Off-axis three-reflector device

Abstract

The invention relates to an off-axis three-reflector device. The device comprises a first reflector assembly, a second reflector assembly and a third reflector, and further comprises a frame and a detector assembly, wherein a cavity is formed in the frame, the second reflector assembly is arranged at the top of the cavity, the first reflector assembly and the third reflector are arranged at the bottom of the cavity, the detector assembly is arranged at the top of the cavity and penetrates through the frame, the detector assembly comprises a detection head, and the first reflector assembly andthe second reflector assembly are controlled to swing through a motor. Compared with the prior art, the off-axis three-reflector device solves the problems that in the case of an existing off-axis three-reflector device, lens adjustment is difficult, manual adjusting precision is low and lens deformation is caused due to the lens installing acting force, and the effects that reflecting reflectorscan be automatically adjusted, the adjusting precision of the reflecting reflectors is high, and lens stress deformation is small after lens installation are achieved.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to an off-axis three-mirror device. Background technique [0002] Reflective optical systems include coaxial reflection, catadioptric system, and off-axis reflection. Among them, off-axis reflection is favored because of its good imaging quality, no obstruction, and easy to satisfy the optical gain of the system. The off-axis three-mirror optical system is widely used in the field of space optical remote sensing due to its characteristics of large field of view, high resolution, long focal length, wide wavelength band, and high modulation transfer function. Before using the off-axis three-mirror device, it is necessary to sequentially adjust and align the three mirrors with the help of an interferometer. The installation and adjustment of the system is extremely difficult, requiring a lot of time and manpower, and the manual adjustment error is relatively large. [0003] In...

AI Technical Summary

Problems solved by technology

Before installing the reflector, it is necessary to process threaded holes on the mirror surface. Machining will exert force on the mirror surface, causing the mirror surface to be slightly deformed. At the same time, after the reflector is installed, since the reflector needs to be adjusted at any angle in space, there are multiple screws. If the mirror is tightened, there will be many screw holes on the lens to generate stress concentration, which will increase the deformation of the mirror surface and affect the reflection performance of the lens, which will greatly affect the performance of the device. At the same time, the flexibility and adaptability of the current off-axis three-reflection device Poor, cannot adjust the mirror space position in real time according to the requirements

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