Research on the Separated-aperture Optical System of Infrared Laser Dual-Mode Seeker

FAN Jun; LI Dongmei; WEI Jingbiao; HUANG Hai; CHEN Ce

doi:10.15892/j.cnki.djzdxb.2023.03.014

Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 3: 93 - 98

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.03.014

Research on the Separated-aperture Optical System of Infrared Laser Dual-Mode Seeker

FAN Jun ¹ ,
LI Dongmei ² ,
WEI Jingbiao ¹ ,
HUANG Hai ¹ ,
CHEN Ce ¹

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¹ Army Aviation Research Institute,Beijing 101121,China
² Institute of Semiconductors,Chinese of Academy of Sciences,Beijing 100083,China

Received date: 2022-10-25

Online published: 2025-02-07

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Abstract

Infrared laser dual-mode combined guidance is one of the trends in the future development of air-to-surface missiles. Compared to the single-mode system, the infrared laser dual-mode composite seeker has a more extended range, robust anti-interference capability, and better environmental suitability, which can satisfy the needs of future national defense technology. Infrared laser dual-mode combined optics are divided into separated-aperture and shared-aperture optics. This paper designed and compared the effects of these two designs on the infrared subsystem from the parameters of the Modulation Transfer Function (MTF), Vignetting coefficient, Minimum Resolvable Temperature Difference (MRTD), and Noise Equivalent Temperature Difference (NETD). The results showed that the separated-aperture optical system was superior to the shared-aperture optical system. Compared to the shared-aperture optics, the separated-aperture optics’ MTF has increased by 75% in 33-line logarithmic conditions, the proportion of non-vignetted rays is increased by 25%, and the NETD and MRTD are reduced by 61% and 65%, respectively. In addition, the Angle measurement error characteristics of the laser optical subsystem in the separated-aperture design were simulated and analyzed. The results show that the separation aperture design will not worsen the laser optical subsystem’s linearity.

Key words： dual-model seeker; separated-aperture; optical system

Cite this article

FAN Jun , LI Dongmei , WEI Jingbiao , HUANG Hai , CHEN Ce . Research on the Separated-aperture Optical System of Infrared Laser Dual-Mode Seeker[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(3) : 93 -98 . DOI: 10.15892/j.cnki.djzdxb.2023.03.014

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