A small reflective off-axis telescopic system with wide field of view and large relative aperture

Abstract

The invention provides a small reflection type off-axis telescoping system with wide view field and big relative aperture, and relates to an optical design of a telescopic system. Compared with many former designs, wide view field, big relative aperture and telecentric image space can be quite easily achieved and the optical design has excellent imaging quality. According to the invention, parallel light beams emitted by a target penetrate through an entrance pupil diaphragm and irradiates a first reflection mirror; the reflected light penetrates through a first stray light eliminating diaphragm and irradiates a second reflection mirror; the reflected light penetrates through a second stray light eliminating diaphragm and irradiates a third reflection mirror; the reflected light irradiatesa fourth reflection mirror; and light passing through the fourth reflection mirror is condensed on a slit or a needle hole. According to the invention, the optical system has wide view field and coverage range, bit relative aperture, wide working spectrum range, and high transmission functions, and is free from color difference correction, small in size and light in weight; and great convenient is brought for following optical systems. The system can be applied to the field of space flight and aviation atmosphere environment monitoring, ocean environment monitoring and territorial resource remote sensing, the like.

Description

technical field [0001] The invention belongs to the field of optical measurement methods, in particular to an ultra-wide field of view off-axis reflective telescopic system for collecting and converging scattered light from the ground surface and the sky in optical remote sensing, and is mainly used in space-borne or airborne spectral imagers Advanced optical system, space exploration and earth observation. Background technique [0002] At present, with the continuous development of space optics technology and optical remote sensing applications, the requirements for ground width are getting higher and higher, and the wide width can shorten the return visit cycle; at the same time, the requirements for the spatial resolution and spectral resolution of the optical system are also getting higher and higher. The higher the resolution, the higher the accuracy of the collected data; and the higher the requirement for the signal-to-noise ratio of the optical system, the optical sy...

AI Technical Summary

Problems solved by technology

However, even if the system can obtain better image quality, it is difficult to achieve a wide field of view of 70° or more than 100°

In addition, in some telephoto systems, the final focused image under wide field of view is severely distorted, which affects data processing.

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