In astronomical observations, optical filters are able to provide the wavelength selectivity needed to enable telescopes to discriminate signal from background information. These filters often require larger sizes, higher uniformity, and excellent surface quality and surface figure.
Iridian Spectral has designed and manufactured filters and provided coatings on optical components for satellite and low-earth orbit earth observation instruments and for earth-to-orbit (or beyond) optical communications.
Iridian Spectral offers a variety of filters for these earth and stellar observation and communications applications including:
- Multi-Zone Filters – These filters can offer spatially varying spectral performance on a single substrate. They feature wavelength ranges from UV (300 nm) to LWIR (10 um) and are customizable in size, spectral performance, layout and filter types.
- The 532/1550 nm partial reflectors and AR coatings for Fabry-Perot etalons used on NASA’s ICESat-2 satellite.
- AR coatings for use on NASA’s Solar Dynamics Observatory (SDO)
- 2-10 nm band pass filters used by NASA for remote sensing applications
- Very narrow-band, large format filters for imaging lightning
- Coated components (i.e., Michelson interferometers) used or currently scheduled to go into space
- Filters for NASA’s Lunar Laser Communications Demonstration LLLCD free space communications test
For more in-depth information on available Iridian Spectral optical filters for earth and stellar observation, download the available brochures.