Description
Bandpass filters are used for optical band limiting, i.e. for separating an explicit section of the wavelengths of a light beam. These partial frequencies of the light beam should be transmitted in as high a proportion as possible, while the filter is impermeable to the remaining part. With bandpass filters, the bandwidth, the proportion of transmission from the center frequency and the degree of impermeability of the cut-off frequencies are very important. In the end, these largely determine the price. In most cases, dielectric coatings are used on a glass substrate to achieve the optical properties, but sometimes absorbing glass is also used
Application areas
Industrial laser engraving and cutting
Medical laser devices
Optical metrology
Scientific research
Order information
Our lenses are manufactured according to your specific requirements. Contact us for a customized offer. Please let us know the exact specifications and requirements.
Parts for filtering a specific range of the optical spectrum.
| Feature | Value |
|---|---|
| Types | Band-pass, long-pass, short-pass, ND filters, dichroic |
| Materials | Quartz glass, BK7, optical glass |
| Wavelength range | 200 nm - 5000 nm |
| Transmission | > 90 % in the desired range |
| Blocking | OD3 - OD6 outside the passage area |
| Surface accuracy | < λ/4 bei 632,8 nm |
| Coatings | Multilayer dielectric, metal, AR |
