Small relative aperture folding optical path coaxial system

Abstract

The invention relates to a small relative aperture folding optical path coaxial system. The small relative aperture folding optical path coaxial system includes a primary mirror, a secondary mirror, abreaking mirror, a triple mirror and a focal plane, wherein the optical path is injected to the breaking mirror from infinite distance; the light arrives at the secondary mirror after reflection andconverge through the primary mirror, and then the light arrives at the break mirror after being reflected by the secondary mirror, and then the light is converged between the secondary mirror and thefolding mirror to form a primary image; and the light arrives at the triple mirror after being broken by the breaking mirror, and then the light is converged at a focal plane to form a secondary imageafter being reflected by the triple. The small relative aperture folding optical path coaxial system can guarantee that MFT satisfies the requirement when the optical system is close to the diffraction limit, at the same time uses the breaking mirror folding optical path to maximally compress the volume of the optical system, and uses a secondary image system to put the breaking mirror of the camera nearby the primary image and the exit pupil, and the primary image is closes to the primary mirror to reduce the opening size of the center of the primary mirror as smaller as possible, thus greatly reducing the volume of the system and reducing the difficulty and weight of camera development.

Description

technical field [0001] The invention belongs to the technical field of aerospace space cameras, and relates to a small relative aperture folded optical path coaxial system. Background technique [0002] In the application of optical remote sensing, as the user's demand for the spatial resolution of the remote sensor is getting higher and higher, the focal length of the optical system is getting longer and longer, which leads to an increasing aperture and length of the optical system. Large aperture and long focal length increase the difficulty of camera development. Large aperture and long focal length will inevitably bring difficulties in optical and system design. For example, the processing, assembly, and support of large aperture mirrors are all difficult problems in the field of optical mechanical design. At the same time, the large aperture and long focal length lead to an increase in the volume and weight of the optical-mechanical system, which is also a major challe...

AI Technical Summary

Problems solved by technology

At the same time, the large aperture and long focal length lead to an increase in the volume and weight of the optical-mechanical system, which is also a major challenge to the satellite platform. At the same time, the large volume and heavy weight will greatly increase the development and launch costs of the satellite.

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