High-performance infrared filters for the HIRDLS 21-channel focal plane detector array

Roger Hunneman; John J. Barnett; Gary John Hawkins

doi:10.1117/12.188110

30 September 1994 High-performance infrared filters for the HIRDLS 21-channel focal plane detector array

Roger Hunneman, John J. Barnett, Gary John Hawkins

Proceedings Volume 2210, Space Optics 1994: Space Instrumentation and Spacecraft Optics; (1994) https://doi.org/10.1117/12.188110
Event: Space Optics '94, 1994, Garmisch, Germany

Abstract

The High Resolution Dynamics Limb Sounder is described, with particular reference to the atmospheric measurements to be made and the rationale behind the measurement strategy. The demands this strategy places on the filters to be used in the instrument and the designs to which this leads to are detailed. A second set of filters at an intermediate image plane to reduce 'Ghost Imaging' is discussed together with their required spectral properties. The spectral characteristics of the primary and secondary filters in each channel are combined together with the spectral response of the detectors and other optical elements to obtain the system response weighted appropriately for the Planck function and atmospheric limb absorption. This method is used to demonstrate whether the out-of-band spectral blocking requirement for a channel is being met, and an example calculation is demonstrated showing how the blocking is built up for a representative channel. Finally, the techniques used to produce filters of the necessary submillimeter sizes together with the testing methods and procedures used to assess the environmental durability and establish space flight quality are discussed.

Citation Download Citation

Roger Hunneman, John J. Barnett, and Gary John Hawkins "High-performance infrared filters for the HIRDLS 21-channel focal plane detector array", Proc. SPIE 2210, Space Optics 1994: Space Instrumentation and Spacecraft Optics, (30 September 1994); https://doi.org/10.1117/12.188110

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