Double concave lens:
Double concave lenses have a negative focal length and are typically used to increase the divergence of aggregated light.
| Diameter (mm) | 34 |
|---|---|
| Coating specifications | AR@375-415nm |
| material | H-K9L |
| Curvature R1 (mm) | 21.79 |
| Curvature R2 (mm) | 72.662 |
| Effective focal length (mm) | 32.15 |
| Center thickness Tc (mm) | 2.5 |
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