In the realm of optical systems, BK7 optical glass cemented achromatic doublet convex lenses have proven to be a vital component. These lenses are designed to provide high-quality imaging and accurate results.
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| Name | optical glass |
| Material | Bk-7,Pyrex,Fused Silica,Sapphire,quartz |
| Diameter Tolerance | +0/-0.2 mm |
| Thickness Tolerance | +/-0.2 mm |
| Cler Aperture | over 90% |
| Surface Quality | 80/50~10/5 scratch and dig |
| Transmission | above 92% |
| Chamfer | 0.1-0.3 mm x 45 degree |
| Focal Length Tolerance | +/-2% |
| Back Focal Length Tolerance | +/-2% |
| Coating | available |
| Usage | opticl system, photographic sysem, Lighting system,Electronic apparatuse.g.laser,camera,monitor,projector,magnifier,telescope, polarizer, electronic instrument,led etc. |


