coating: 400 nm-700 nm, Unmounted\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate Material: N-BK7\u003c\/li\u003e\n\u003cli\u003eOperating Wavelength: 400 nm-700 nm\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":47518088560794,"sku":"MP10623-A","price":42.02,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/6156\/3546\/files\/2-1_E8_B4_9F_E5_BC_AF_E6_9C_88_E9_80_8F_E9_95_9C_EF_BC_8CN-BK7_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-FgjklEyK-ZtWlXcw06cDmL.jpg?v=1772677147","url":"https:\/\/waveqvanta.com\/products\/negative-meniscus-lens-n-bk7-ar-coating-400-nm-700-nm-mp10623-a","provider":"WaveQuanta","version":"1.0","type":"link"}