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| All concave lenses diverge light, fused silica concave lenses are particularly useful for the UV region. Good quality BK7 glass concave lenses are used to diverge light or sometimes to correct the image position in an optical system. Plano Concave lenses have a negative focal length and the spherical
aberration introduced into the wavefront by a plano concave lens
is negative. As a result, it can be used to balance the positive
spherical aberration introduced by other lenses. |
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This is the general standards we offer our customers, UNION OPTICS can supply other lenses meet your requirements, for detail information, please contact us. |
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| Plano Concave Lens | ||
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| Material: | BK7, Fused Silica | |
| Dimension Tolerance: | +0/-0.1mm | |
| Thickness Tolerance: | ±0.1mm | |
| Surface Quality: | 40/20 scratch and dig | |
| Flatness: | λ/4@632.8nm | |
| Centration: | <3 arc min | |
| Focal Length Tolerance: | ±1% | |
| Clear Aperture: | >90% | |
| Bevel: | 0.2mmX45deg | |
| Coating: | As requested | |
Plano Convex lens  BiConvex lens |
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| Note: Usually, the material we used is Chinese material unless assigned. If you can not confirm which material is the right one, please contact us. | ||