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Hybrid Surface Off-Axis Triple Mirror Optical System

An optical system and off-axis three-mirror technology, applied in the optical field, can solve the problems of limited application range of small F-number field of view, few types of hybrid surface optical systems, etc., and achieve good imaging quality, large field of view, and easy mass production Effect

Active Publication Date: 2020-02-07
TSINGHUA UNIV +1
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Problems solved by technology

[0003] However, there are few types of existing hybrid surface optical systems, and they are mainly suitable for small viewing angles and large F-number fields of view. For fields with large viewing angles and small F-numbers, the application range is limited.

Method used

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  • Hybrid Surface Off-Axis Triple Mirror Optical System
  • Hybrid Surface Off-Axis Triple Mirror Optical System
  • Hybrid Surface Off-Axis Triple Mirror Optical System

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Embodiment Construction

[0026] The design method of the hybrid surface optical system provided by the present invention and the hybrid surface optical system obtained through the design method will be further described in detail below with reference to the drawings and specific embodiments.

[0027] A method for designing a hybrid surface optical system, comprising the following steps:

[0028] S1: Establish a first initial system, the first initial system includes a plurality of initial curved surfaces, and one initial curved surface in the first initial system corresponds to one curved surface in the hybrid surface optical system to be designed, and select different apertures from different fields of view K characteristic rays;

[0029] S2: Solve a spherical optical system on the basis of the first initial system, specifically, define a spherical surface to be obtained in the spherical optical system as a spherical surface a, keep the multiple initial curved surfaces unchanged, and solve K point by...

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Abstract

A hybrid surface off-axis three-mirror optical system, comprising: a primary mirror, a secondary mirror, three mirrors, and an image sensor, defining a first three-dimensional Cartesian coordinate system in space (x 1 ,y 1 ,z 1 ), relative to the first three-dimensional Cartesian coordinate system (x 1 ,y 1 ,z 1 ), define a second three-dimensional Cartesian coordinate system (x 2 ,y 2 ,z 2 ); define a third three-dimensional Cartesian coordinate system (x 3 ,y 3 ,z 3 ); Define a fourth three-dimensional Cartesian coordinate system (x with the space where the three mirrors are located 4 ,y 5 ,z 4 ); in the second three-dimensional Cartesian coordinate system (x 2 ,y 2 ,z 2 ), the reflective surface of the primary mirror is a 6-time x 2 the y 2 Polynomial free-form surface; in the third three-dimensional Cartesian coordinate system (x 3 ,y 3 ,z 3 ), the reflective surface of the secondary mirror is a 6-time x 3 the y 3 Aspherical surface; in the fourth three-dimensional Cartesian coordinate system (x 4 ,y 4 ,z 4 ), the reflecting surface of the three mirrors is a x 4 the y 4 sphere.

Description

technical field [0001] The invention relates to the field of optics, in particular to a hybrid surface off-axis three-mirror optical system with a large field of view and a small F number. Background technique [0002] In the case of meeting the performance requirements of the optical system, using simple curved surfaces such as spherical and aspheric surfaces instead of complex curved surfaces such as free-form surfaces to design optical systems can reduce the cost and difficulty of processing and testing. Each surface of the hybrid surface optical system can have different options, such as spherical, aspherical and free-form surfaces. Therefore, the cost of the hybrid surface optical system is lower than that of the free-form surface optical system, and the difficulty of processing and detection is small. [0003] However, there are few types of existing hybrid surface optical systems, and they are mainly suitable for small viewing angles and large F-number fields of view....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B17/06
CPCG02B17/0636G02B17/0621G02B17/0642G02B27/0012
Inventor 朱钧龚桐桐金国藩范守善
Owner TSINGHUA UNIV
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