double concave optical glass lens
double concave optical glass lens
Product description:
double concave optical glass lens
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Double concave lens is the most common form of Negative lens. Negative lens is most suited to producing diverging light or a virtual image, where the input light is converging. |
Specifications:
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Material: |
BK7, Fused Silica, SF10, CaF2, Sapphire .etc. |
| Paraxial Focal Length Tolerance: | ±2% |
| Dimension Tolerance: | ±0.2(General). ±0.05(High Precision) |
| Centration: | <3 arc min |
| IRR: | λ/4@633nm(General),λ/10@633nm(High Precision) |
| Clear Aperture: | >80%(Small Size), >95%(Large Size) |
| Surface Figure | <1.5λ@633nm(General),<λ/4@633nm(High Precision) |
| Surface Quality: | 60/40(General),10/5(High Precision) |
| Bevel: | <0.25mm |
| Coating: | Uncoated, AR,PR, HR, etc. |
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