Optical remote sensor using structural deformation amount to compensate misalignment rate of optical system

Abstract

The invention discloses an optical remote sensor using structural deformation amount to compensate the misalignment rate of an optical system. The optical remote sensor using the structural deformation amount to compensate the misalignment rate of the optical system includes a primary mirror, a secondary mirror, a folding mirror, a beam splitter, a triple mirror, a main bearing frame and an elastic supporting rod; the main bearing frame includes a front mounting surface and a rear mounting surface back to the front mounting surface; the primary mirror is elastically mounted on the front mounting surface; the secondary mirror is elastically connected to one end of the supporting rod and opposite to the primary mirror in a spaced manner; the end of the supporting rod away from the secondarymirror is connected to the front mounting surface; the folding mirror and the beam splitter are mounted on the rear mounting surface; and the triple mirror is mounted on the rear mounting surface andopposite to the beam splitter in a spaced manner. By means of the optical remote sensor using the structural deformation amount to compensate the misalignment rate of the optical system, the primary mirror and the secondary mirror deviate from the theoretical position by the deformation amount under the action of gravity, so that the best pose of the primary mirror and the secondary mirror is adjusted under the gravity of the ground; after the space remote sensor launches into orbit and gravity deformation rebound release occurs, the position relationship between the primary mirror and the secondary mirror can still maintain the position relationship during adjustment, and the image quality of the space remote sensor is not affected.

Description

technical field [0001] The invention relates to the technical field of space remote sensing, in particular to an optical remote sensor which uses structural deformation to compensate the misalignment of an optical system. Background technique [0002] Space optical remote sensors have important applications in astronomical observation, space exploration, weather forecasting, earth observation, military applications and other fields. With the continuous development of space remote sensing technology, the resolution requirements for space optical remote sensors are getting higher and higher, and the requirements for focal length and aperture of optical systems are also increasing. [0003] As the focal length and aperture of space optical remote sensors continue to increase, their size and weight also increase sharply. When the remote sensor is assembled and tested on the ground, the gravity will affect the surface shape accuracy and pose accuracy of the large-scale reflector,...

AI Technical Summary

Problems solved by technology

When the remote sensor is launched into orbit and works in the space microgravity environment, the gravitational deformation introduced by the remote sensor when it is installed on the ground will rebound and release, resulting in a certain surface shape accuracy error and pose of each mirror in the remote sensor. Error, the optical element deviates from the best position in the optical system, which makes the optical system out of adjustment, thus affecting the on-orbit imaging quality of the remote sensor

[0004] For the impact of gravity, people have proposed various solutions, such as gravity unloading technology, improved support methods, and lightweight technology. Large-aperture optical components are not misaligned in orbit

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