Optical image rotation eliminating mechanism of periscopic panoramic sighting telescope

Abstract

The invention discloses an optical image rotation eliminating mechanism of a periscopic panoramic sighting telescope. The optical image rotation eliminating mechanism comprises a prism rotating shaft system, a Pechan prism assembly, a direct-current torque motor and a photoelectric encoder. The prism rotating shaft system comprises a base and a rotating shaft coaxially mounted in the base, and the Pechan prism assembly is mounted on the rotating shaft; the direct-current torque motor and the photoelectric encoder are arranged at the two ends of the shafting respectively, the direct-current torque motor is located at the front end of the shafting, the photoelectric encoder is located at the rear end of the shafting, stators of the direct-current torque motor and the photoelectric encoder are fixedly installed on the base respectively, rotors and the rotating shaft are coaxially installed, the direct-current torque motor is used for driving the Pechan prism assembly rotating shaft system to rotate, the photoelectric encoder is used for real-time angle measurement and position feedback, and the image rotation eliminating function is achieved. The mechanism is simple in structure, low in manufacturing cost, convenient to install and adjust and high in imaging precision, and the problem of image rotation in the 360-degree panoramic sighting process of the periscopic panoramic sighting telescope is solved.

Description

technical field [0001] The invention belongs to the technical fields of optics and precision machinery, and relates to an optical derotation mechanism of a periscope-type periscope sight. Background technique [0002] At present, most of the peripheral sights use periscope optical systems, and there is an image rotation problem when the observation field scans with the azimuth rotation axis during the 360° peripheral sighting process. To solve this problem, the optical derotation method is usually adopted, that is, a derotation prism is installed in the optical path of the system based on the micro-rotation theorem of the reflective prism, and the derotation effect is achieved by the rotation of the derotation prism. Therefore, it is necessary to design a derotation mechanism to realize the rotation of the derotation prism. [0003] At present, the following methods are mainly used for de-image rotation: optical de-image-rotation, physical de-image-rotation, electronic de-i...

AI Technical Summary

Problems solved by technology

On the one hand, due to the transmission error of the gear set and the machining error, the image rotation error will be caused; on the other hand, the clearance and transmission efficiency of the gear transmission will affect its transmission accuracy. Adjusting and reducing the clearance of the gear set will easily cause the gear to rotate unsmoothly. The friction torque is increased, which in turn interferes with the stability of the turntable, thereby affecting the image stabilization accuracy of the entire system; moreover, the structure of the gear transmission group is relatively complicated, difficult to install and adjust, and high manufacturing cost

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