Discrete space camera secondary lens precision adjusting and fixing method

Abstract

The invention discloses a discrete space camera secondary lens precision adjusting and fixing method which includes the following steps: connecting a general 5D adjusting mechanism with a secondary lens structure; getting the 3D translation and 2D tilt needed for the adjustment of the secondary lens; using the general 5D adjusting mechanism to adjust the secondary lens; using a filler gauge to getthe gap thickness d1; making a gasket with the gap thickness d1 as a center value; inserting the thin end of the gasket into the gap, and taking the contact position of the gasket and the secondary lens structure as a marking position; with the marking position of the gasket as the center, cutting off a plurality of secondary lens gaskets at a certain interval from the thin end and the thick endrespectively; and selecting a qualified gasket from the secondary lens gaskets, and installing the gasket in the gap between the secondary lens structure and the end face of a lens cone. The problem on 5D precision adjustment of the secondary lens of a space camera and fixation of the secondary lens after adjustment is solved, and the position of the fixed secondary lens can be kept highly stablebefore and after vibration test of the space camera.

Description

technical field [0001] The invention relates to the technical field of aerospace optical remote sensors, in particular to a discretized method for precise adjustment and fixing of a secondary mirror of a space camera. Background technique [0002] Large F-number, long focal length, light-duty, high-resolution space camera lens adjustment on the ground puts forward requirements for micron-level translation adjustment and second-level tilt adjustment for the adjustment of the secondary mirror, and the tilt change during the fixing process of the secondary mirror is required to be no more than 5″. The amount of translation change is not more than 5μm to minimize the degradation of lens image quality. In order to ensure the adjustment and fixing accuracy of the secondary mirror, a detachable five-dimensional adjustment mechanism is used to adjust the secondary mirror. The secondary mirror spacer is installed and fixed between the structure and the end face of the lens barrel. In...

AI Technical Summary

Problems solved by technology

At present, the adjustment of the secondary mirror of the existing reflective space camera lens on the ground uses a built-in adjustment mechanism. After the secondary mirror is adjusted, it is directly fixed, but the adjustment mechanism cannot be removed. The weight of the adjustment mechanism accounts for part of the weight of the space camera, and the translation The adjustment can only reach the order of 10 microns

Existing technologies cannot meet the requirements of large F-number, long focal length, light-duty, high-resolution space camera lens, the adjustment accuracy of the secondary mirror and the accuracy of the discrete secondary mirror gasket fixing accuracy.

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