Mounting large optics for space instruments

Richard C. Robinson; Gail E. Bingham; Steven L. Folkman

doi:10.1117/12.455130

8 February 2002 Mounting large optics for space instruments

Richard C. Robinson, Gail E. Bingham, Steven L. Folkman

Proceedings Volume 4486, Infrared Spaceborne Remote Sensing IX; (2002) https://doi.org/10.1117/12.455130
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

Space based optical instruments are evolving toward large apertures and requiring high sensitivity at longer wavelengths. Instruments that collect light at wavelengths longer than about 15 microns often use Potassium Bromide (KBr) as part of the optical system. Since KBr has rather poor mechanical properties, many engineers have been hesitant to design instruments with KBr optics larger than a few centimeters. This problem is made more difficult by the fact that sensors in these longer wavelengths are often operated at cryogenic temperatures to minimize self- emission. The overall objective of this effort was to examine methods of mounting KBr optics to improve their vibrational, optical, and thermal characteristics. A legacy KBr mount is examined and revised to increase its robustness and scalability. Using finite element models and dynamic testing, the limits of the current design was explored. An alternative design using a bonded support was investigated. A new thermally engineered composite material (TECMat) was developed that appears to match the thermal expansion of KBr over a wide temperature range. TECMat's general properties and possible methods of implementing it in optical mount are described.

Citation Download Citation

Richard C. Robinson, Gail E. Bingham, and Steven L. Folkman "Mounting large optics for space instruments", Proc. SPIE 4486, Infrared Spaceborne Remote Sensing IX, (8 February 2002); https://doi.org/10.1117/12.455130

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