A vacuum-compatible, spectrally tuneable, flat panel uniform source for testing large aperture earth observation systems

Jeffrey Holt; Julia Barsi; Theodore Schwarz; Eugene Waluschka; Mark Schwarz; Robert Bousquet; Craig Kent; Paul Mascia; Robert Lambeck; Luke Dobrowski; Boryana Efremova; Dan Scharpf

doi:10.1117/12.3023845

3 October 2024 A vacuum-compatible, spectrally tuneable, flat panel uniform source for testing large aperture earth observation systems

Jeffrey Holt, Julia Barsi, Theodore Schwarz, Eugene Waluschka, Mark Schwarz, Robert Bousquet, Craig Kent, Paul Mascia, Robert Lambeck, Luke Dobrowski, Boryana Efremova, Dan Scharpf

Author Affiliations +

Proceedings Volume 13143, Earth Observing Systems XXIX; 1314306 (2024) https://doi.org/10.1117/12.3023845
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

Labsphere, Inc. in conjunction with NASA GSFC and Genesis Engineering Solutions Inc., has developed an innovative, vacuum compatible, calibration spectro-radiometric illumination source with a highly uniform large-area rectangular flat panel active area. This device features a uniquely shaped diffuse integration geometry to achieve high uniformity over a large active output area while maintaining a smaller and more robust overall form-factor when compared to previous designs or integrating spheres. A new liquid-cooled hybrid quartz-tungsten (QT) and light emitting diode (LED) source module has been engineered to provide direct-in-vacuum reference illumination over the full dynamic range and spectrum of the VIIRS instrument’s optical bands during pre-launch testing. The first unit has been demonstrated to meet its requirements using ambient technology and a fully-vacuum-compatible second unit is planned to allow testing in thermal vacuum (TVAC) campaigns. This technology is flexible and capable of meeting the needs of many other instruments/missions requiring this type of test/calibration capability.

Conference Presentation

Citation Download Citation

Jeffrey Holt, Julia Barsi, Theodore Schwarz, Eugene Waluschka, Mark Schwarz, Robert Bousquet, Craig Kent, Paul Mascia, Robert Lambeck, Luke Dobrowski, Boryana Efremova, and Dan Scharpf "A vacuum-compatible, spectrally tuneable, flat panel uniform source for testing large aperture earth observation systems", Proc. SPIE 13143, Earth Observing Systems XXIX, 1314306 (3 October 2024); https://doi.org/10.1117/12.3023845

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