Athermalization of Long Focal Length IR Optical Systems by Hydraulics

Abstract:

The effects of temperature changes on the focus of IR optical system are described in this paper, and the general methods used for compensation of thermal effects are analyzed. On this basis, the feasibility of athermalization of long focal length IR optical systems by using of hydraulics is studied, and an athermalization design of an uncooled IR optical system with focal length 200mm and F-number 1 is presented. The result shows that within the temperature range from -30 to 50 °C, the defocus of this system is less than the depth of focus.

• Periodical: Key Engineering Materials (Volume 552)
• Pages: 38-43
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.552.38
• Online since: May 2013
• Authors: Jun Yan Zhao, Guang Hu Du, Zhi Peng Qin
• Keywords: Athermalization, Hydraulics, IR Optics

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