Meniscus lens is divided into positive and negative lunar lenses.One side of a meniscus lens is convex and the other side is concave. It can be a convergent lens or a divergent lens, determined by the refractive index, curvature, and radius together. Widely used in photography systems, projection systems, imaging systems, optical viewfinder, and laser measurement systems.
Product parameter
| Materials | Optical glass, quartz, infrared materials (calcium fluoride, zinc selenide, silicon, germanium) |
| Diameter Range | φ1-450mm |
| Contour tolerance | 0/-0.1 |
| Thickness Tolerance | ±0.03 |
| Surface Quality | 20-10 |
| Surface Flatness | N≤1, △N≤0.2 |
| Center | 15 seconds |
| Chamfer | ≤0.1 |
| Clear Aperture | > 90% |
| Coating | According to customer requirements |
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