Design and analysis of the opto-mechanical structure for an airborne laser expander system

Mengqi Shao; Zhenchong Xing; Wei Wang; Zikang Hu; Biyao Wang; Shaobo Li

doi:10.1117/12.2648595

14 October 2022 Design and analysis of the opto-mechanical structure for an airborne laser expander system

Mengqi Shao, Zhenchong Xing, Wei Wang, Zikang Hu, Biyao Wang, Shaobo Li

Proceedings Volume 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022); 1234318 (2022) https://doi.org/10.1117/12.2648595
Event: 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 2022, Qingdao, China

Abstract

In response to the harsh environmental conditions and the strict requirements for payload mass of the airborne platform, a structural design method is proposed for a good performance stability, lightweight and miniaturized laser expander system. In order to realize the lightweight and miniaturization design of the laser expander system, a miniaturized coaxial catadioptric defocus optical system is designed consisting of mirrors and lens. To ensure the stability and lightweight of the structure, the flexure and the main support structure which combined the thin-wall cylinder and truss are designed for the mirrors and lens. Finally, the engineering analysis of the system is carried out. The results show that the relative decenter and spacing between primary mirror and secondary mirror are 2.28μm and 5.92μm under normal working condition, respectively. The maximum surface shape error of the mirrors is 5.42nm. The first-order natural frequency of the system is 349.6Hz, and the maximum value of the root-mean-square of acceleration response under random vibration excitation occurs on the primary mirror, and the amplification factor is 7.1. It meets the mechanical performance requirements of airborne platform.

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Mengqi Shao, Zhenchong Xing, Wei Wang, Zikang Hu, Biyao Wang, and Shaobo Li "Design and analysis of the opto-mechanical structure for an airborne laser expander system", Proc. SPIE 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 1234318 (14 October 2022); https://doi.org/10.1117/12.2648595

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KEYWORDS

Mirrors

Laser systems engineering

Laser communications

Optical design

Airborne laser technology

Structural design

Telecommunications

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