Plano Concave lenses have one flat and one inward curved surface. Plano Concave lenses have a negative focal length and are used for
image reduction or to spread light.
Diameter Tolerance | +0.0/-0.05mm |
Center Thickness Tolerance | ±0.02 mm |
Focal Length Tolerance | ±2% |
Surface Quality | 60/40, 40/20 or better |
Material | BK7, UVFused silica, Ge,Si,CaF2, ZnSe, |
Clear Aperture | >90% |
Centering | <3 arc min |
Coating | Custom |
Bevel | Protective bevel as needed |