High rigidity and light space camera lens cylinder and test method for vibration resistance stability thereof

Abstract

The invention discloses a high rigidity and light space camera lens cylinder and a test method for vibration resistance stability thereof. The cylinder comprises a cylinder body, a main mirror flange,a secondary mirror flange and a reinforcing rib. The cylinder body is a hollow cylinder. One end of the cylinder body is provided with a main mirror flange for connecting a space camera main mirror,and the other end of the cylinder is provided with the secondary mirror flange for connecting the space camera secondary mirror. The outer side of the cylinder body is provided with a reinforcing ribfor reinforcing the structure. The cylinder body, the main mirror flange, the secondary mirror flange and the rib are integrally formed by three-dimensional braiding silicon carbide. According to theinvention, the overall structure of the lens cylinder is optimized by integrally forming the cylinder body, the flanges and the reinforcing rib through using the three-dimensional braiding of siliconcarbide materials, and the defect that the traditional metal support structure is too heavy and has a large self-expansion coefficient is overcome; by designing the vibration resistance stability testmethod of the lens cylinder structure, the stability of the entire lens cylinder is ensured; and the problem of quite poor stability of the conventional resin-based composite material is solved.

Description

technical field [0001] The invention relates to a high-rigidity and lightweight space camera lens barrel, which is especially suitable for supporting between a primary mirror and a secondary mirror of a high-resolution space camera, and belongs to the technical field of internal support structures of space cameras. Background technique [0002] Aerospace high-resolution cameras mostly use a cylinder as a supporting structure. The change in the distance between optical parts caused by temperature will be determined by the linear expansion coefficient of the cylinder, and the change in the distance between optical parts will cause extreme differences in focal length and image plane position. Large changes, so the thermal stability of the optical spacing must be strictly controlled. [0003] General materials such as aluminum alloy or titanium alloy, due to the large linear expansion coefficient of the material itself, are mostly used as small structural size lens barrels. The...

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Problems solved by technology

[0005] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, the present invention provides a high-rigidity and light-weight space camera lens barrel, which optimizes the The overall structure of the lens barrel makes up for the defects of the traditional metal support structure that is too heavy and has a large expansion coefficient; through the design of the anti-vibration stability test method of the lens barrel structure, the overall stability of the lens barrel is ensured, and the traditional problem is solved. The problem of poor stability of resin matrix composites

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