| Material | BK7, Borosilicate, Fused Silica, Sapphire, CaF2, ZnSe, Ruby |
|---|---|
| Diameter | 0.5-10mm |
| Surface quality | 40/20, 20/10, 10/5 |
| Radius of curvature | R0.5-300 |
| Dia tolerace | 0.01, 0.001 |
| Centration | 3 arc min |
| Ceter thickness tolerance | ±0.01, ±0.1 |
| Clear aperture | 50%-60% |
Glass ball lenses are widely used for coupling fiber and semiconductor lasers, or photodetectors. It’s much smaller than a normal lens, and it’s completely polished, so be careful when using it. But it can reduce the size and weight of the device. With a positive focal length, used at the unit conjugate point, can eliminate all kinds of aberration.
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