Electro-optical systems play a critical role in numerous applications, such as remote sensing, space exploration, laser communication, aerial imaging, and other pertinent domains. High-accuracy optical-beam stabilization of large-aperture electro-optical systems remains a challenging task, especially under complex imaging environments.
In a study published in IEEE Photonics Journal, a research group led by JIA Ping and TIAN Dapeng from the Key Laboratory of Airborne Optical Imaging and Measurement, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP) of the Chinese Academy of Sciences (CAS) demonstrated the comprehensive performance evaluation of optical-beam stabilization platforms (OBSPs) with different supports for large-aperture electro-optical system. OBSP provides high-precision inertial reference for measurement of full link optical-beam jitter in large-aperture electro-optical systems. To ensure that its optical-beam stability meets system alignment needs, performance evaluation of OBSP is necessary.
Considering two OBSPs with flexible and rigid support, their optical-beam stability performance and effect on image quality were evaluated and compared via theoretical and experimental means. The results revealed that under same sensor and control algorithm conditions, the two OBSPs performed well on dynamic-frequency characteristics and two-axis motion decoupling, achieving dynamic optical-beam stabilization accuracy of 7.934 μrad and 5.762 μrad under 0.5-100Hz wide-band excitation, respectively. Moreover, optical systems equipped with OBSPs demonstrated better imaging performance (modulation transfer function value of 21% at 50 lp/mm with stable residuals of less than 7 μrad).
The findings of this study provide a ready reference for the design of meter level large-aperture electro-optical systems for applications in laser communication, aerial imaging and other fields.
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