Band-Opitcs has a professional engineering team with more than 25 years of experience in the optical industry, and has been engaged in the development and manufacturing of optical filters for a long time. We can provide a variety of forms of filters: circular filters, square filters, special-shaped filters. Our CNC and laser cutting equipment can do complex shape processing of products.
The kinds of filters include:
Eccentric spectroscopic filters
Depolarizing filters
Fluorescent filters
Long-pass filter
Short-pass filter
Face recognition filters
Enzyme label filter
Astronomical observation filter
UV filter
Color sorting filter
Belows are the precision requirements that we can provide for filters:
| Standard | Precision grade | Factory standard | Commercial grade |
| Dimensional tolerance | +/-0.02mm | +/-0.05mm | +/-0.1mm |
| Thickness tolerance | +/-0.02mm | +/-0.05mm | +/-0.1mm |
| Radius | Infinity |
| Flatness | PV<1/10L | PV<1/2L | PV<1L |
| Surface quality | 20-10 | 40-20 | 60-40 |
| Roughness | RMS<1nm | RMS<2nm | RMS<5nm |
| Parallelism | <10arcsec | <30arcsec | <3arcmin |
| Chamfer | <0.05mm x 45deg | <0.15mm x 45deg | <0.3mm x 45deg |
| Coating | Filter coating |
