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Proceedings Paper

Development of low optical cross talk filters for VIIRS (JPSS)
Author(s): Vijay Murgai; Derek Hendry; Kevin Downing; David Carbone; John Potter
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Paper Abstract

The Visible/Infrared Imaging Radiometer Suite (VIIRS) is a key sensor on Suomi National Polar-orbiting Partnership (S-NPP) satellite launched on October 28, 2011 into a polar orbit of 824 km nominal altitude and the JPSS sensors currently being built and integrated. VIIRS collects radiometric and imagery data of the Earth’s atmosphere, oceans, and land surfaces in 22 spectral bands spanning the visible and infrared spectrum from 0.4 to 12.5 μm. Interference filters assembled in ‘butcher-block’ arrays mounted adjacent to focal plane arrays provide spectral definition. Out-of-band signal and out-of-band optical cross-talk was observed for bands in the 0.4 to 1 μm range in testing of VIIRS for S-NPP. Optical cross-talk is in-band or out-of-band light incident on an adjacent filter or adjacent region of the same filter reaching the detector. Out-of-band optical cross-talk results in spectral and spatial ‘impurities’ in the signal and consequent errors in the calculated environmental parameters such as ocean color that rely on combinations of signals from more than one band. This paper presents results of characterization, specification, and coating process improvements that enabled production of filters with significantly reduced out of band light for Joint Polar Satellite System (JPSS) J1 and subsequent sensors. Total transmission and scatter measurements at a wavelength within the pass band can successfully characterize filter performance prior to dicing and assembling filters into butcher block assemblies. Coating and process development demonstrated performance on test samples followed by production of filters for J1 and J2. Results for J1 and J2 filters are presented.

Paper Details

Date Published: 19 September 2016
PDF: 8 pages
Proc. SPIE 9972, Earth Observing Systems XXI, 997202 (19 September 2016); doi: 10.1117/12.2238227
Show Author Affiliations
Vijay Murgai, Raytheon Space and Airborne Systems (United States)
Derek Hendry, Raytheon Space and Airborne Systems (United States)
Kevin Downing, Materion Barr Precision Optics & Thin Film Coatings (United States)
David Carbone, Materion Barr Precision Optics & Thin Film Coatings (United States)
John Potter, Materion Barr Precision Optics & Thin Film Coatings (United States)

Published in SPIE Proceedings Vol. 9972:
Earth Observing Systems XXI
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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