Infrared imaging system employing inflatable membrane reflector and compensating mirror of inflatable membrane reflector

Abstract

The invention discloses an infrared imaging system employing an inflatable membrane reflector and a compensating mirror of the inflatable membrane reflector. The infrared imaging system comprises a membrane reflector, an optical path compensation mirror group and a detector, wherein parallel beams emitted from an object space enter a second polyimide film after being transmitted by a first polyimide film of the membrane reflector, are transmitted by the first polyimide film again after being reflected by the second polyimide film, and enter the optical path compensation mirror group; finally the beams compensated by the optical path compensation mirror group enter the detector to ideally image. The optical path compensation mirror group is added in front of the detector, and is matched with the membrane reflector, so that a surface-shape error between the actual surface shape and the ideal spherical surface of the membrane reflector can be effectively removed; the surface shape of the membrane reflector achieves ideal imaging requirements; the infrared imaging system is simple in process, and convenient to operate; the surface shape accuracy of the membrane reflector can be improved; and the imaging quality of the membrane reflector can also be improved.

Description

technical field [0001] The invention belongs to the technical field of optical imaging systems, and relates to an infrared imaging system using an inflatable film reflector and a compensation mirror thereof. Background technique [0002] With the rapid development of aerospace and military reconnaissance technology, the requirements for ultra-large and ultra-light optical mirrors are becoming more and more urgent. Thin film mirrors are space optical systems that use a flexible polymer film as the base and form the required curved surface in a certain way. It has the advantages of large aperture, low surface density, and low cost, effectively solving the contradiction between the large aperture and low weight of the space mirror. Therefore, its development is of great significance to the development of space technology and military reconnaissance capabilities. [0003] Inflatable film mirrors usually use polyimide film as the film material, which is an optical system that u...

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Problems solved by technology

[0005] Aiming at the non-spherical and typical aspheric curves of the existing inflatable film reflectors, which cannot meet the ideal imaging quality requirements, the present invention provides an infrared imaging system using an inflatable film reflector and its compensation mirror

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