optical lens

Description

FOCtek provides spheric lens, aspheric lens, cylindrical lens and achromatic lens with a wide range of sizes and materials including BK7, Fused Silica, SF5, Sapphire, CaF2, Silicon, Germanium, ZnSe, ZnS, etc. Spheric Lens Our spheric lenses include Plano-Convex Lens, Plano-Concave Lens, Double-Convex Lens, Double-Concave Lens, Positive-Meniscus Lens, Negative-Meniscus Lens. Material: BK7, K9, Fused Silica, SF*0, Silicon, CaF2, Sapphire etc. Typical Diameter (Фmm): *0.0, *2.7, *5.0, *0.0, *5.4, *0.0, *0.8, etc. Diameter Tolerance (mm): *0.0/*0.2 (General), *0.0/*0.*2 (High Precision) Paraxial Focal Length Tolerance (mm): ±2% Centration: <3 arc min Clear Aperture: >*0% (Small Size), >*5% (Large Size) Surface Figure (per *****): <1.5λ, (General), <λ/4 (High Precision) IRR (@********************;»/4 (General), <λ/*0 (High Precision) Surface Quality: *0/*0 (General), *0/5 (High Precision) Bevel (face width x **0): <0.*5mm Coating: uncoated, AR, HR, PR Coating, etc. Achromatic Lens Design: Wavelength unpon request Diameter Tolerance (mm): *0.0/*0.2 (General), *0.0/*0.*2 (High Precision) Paraxial Focal Length Tolerance (mm): ±2% Centration: <3 arc min Clear Aperture: >*0% (Small Size), >*5% (Large Size) Surface Figure (per *****): <1.5λ, (General), <λ/4 (High Precision) IRR (