- Custom order-sorting filters designed to meet customer requirements:
- Block filters
- Patterned filters
- Absorbing filters
- Linearly Variable Filters
Block filters provide a butcher-block array of multiple filters in a single assembly (see photo above). Complex and miniature arrays are possible, and can also be provided in circular mounting and filter wheels.
Patterned filters provide an array of multiple filters coated in a pattern on a single substrate, allowing optimal miniaturization and integration with image sensors, and eliminating component assembly.
Absorbing coatings are particularly useful in reducing reflected light and signal interference within an optical system using order sorting. Omega is developing filters using new high index dielectric materials which provide high absorption and dramatically reduced reflections in the visible and NIR regions.
Linear Variable Filters
Linearly variable filters provide continuous spectral variation in wavelength or bandwidth across one linear direction of the filter. These can be produced in bandpass, longpass or shortpass configurations with spectral gradients up to 50 nm/mm along the length of the part.