Plano-Concave Lens
It has a negative focal length and is used to diverge a collimated beam. A plano-concave lens has one spherical surface and one flat surface, and is thinner at the center than at the edges.
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Product Description
It has a negative focal length and is used to diverge a collimated beam. A plano-concave lens has one spherical surface and one flat surface, and is thinner at the center than at the edges.
| Project | Performance Parameters | High Precision |
| Material | BK7, UV fused silica, 7980 OF | |
| Specifications | D4, D6, D7.98 | |
| Dimension Tolerance | ±0.1 mm | ±0.02 mm |
| Focal Length Tolerance | ±1% | ±0.5% |
| Centration | < 3 arcmin | < 1 arcmin |
| Flatness (within clear aperture) | λ/4 | λ/8 |
| Surface Quality | 20-10 | 10-5 |
| Edge Chip | < 0.2 | < 0.05 |
| Bevel | 0.1~0.5×45° | |
| Coating | 532 nm, 850 nm, 1064 nm, 1260–1650 nm (customizable) | |
