10 November 1975 Optical Design Considerations For A Far Infrared Spectrophotometer
Author Affiliations +
Proceedings Volume 0067, Long-Wavelength Infrared; (1975); doi: 10.1117/12.954535
Event: 19th Annual Technical Symposium, 1975, San Diego, United States
Abstract
The 2.4 meter aperture Large Space Telescope to be flown by the National Aeronautics and Space Administration in 1982 will include a far IR spectrophotometer which will operate from 2 to 1000 microns. The sensitivity of the instrument will be limited by the statistical fluctuations of the photons readiated by the primary, secondary, and asso-ciated relay optics over a large portion of the spectrum. To maintain the required sensitivity the detectors within the instrument must be cooled to 2 deg K as are the optical filters and some of the relay optics. At the long wavelengths diffraction effects within the relay optics must be included in the analysis because the optics dimensions are comparable to the Airy disc dimensions. The radiometer has been designed to minimize modulation noise resulting from a symmetrical imaging and non uniform background flux distribution.
© (1975) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
J. G. Thunen, W. H. Alff, "Optical Design Considerations For A Far Infrared Spectrophotometer", Proc. SPIE 0067, Long-Wavelength Infrared, (10 November 1975); doi: 10.1117/12.954535; https://doi.org/10.1117/12.954535
PROCEEDINGS
5 PAGES


SHARE
KEYWORDS
Sensors

Mirrors

Relays

Modulation

Diffraction

Space telescopes

Telescopes

RELATED CONTENT

SpectroCam 10 a 10 um spectrograph camera for the...
Proceedings of SPIE (October 20 1993)
Experimental Stray Light Measurements
Proceedings of SPIE (March 03 1981)
The optical design concept of SPICA-SAFARI
Proceedings of SPIE (September 21 2012)
Measurement Of Angular Response Of Space Telescopes
Proceedings of SPIE (September 26 1977)
Chromatic Aberration Of An All-Reflective Telescope
Proceedings of SPIE (January 09 1984)

Back to Top