9 May 2018 Ruggedizing vibration sensitive components of electro-optical module using wideband dynamic absorber
Author Affiliations +
In the modern design approach, the cold portion of Integrated Dewar-Detector-Cooler-Assembly (substrate, infrared focal plane array, cold shield and cold filter) is directly mounted upon the distal end of a cold finger of a cryogenic cooler with no mechanical contact with the warm Dewar shroud. This concept allows for essential reduction of parasitic (conductive) heat load. The penalty, however, is that resulting tip-mass cantilever is lightly damped and, therefore, prone to vibrational extremes typical of the modern battlefield. Without sufficient ruggedizing, vibration induced structural resonances may affect image quality and even may cause mechanical failures due to material fatigue. Use of additional front supports or thickening the cold finger walls results in increased parasitic conductive heat load, power consumption and mechanical complexity. The authors explore the concept of wideband dynamic absorber in application to ruggedizing the Integrated Dewar-Detector-Cooler Assembly.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander Veprik, Alexander Veprik, Yaki Openhaim, Yaki Openhaim, Vladimir Babitsky, Vladimir Babitsky, Avi Tuito, Avi Tuito, } " Ruggedizing vibration sensitive components of electro-optical module using wideband dynamic absorber", Proc. SPIE 10626, Tri-Technology Device Refrigeration (TTDR) III, 1062608 (9 May 2018); doi: 10.1117/12.2309335; https://doi.org/10.1117/12.2309335


The art and science of missile defense sensor design
Proceedings of SPIE (June 03 2014)
Lockheed Martin microcryocoolers
Proceedings of SPIE (May 05 2017)
Stability evaluation of staring InSb imagers
Proceedings of SPIE (May 30 1995)
USAF space sensing cryogenic considerations
Proceedings of SPIE (February 04 2011)

Back to Top