A study was conducted on the main four double-sided mirrors in a coaxial total reflective lens for a certain long wave infrared imaging. Two schemes of double-sided mirrors were designed to meet the weight reduction requirements, and a lightweight design was carried out for the double-sided mirrors; Modal analysis was conducted on two types of double-sided mirrors, indicating sufficient stiffness and good resistance to gravity deformation; Analyzed the mirror surface shape under pre tightening force of screws, indicating that double-sided mirrors have good deformation resistance; Option one was selected for the processing and testing of the reflector, and the surface RMS and PV met the design requirements; Finally, a random vibration test was conducted on the imaging system containing a double-sided mirror, and the visual axis jitter was within the specified range, indicating that the designed lightweight double-sided mirror meets the requirements for use.
The traditional laser semi-active seeker usually adopts the scheme of single lens plus four-quadrant detector. In this paper, the design scheme of four independent distributed optical systems plus unit detector is adopted. the overall scheme of the seeker detection system is analyzed; the position solution method is analyzed, and the best spot size is selected through calculation; the optical system is also designed, the rationality of the design is verified by ZEMAX image quality evaluation; the base structure is designed, and the base is simulated by ANSYS Workbench to ensure that its deformation is within the error range under the condition of large overload; finally, an experimental platform is built to calibrate the zero position of the designed prototype, and then the angle measurement ability of pitch direction and yaw direction is tested. It is verified that the system has a linear field of view of 10° and the angle measurement error is within 0.1°, which meets the design requirements.
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