1 December 1991 Optical figure testing of prototype mirrors for JPL's precision segmented-reflector program
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Proceedings Volume 1542, Active and Adaptive Optical Systems; (1991); doi: 10.1117/12.48834
Event: San Diego, '91, 1991, San Diego, CA, United States
Abstract
JPL's PSR program is developing enabling technologies for large space telescopes employing segmented optics, and in particular, lightweight, thermally stable mirrors for telescopes operating at sub-mm wavelengths. JPL's vacuum cryointerferometric optical test facility includes a computer-controlled phase shifting interferometer operating at 10.59 microns and laser metrology for measurement of piston and absolute radius of curvature. The optical metrology has been integrated with a large vacuum chamber including a liquid nitrogen shroud capable of radiatively cooling 1.5 meter aperture mirrors down to 150 K. The facility is now being used to characterize prototype mirrors in both their room-temperature 'as-replicated' condition, and under orbital temperature conditions. The performance and limitations of the optical metrology hardware and software components are noted. Representative test results on prototype one meter-class composite mirrors being developed for PSR and related ground-based programs are also presented.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eric B. Hochberg, "Optical figure testing of prototype mirrors for JPL's precision segmented-reflector program", Proc. SPIE 1542, Active and Adaptive Optical Systems, (1 December 1991); doi: 10.1117/12.48834; https://doi.org/10.1117/12.48834
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Mirrors

Prototyping

Spatial frequencies

Active optics

Interferometers

Optical testing

Space telescopes

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