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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 3 — Jan. 20, 2010
  • pp: 542–548

Infrared optical element mounting techniques for wide temperature ranges

Bortolino Saggin, Marco Tarabini, and Diego Scaccabarozzi  »View Author Affiliations


Applied Optics, Vol. 49, Issue 3, pp. 542-548 (2010)
http://dx.doi.org/10.1364/AO.49.000542


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Abstract

We describe the optimization of a mounting system for the infrared (IR) optics of a spaceborne inter ferometer working in the temperature range between 120 ° C and + 150 ° C . The concept is based on an aluminum alloy frame with designed mechanical compliance, which allows for compensation of the different coefficient of thermal expansion between the optics and the holder; at the same time, the system provides for the high stiffness required to reach natural frequencies above 200 Hz , which are mandatory in most space missions. Thermal adapters with properly chosen thermomechanical characteristics are interposed between the metallic structure and the lens, so as to reduce the interface stresses on the mechanically weak IR material, due to both the thermoelastic and acceleration loads. With the proposed mount, the competitive requirements of stiffness and stress-free mounting can be matched in wide temperature ranges. The case study of the interferometer of a miniaturized Fourier transform IR spectrometer is presented.

© 2010 Optical Society of America

OCIS Codes
(120.6810) Instrumentation, measurement, and metrology : Thermal effects
(220.4880) Optical design and fabrication : Optomechanics
(120.6085) Instrumentation, measurement, and metrology : Space instrumentation

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: November 4, 2009
Manuscript Accepted: December 11, 2009
Published: January 20, 2010

Citation
Bortolino Saggin, Marco Tarabini, and Diego Scaccabarozzi, "Infrared optical element mounting techniques for wide temperature ranges," Appl. Opt. 49, 542-548 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-3-542

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