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Design Method of Flat Image Field Triple Anti-Astigmatism Telescope with Mirror Interval as Free Parameter

A technology of three anti-image elimination and design methods, which is applied in telescopes, instruments, optics, etc.

Active Publication Date: 2021-05-04
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

For the three-inverse astigmatism extinction system except the positive-negative-positive focal power combination, there is no other form of analysis of the three-inverse astigmatism extinction system design theory that can be solved, that is, there is no other form of analysis of the flat image field three Design method of anti-astigmatism telescope

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  • Design Method of Flat Image Field Triple Anti-Astigmatism Telescope with Mirror Interval as Free Parameter
  • Design Method of Flat Image Field Triple Anti-Astigmatism Telescope with Mirror Interval as Free Parameter
  • Design Method of Flat Image Field Triple Anti-Astigmatism Telescope with Mirror Interval as Free Parameter

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[0020] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0022] In the present invention, the design method of the flat image field three anti-astigmatism telescope with the mirror interval as the free parameter, the process is as follows figure 1 As mentioned, the design process is as follows:

[0023] Step 1. Determine the focal length f of the flat image field three anti-astigmatism telescope system according to t...

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Abstract

The design method of the flat image field triple anti-astigmatism telescope with the mirror interval as a free parameter relates to the technical field of telescope design, and solves the problem that there is no other form of analytical telescope design method, including: determining the focal length according to the application requirements; according to the flat image field three The mirror position or envelope size of the anti-stigmatization telescope system needs to determine the distance d between the primary mirror and the secondary mirror 1 , the distance d between the secondary mirror and the third mirror 2 , the distance between the rear surface of the three mirrors and the image plane d 3 ; According to the intersection height of paraxial marginal rays on the image plane and the third-order field curvature of the telescope are zero, d 1 、d 2 、d 3 and focal length, calculate the radius of curvature of the mirror; calculate the quadratic surface coefficient of the mirror according to zero third-order spherical aberration of the telescope, zero third-order coma of the telescope, zero third-order astigmatism of the telescope and radius of curvature. The invention can predetermine intuitive structural parameters before design, and at the same time, it is convenient to quickly give all design solutions of all three anti-stigmatized telescopes that meet the conditions.

Description

technical field [0001] The invention relates to the technical field of telescope design, in particular to a design method of a flat image field triple anti-astigmatism telescope with mirror spacing as a free parameter. Background technique [0002] The triple anti-stigmatism optical system can simultaneously correct the four primary aberrations of spherical aberration, coma, astigmatism and field curvature, so that diffraction-limited imaging quality can be achieved in a large field of view, and a compact design can be achieved . Since the design concept of the triple-anti-astigmatism telescope was put forward in the 1970s, it has been widely used in the fields of remote sensing and astronomical exploration. [0003] At present, the mainstream design method of the flat image field triple anti-astigmatism optical system is generally to use the three parameters of the obscuration ratio of the primary and secondary mirrors and the vertical axis magnification of the primary and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/00G02B23/00
CPCG02B23/00G02B27/0012G02B27/0025
Inventor 顾志远颜昌翔
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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