The main points of these lenses are:
Function:
Usage:
| Material | Optical Glass, Fused Silica, quartz |
| Diameter Tolerance | +0/-0.15 mm |
| Thickness Tolerance | +/-0.15 mm |
| Cler Aperture | over 90% |
| Surface Quality | 80/50~10/5 |
| Transmission | above 92% |
| Chamfer | 0.1-0.5 mm x 45° |
| Focal Length Tolerance | +/-1.5% |
| Back Focal Length Tolerance | +/-1.5% |
| Coating | available |
| Usage | optical system, photographic sysem, Lighting system e.g. laser, camera, projector, magnifier etc. |


