Cryogenic and ambient testing of the Composite Infrared Spectrometer (CIRS) beryllium telescopes

Patricia Ann Hayes; Julie A. Crooke; Brendon D. Perkins

doi:10.1117/12.178609

23 June 1994 Cryogenic and ambient testing of the Composite Infrared Spectrometer (CIRS) beryllium telescopes

Patricia Ann Hayes, Julie A. Crooke, Brendon D. Perkins

Proceedings Volume 2227, Cryogenic Optical Systems and Instruments VI; (1994) https://doi.org/10.1117/12.178609
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

One of two flight qualified beryllium 0.5 m diameter F/6 Cassegrain telescopes from the Modified InfraRed Interferometer Spectrometer (MIRIS) project is baselined to be flown on the Cassini mission as part of Composite InfraRed Spectrometer (CIRS) instrument. The imaging requirement for the CIRS telescope, 80% ensquared energy within 500 microns, is more stringent than that for MIRIS (95% encircled energy within 0.9 mm). Because the MIRIS telescopes had never been tested at cryogenic temperatures, only ambient data existed for these subsystems. A 0.864 meter liquid nitrogen dewar is being modified and will be used to perform in-house double pass and single pass ensquared energy tests of the beryllium telescopes at 170 K. This paper summarizes the ambient and cryogenic optical tests performed, the results and the status of the new cryogenic facility.

Citation Download Citation

Patricia Ann Hayes, Julie A. Crooke, and Brendon D. Perkins "Cryogenic and ambient testing of the Composite Infrared Spectrometer (CIRS) beryllium telescopes", Proc. SPIE 2227, Cryogenic Optical Systems and Instruments VI, (23 June 1994); https://doi.org/10.1117/12.178609

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available