Double-Concave Lenses Product
Double-Concave Lenses are used in beam expansion, image reduction, or light projection applications. These lenses are also ideal for expanding the focal length of an optical system. Double-Concave Lenses, which have two concave surfaces, are Optical Lenses with negative focal lengths.
|
Diameter Tolerance |
±0.02 mm |
|
Center Thickness Tolerance |
±0.02 mm |
|
Focal Length Tolerance |
±2% |
|
Surface Quality |
10/20 or better |
|
Material |
BK7, UVFused silica, Ge,Si,CaF2, ZnSe,etc |
|
Clear Aperture |
>90% |
|
Centering |
<1 arc min |
|
Coating |
Custom |
|
Bevel |
Protective bevel as needed |
