Filters Used for Space, Satellite, and Astronomy

With their outstanding transmission characteristics and uniformity, coupled with their innate durability and dependability, Iridian’s standard telecom filters are the filters of choice in earth-lunar communication. The filters have been employed in NASA’s Lunar Laser Communication Demonstration (LLCD), linked to the LADEE (Lunar Atmosphere and Dust Environment Explorer) project.

Satellite Instrumentation

Iridian has developed and produced filters, as well as providing optical component coatings for numerous low-earth orbit instruments and satellites.

Examples of Iridian’s filters for both earth and stellar observation applications have included:

  • 2-10 nm bandpass filters which have been used by NASA for remote sensing applications around the globe.
  • A multi-spectral array of 10 bandpass filters ranging from 3 um to 13 um (developed via subcontract from ABB Canada, for the Canadian Space Agency’s Space Technology Development Program).

Filters Used for Space, Satellite, and Astronomy

  • 532/1550 nm partial reflectors and AR coatings developed for Fabry-Perot etalons and used on NASA’s ICESat-2 satellite.
  • Extremely narrow-band, large format filters for imaging lightning.

Filters Used for Space, Satellite, and Astronomy

  • AR coatings developed for use on NASA’s Solar Dynamics Observatory (SDO).
  • Coated components (such as Michelson interferometers), currently in use or scheduled to go into space.

Astronomy

Iridian has delivered custom filters for astronomical observations, possessing sizes as large as 200 mm x 170 mm. One example was the multi-peak filter used by the John Hopkin’s University group for an investigation into the accelerating expansion of the universe for the detection of Type 1A supernova.

Filters Used for Space, Satellite, and Astronomy

ISS Light Absorbers

Equipment used in harsh settings like outer space should be accurate enough for the purposes of science, while retaining a sufficient level of durability. Iridian is proud to supply high performance, dependable light-absorbing (‘black absorbers’) thin film filters to the Canadian Space Agency. These light absorbers have been utilized on the International Space Station (ISS), as well as on satellites launched by the Space Shuttle.

Light absorbers from Iridian, specifically designed for space applications, make use of hard dielectric coatings and are able to deliver a high contrast surface when compared against the highly reflecting white surfaces used on the space station or satellites. Iridian’s light absorbers can be designed and manufactured for narrow or broad wavelengths, ranging between 400-2200 nm, making them ideal for use in space and other harsh environments.

This information has been sourced, reviewed and adapted from materials provided by Iridian Spectral Technologies.

For more information on this source, please visit Iridian Spectral Technologies.

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