An off-axis three-mirror optical system assembly and adjustment method

Abstract

The invention provides an overall design and assembly method of an off-axis three-mirror optical system, which belongs to the technical field of off-axis reflective imaging optical systems. The off-axis three-mirror optical system includes a primary mirror, a secondary mirror, a first mirror, a second Two reflective mirrors, dichroic plates, first flat mirror and second flat mirror, the non-reflective surfaces of the primary mirror, secondary mirror, first reflective mirror and second reflective mirror are processed into polished surfaces, and the secondary mirror is placed in the positioning frame of the secondary mirror , the rest of the lenses are placed in their respective positioning adjustment devices, the installation surface of the positioning adjustment device of the primary mirror is selected as the reference plane, and the relative height difference between the centers of the remaining mirror surfaces and the reference plane is determined, as well as the positioning dimensions of the reference points of the center of each mirror surface , through processing to determine the positioning frame of the secondary mirror and the mounting surface and positioning hole of the other lens positioning adjustment devices, and then cooperate with the inner focusing telescope and theodolite to perform self-collimation, realize real-time adjustment and precise positioning of each lens, achieve rapid adjustment and reduce adjustment Difficulty, the purpose of saving adjustment time.

Description

technical field [0001] The invention belongs to the technical field of off-axis reflection imaging optical systems, and in particular relates to an overall design and assembly method of an off-axis three-reflection optical system. Background technique [0002] The off-axis three-mirror imaging optical system is an important part of the space remote sensing measurement system, but because the off-axis three-mirror imaging optical system has a high utilization rate of convex high-order aspheric mirrors, each lens is relatively independent and has a large span, and the space of each lens can be adjusted. Due to the many degrees of freedom and other characteristics, when the off-axis three-mirror imaging optical system is installed and adjusted, it is difficult to determine the relative precise position of each lens, it is difficult to accurately adjust the spatial attitude of the lens, and the adjustment of the spatial attitude of the lens is discontinuous. Contents of the inv...

AI Technical Summary

Problems solved by technology

[0002] The off-axis three-mirror imaging optical system is an important part of the space remote sensing measurement system, but because the off-axis three-mirror imaging optical system has a high utilization rate of convex high-order aspheric mirrors, each lens is relatively independent and has a large span, and the space of each lens can be adjusted. Due to the many degrees of freedom and other characteristics, when the off-axis three-mirror imaging optical system is installed and adjusted, it is difficult to determine the relative precise position of each lens, it is difficult to accurately adjust the spatial attitude of the lens, and the adjustment of the spatial attitude of the lens is discontinuous, etc.

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