Double-Concave (DCV) Lenses have two inward curved surfaces and a negative focal length. They are used for image reduction and to spread light.
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Diameter Tolerance | ±0.02mm |
Center Thickness Tolerance | ±0.02mm |
Focal Length Tolerance | ±1% |
Surface Quality | 20/10 or better.. |
Material | BK7, UVFused silica, Ge,CaF2, ZnSe |
Clear Aperture | >90% |
Centering | ±30 arc seconds |
Coating | Custom |
Bevel | Protective bevel as needed |