NIRCam cryo filter wheel assembly design and performance

Charles S. Clark; Béla I. Privári

doi:10.1117/12.2024462

27 September 2013 NIRCam cryo filter wheel assembly design and performance

Charles S. Clark, Béla I. Privári

Proceedings Volume 8863, Cryogenic Optical Systems and Instruments 2013; 88630E (2013) https://doi.org/10.1117/12.2024462
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

The filter wheel assembly (FWA) is an integral and important sub-system of the Near Infrared Camera (NIRCam) instrument on the James Webb Space Telescope (JWST). The optic elements in each of the four FWA mechanisms on NIRCam are used to conduct science operations as well as calibration of the NIRCam instrument and the JWST observatory. The FWA mechanism can position one of 12 different filters in the optical path of the camera and position one of 12 different pupil optics in the same path. The filters and pupil optics are mounted in two separate wheel assemblies in the FWA that can be positioned independently to provide the desired optical configuration for imaging. Along with the rest of the instrument, the FWA operates at cryogenic temperatures and is used for both short and long wavelength imaging. This paper reviews significant elements of the FWA mechanism design.

Citation Download Citation

Charles S. Clark and Béla I. Privári "NIRCam cryo filter wheel assembly design and performance", Proc. SPIE 8863, Cryogenic Optical Systems and Instruments 2013, 88630E (27 September 2013); https://doi.org/10.1117/12.2024462

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