Design of Optical Window Aberration Correction for Conformal Photoelectric Anti-Collision System

Hangkong bingqi

Han Xiulai, Nie Liang, Ren Mengru¹ 

[1] Institute of Optoelectronic Engineering, Xi’an University of Technology, Xi’an 710021, China;

关键词: |optical design|conformal optics|ellipsoid window|aberration correction|zernike polynomial|photoelectric detection|helicopter;   

DOI  :  10.12132/ISSN.1673-5048.2021.0051

来源: DOAJ

【 摘 要 】

In order to meet the requirements of the new generation combat helicopter to maintain the precision strike capability under the high speed flight, the photoelectric detection system and optical window are designed with conformal layout. According to the multi band (0.4~0.7 μm/1.064 μm/3.7~4.8 μm)requirements of conformal photoelectric anti-collision system and flight Mach number of helicopter at 0.3~0.4, an ellipsoid with length diameter ratio of 1, diameter of 100 mm, thickness of 5 mm and material of MgF2 is designed as the optical window surface of conformal photoelectric anti-collision system. Zernike polynomial is used to analyze the relationship between the aberration introduced by the optical window and the scanning field of view at different wavebands. The design method of placing the fixed correction system behind the optical window is adopted to correct the aberration introduced by the optical window. The results show that after two corrections, the P-V value of Zernike aberration coefficients in visible band is less than 0.6λ, laser band is less than 0.4λ, infrared band is less than 0.1λ. The aberration correction effect is good and meets the design requirements.

【 授权许可】

Unknown