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| Equi-Concave Lenses |
Optical Component > Precision
Optics > Lenses |
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| This kind of lens with different or equal radius of
curvature on both surfaces, diverges collimated incident light,
and forms only virtual images that are seen through the lens. It
is often used to expand light beams or to increase focal length
in existing systems. |
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| Specifications |
| Dimensions Tolerance |
+0.0/-0.15mm |
| Paraxial Focal Length Tolerance |
¡À2% |
| Centration Tolerance |
3 arc minutes |
| Clear Aperture |
90% |
| Surface Quality |
60/40 |
| Bevel |
0.25mm at 45 deg |
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