Filters
Optical filters attenuate particular wavelengths or frequencies while passing others with relatively no change and selectively transmitting light of different wavelengths. They are usually implemented as a glass plane or plastic device in the optical path, which are either dyed in the bulk or have interference coatings.
Part of our wide choice of quality products are various high-end optical filters.
Utilizing the advanced Helios Coating machines and technology makes us one of the biggest suppliers for optical filters in Asia.
We are especially proud of one of our leading products: The spatial Multiband Filter series.
Alongside that we also offer various other filter types and series, such as cut-off filter, band pass filter, notch filter, neutral filters – made from various materials including common glass, colored glass, fused silica and sapphire.
Typical Accuracy
| Category | cut-off filter，band pass filter，notch filter，neutral filter |
| Substrate material | Common glass，colored glass，fused silica，sapphire |
| Max diameter | 200mm |
| Min band width | 5nm |
| Wavelength accuracy | ±0.5% central wavelength |
| Transmission @ pass band | 95% |
| Block depth | > OD6 |
| Transition band steepness | 2% central wavelength |
- High transmission at pass band and OD at block band
- High spectral isolation by nearly rectangular pass band
- High durability for high output lamps lasers & LEDs
- ROHS compliant
- High transmission at pass band and OD at block band
- High S/N and spectral isolation by nearly rectangular pass band
- Bandpass or notch filter
- High stability without fading or aging**High positioning accuracy for coating, mask and reticle**High durability and extremely low emission rate mask
