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Diffraction telescope optical system design method based on off-axis four reflecting mirrors

A technology of optical system and design method, which is applied in the direction of telescope, optics, optical components, etc., can solve the problems of less variable, difficult to meet, and large center obscuration, etc., and achieve simple and easy design method, increased degree of freedom, and excellent performance Effect

Active Publication Date: 2018-12-11
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

The structure of the diffraction telescope system based on two reflections or three reflections is relatively simple, but with few variables, it is difficult to meet the requirements of large field of view and wide band
In addition, in the case of a large field of view based on the coaxial reflective diffraction telescope system, the central occlusion will be too large, which will affect the imaging quality of the system

Method used

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  • Diffraction telescope optical system design method based on off-axis four reflecting mirrors
  • Diffraction telescope optical system design method based on off-axis four reflecting mirrors
  • Diffraction telescope optical system design method based on off-axis four reflecting mirrors

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] A design method of a diffraction telescope optical system based on off-axis four-mirror, the required conditions and implementation steps of the method are as follows:

[0029] Step 1. Calculation of the initial structural parameters based on the coaxial four-mirror diffraction telescope system

[0030] The optical system of the diffraction telescope is composed of a diffraction objective lens 1, a relay mirror, and a diffraction correction mirror. After the light is incident, it passes through the diffraction objective lens 1, the relay mirror, and the diffraction correction mirror in sequence to reach the image plane; among them, the relay mirror is designed as a three-mirror structure, the diffraction correction mirror is designed as a reflection type, and together constitute a four-mirror eyepiece system. The aperture and F number o...

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Abstract

The invention discloses a diffraction telescope optical system design method based on off-axis four reflecting mirrors, and belongs to the field of optical design. The diffraction telescope optical system is formed by a diffraction objective lens, a relay lens and a diffraction correcting lens, the conventional transmission type relay lens and the diffraction correcting lens are improved to reflecting mirrors for off-axis, a reflecting mirror is additionally provided based on a three-reflecting-mirror system, an off-axis four-reflecting-mirror type eyepiece is formed, and a diffraction telescope optical system design method based on the off-axis four-reflecting-mirrors is proposed. Compared with the transmission type system or the diffraction telescope optical system based on off-axis three reflecting mirrors, the design method is simple and easy to perform, the quantity of lenses of the designed optical system is small, the change parameters are many, and excellent performance is achieved in a range of large visual field and wide waveband.

Description

technical field [0001] The invention belongs to the field of optical design, in particular to a method for designing an optical system of a diffraction telescope based on four off-axis mirrors. Background technique [0002] With the increase of the aperture of optical telescopes, whether in terms of manufacturing technology or adjustment technology, it has become more and more difficult and costly to implement traditional telescopic systems. Restricting factors include: the traditional large-aperture telescopic system, which uses the principle of reflection to form images, requires high-precision mirrors, as well as an adaptive control system and support mechanism that can accurately adjust the surface shape and the position of each sub-mirror, so that the splicing of each mirror The root mean square value of the wavefront difference of the formed reflected wavefront reaches the order of nanometers. In addition, its weight is proportional to the square of the aperture, main...

Claims

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Application Information

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IPC IPC(8): G02B27/00G02B23/02
CPCG02B23/02G02B27/0012
Inventor 何传王黄鹏董小春范斌汪利华
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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