An integrated flexible support structure for a rectangular off-axis metal mirror

Abstract

An integrated flexible support structure of a rectangular off-axis metal mirror belongs to the technical field of optical remote sensing. The support structure includes a mirror body and three flexible supports; wherein, the three flexible supports are arranged on the side surface of the mirror body with a uniform circumference; each flexible support includes a flexible board and two connection platforms, and the flexible board is fixed to the mirror body connection, the flexible board is provided with installation positioning screw holes, a first flexible slot, a second flexible slot and a third flexible slot, the first flexible slot and the second flexible slot are arc-shaped and arranged symmetrically with respect to the installation positioning screw holes, The middle part of the third flexible slot is arc-shaped, coaxial with the first flexible slot and the second flexible slot and arranged vertically. The connection platforms are respectively fixed on both sides of the flexible board. Fixed connection with the mirror body. The support structure can greatly reduce the change of gravity, the change of temperature and the internal stress of the mirror generated in the assembly process, and ensure the surface shape accuracy and the installation and positioning accuracy.

Description

technical field [0001] The invention belongs to the technical field of optical remote sensing, and in particular relates to an integrated flexible support structure of a rectangular off-axis metal mirror, and is especially suitable for an off-axis three-mirror space optical remote sensor. Background technique [0002] The space optical remote sensor is a space-borne highly lightweight and high-precision optical-mechanical imaging system. After the image of the ground scene is captured, the image can be used for disaster prevention and relief, homeland security, water conservancy monitoring, topographic mapping, ocean monitoring and Military reconnaissance and other fields. Due to its unique advantages such as no obstruction, no chromatic aberration, large field of view, high thermal stability and compact structure, the off-axis three-mirror optical system is gradually becoming the mainstream optical design of space optical remote sensors. When the off-axis three-mirror opti...

AI Technical Summary

Problems solved by technology

The disadvantages of this installation technique are: a). The flexible support structure needs to be adjusted manually through the ball head adjustment screw. The repeatability and reliability of the installation are low and the mirror surface is easily deformed during adjustment; b). All the flexible links are The gap-type flexible hinge does not provide translational freedom, and it is difficult to realize the compensation of thermal deformation difference; c). The combined design of the flexible link does not fully reflect the kinematic positioning principle in precision engineering, and there is an over-constraint problem on the mirror body

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