Multi-optical-path optical system initial structure searching method based on paraxial aberration theory

A technology of an optical system and a search method, which is applied in the field of quick search of the initial structure of a multi-optical compound optical system, can solve the problems that the focal length allocation and aberration correction of multiple optical paths cannot be realized, and the impact of the initial structure is large, so as to reduce the influence of manual experience and Difficulty in initial structural design, simple and rapid method, and the effect of good axial aberration correction characteristics

Active Publication Date: 2020-09-18
JILIN UNIV
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Problems solved by technology

[0005] The present invention solves the problem that in the design and optimization process of the existing multi-optical path composite optical system, the selected initial structure has a great influence on the subsequent optimization results, and the existing method can only calculate the initial structure of a single system, and cannot realize the multi-optical path Focus allocation and aberration correction, etc., provide a search method for initial structure of multi-path optical system based on paraxial aberration theory

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  • Multi-optical-path optical system initial structure searching method based on paraxial aberration theory
  • Multi-optical-path optical system initial structure searching method based on paraxial aberration theory
  • Multi-optical-path optical system initial structure searching method based on paraxial aberration theory

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specific Embodiment approach 1

[0047] Specific implementation mode 1. Combination Figure 1 to Figure 8 In this embodiment, the search method for the initial structure of a multi-optical optical system based on paraxial aberration theory includes a multi-optical composite optical system, the multi-optical composite optical system is a three-channel multispectral optical system with a common aperture, and its optical structure layout Such as figure 1 shown. It can simultaneously complete visible light imaging, long-wave infrared imaging and lidar detection functions. The optical system is based on the Ritchey-Chretien primary optical system composed of the primary mirror 1 and the secondary mirror 2. In order to ensure the compactness of the system and complete the optical functions with high quality, the system is divided into a front-end catadioptric optical path and a rear-end reflective optical path; The catadioptric light path at the front end is the laser radar light path. The target light is reflect...

specific Embodiment approach 2

[0117] Specific embodiment two, combine Figure 4 to Figure 8 This implementation mode is described. This implementation mode is an example of the method for searching the initial structure of a multi-optical optical system based on the paraxial aberration theory described in the first specific implementation mode:

[0118] The initial structure is solved by MATLAB. The main working parameters of GA are: the number of individuals NIND (Number of individuals) is 100, the maximum genetic algebra MAXGEN (Maximum number of generations) is 300, and the binary digits of variables PRECI (Precision of variables) is 20. Generation gap GGAP=0.9. The reflected optical path is an imaging system, and the catadioptric optical path is a laser receiving system. In terms of aberration correction, the weight of the reflected optical path is slightly greater than that of the catadioptric optical path. The specific variable parameter range is shown in the table:

[0119] Table 1 Optimized varia...

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Abstract

The invention discloses a multi-optical-path optical system initial structure searching method based on a paraxial aberration theory, and relates to the field of optical instruments. The multi-optical-path optical system initial structure searching method solves the problems that influence of a selected initial structure on a subsequent optimization result is great and an existing method can onlycalculate the initial structure of a single system and cannot achieve focal length distribution and aberration correction of a plurality of optical paths in the design and optimization process of an existing multi-optical-path composite optical system, and completes derivation of paraxial aberration formulas of a catadioptric light path and a double-reflecting path by means of the related aberration theory of a main reflector, a thin lens and a parallel flat plate. A multi-optical-path composite optical system target function composed of optical system structure layout constraint conditions, focal power distribution and paraxial aberration is established, and the problem of the optimal solution of an objective function is solved; and quick search of the initial structure is realized. The multi-optical-path optical system initial structure searching method provided by the invention has good on-axis aberration correction property, is reasonable and compact in optical machine structure parameters, and is suitable for establishment and optical optimization of an initial structure of a multi-optical-path multi-focal-length composite optical system.

Description

technical field [0001] The invention relates to the technical field of multi-optical path composite imaging and detection, in particular to a fast search method for the initial structure of a multi-optical path composite optical system based on paraxial aberration theory. Background technique [0002] With the continuous improvement of the demand for comprehensive measurement and detection of multi-spectrum targets, multi-band composite optical systems have gradually become the development trend of long-distance imaging and detection optical systems. The visible light system can provide high-resolution target images and enrich target detail information. The infrared optical system has strong penetrating ability, has good anti-interference ability, and can work all day. Laser has good monochromaticity, strong directivity, strong anti-interference ability, and large information capacity. It is the main means of optical communication and ranging. The multi-band optical system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G06F17/18
CPCG02B27/0012G06F17/18
Inventor 朱杨张刘张若曦宋莹吕雪莹
Owner JILIN UNIV
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