Cooled infrared filters and dichroics for the sea and land surface temperature radiometer

  • Gary Hawkins, Richard Sherwood, Karim Djotni, Peter Coppo, Holger Höhnemann, Fabio Belli
  • Applied Optics, March 2013, Optical Society of America (OSA)
  • DOI: 10.1364/ao.52.002125

Cooled Infrared Filters for the SLSTR Sentinel-3 Satellite

What is it about?

The Sea and Land Surface Temperature Radiometer (SLSTR) is a nine channel visible and infrared high precision radiometer designed to provide climate data of global sea and land surface temperatures.

Why is it important?

In this paper we describe the optical layout of infrared optics in the instrument, spectral thin-film multilayer design, and system channel throughput analysis for the combined interference filter and dichroic beamsplitter coatings to discriminate wavelengths at 3.74, 10.85 & 12.0 µm. The rationale for selection of thin-film materials, deposition technique, and environmental testing, inclusive of humidity, thermal cycling and ionizing radiation testing are also described.


Dr Gary J Hawkins
University of Reading

The SLSTR payload is destined to fly on the Ocean and Medium-Resolution Land Mission for the ESA/EU Global Monitoring for Environment and Security (GMES) Programme Sentinel-3 mission to measure the sea and land temperature and topography for near real-time environmental and atmospheric climate monitoring of the Earth.

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The following have contributed to this page: Dr Gary J Hawkins and Mr Richard E Sherwood