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Proceedings Paper

Thermal/structural/optical integrated design for optical window of a high-speed aerial optical camera
Author(s): Gaopeng Zhang; Hongtao Yang; Chao Mei; Kui Shi; Dengshan Wu; Mingrui Qiao
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Paper Abstract

In order to obtain high quality image of the aero optical remote sensor, it is important to analysis its thermal-optical performance on the condition of high speed and high altitude. Especially for the key imaging assembly, such as optical window, the temperature variation and temperature gradient can result in defocus and aberrations in optical system, which will lead to the poor quality image. In order to improve the optical performance of a high speed aerial camera optical window, the thermal/structural/optical integrated design method is developed. Firstly, the flight environment of optical window is analyzed. Based on the theory of aerodynamics and heat transfer, the convection heat transfer coefficient is calculated. The temperature distributing of optical window is simulated by the finite element analysis software. The maximum difference in temperature of the inside and outside of optical window is obtained. Then the deformation of optical window under the boundary condition of the maximum difference in temperature is calculated. The optical window surface deformation is fitted in Zernike polynomial as the interface, the calculated Zernike fitting coefficients is brought in and analyzed by CodeV Optical Software. At last, the transfer function diagrams of the optical system on temperature field are comparatively analyzed. By comparing and analyzing the result, it can be obtained that the optical path difference caused by thermal deformation of the optical window is 149.6 nm, which is under PV ≤1 4λ .The simulation result meets the requirements of optical design very well. The above study can be used as an important reference for other optical window designs.

Paper Details

Date Published: 15 October 2015
PDF: 9 pages
Proc. SPIE 9676, AOPC 2015: Optical Design and Manufacturing Technologies, 96760W (15 October 2015); doi: 10.1117/12.2199812
Show Author Affiliations
Gaopeng Zhang, Xi'an Institute of Optics and Precision Mechanics (China)
Hongtao Yang, Xi'an Institute of Optics and Precision Mechanics (China)
Graduate School of Chinese Academy of Sciences (China)
Chao Mei, Xi'an Institute of Optics and Precision Mechanics (China)
Kui Shi, Xi'an Institute of Optics and Precision Mechanics (China)
Dengshan Wu, Xi'an Institute of Optics and Precision Mechanics (China)
Mingrui Qiao, Xi'an Institute of Optics and Precision Mechanics (China)
Graduate School of Chinese Academy of Sciences (China)


Published in SPIE Proceedings Vol. 9676:
AOPC 2015: Optical Design and Manufacturing Technologies
Lin Li; Kevin P. Thompson; Ligong Zheng, Editor(s)

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