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Full-link dynamic image quality numerical simulation system and method for aerospace camera optical system

An optical system and dynamic simulation technology, which is applied in the fields of optics, optical components, and electrical digital data processing, can solve problems such as difficult single evaluation and complex constraints, and achieve the goals of improving analysis accuracy, optimizing system structure, and shortening the development cycle. Effect

Inactive Publication Date: 2019-12-20
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to solve the problem that the image quality constraints of existing on-orbit cameras are complex and difficult to single-evaluate, the present invention provides a full-link dynamic image quality numerical simulation system and simulation method for the optical system of aerospace cameras

Method used

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  • Full-link dynamic image quality numerical simulation system and method for aerospace camera optical system
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  • Full-link dynamic image quality numerical simulation system and method for aerospace camera optical system

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specific Embodiment approach 1

[0034] Specific implementation mode 1. Combination figure 1 To illustrate this embodiment, the full-link dynamic image quality numerical simulation system of an aerospace camera optical system includes four parts: a thermal simulation module, a structural simulation module, a dynamic simulation module, and an optical simulation module; the thermal simulation module is used to simulate the working environment of the camera system temperature field distribution, and calculate the structural deformation of the camera components due to environmental changes; the structural simulation module is used to simulate the structural deformation of the camera system caused by the gravity change in orbit; the dynamic simulation module is used to calculate the structural vibration and vibration of the camera system The amount of structural deformation at each moment in the working state of attitude correction movement;

[0035] The calculation results of the thermal simulation module, the st...

specific Embodiment approach 2

[0036] Specific embodiment two, combine Figure 2 to Figure 14 This embodiment is described. This embodiment is the simulation method of the full-link dynamic image quality numerical simulation system of the aerospace camera optical system described in the first embodiment. The method is implemented by the following steps:

[0037] (1) According to the user's index requirements, design the initial system structure of the camera, optimize the optical parameters in the optical system module, and complete the initial optical design. Take the off-axis three-mirror system as an example, such as image 3 As shown in , the distant parallel light is imaged on the detection image plane after passing through the primary mirror, secondary mirror and third mirror;

[0038] (2) Divide the error models of the on-orbit camera into static error and dynamic error. Among them, taking the primary mirror as an example, the static error mainly includes five items: initial design error, mirror su...

specific Embodiment approach 3

[0043] Specific implementation mode three. This implementation mode is an example of the full-link dynamic image quality numerical simulation method of the aerospace camera optical system described in specific implementation mode two: the specific steps are as follows:

[0044] Step 1. Complete the initial optical design;

[0045] According to the user's demand for camera functions, complete the initial structural design of the system, and assign parameters such as optics, mechanics, and electricity; then optimize the initial optical system of the camera to make the initial design parameters of the system meet the index requirements. In this embodiment, an off-axis three-mirror system is taken as an example for illustration. The parallel light at infinity is imaged on the detection focal plane after passing through the primary mirror, the secondary mirror and the third mirror of the system.

[0046] Step 2. Establish an error model;

[0047] Analyze and establish various error ...

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Abstract

The invention discloses a full-link dynamic image quality numerical simulation system and method for an aerospace camera optical system, and relates to the technical field of photoelectric imaging. The method solves a problem that existing on-orbit camera image quality restricting factors are complex and difficult to evaluate singly. The full-link dynamic image quality numerical simulation systemcomprises an optical simulation module, a structure simulation module, a thermal simulation module and a dynamic simulation module. The thermal simulation module is used for simulating the temperaturefield distribution of the camera system in a working environment and calculating the structural deformation of the camera assembly caused by environmental change. The structure simulation module is used for simulating structural deformation caused by in-orbit gravity change of the camera system. The dynamic simulation module is used for calculating the structural deformation of the camera at eachmoment in the system structural vibration and attitude correction motion working state. The optical simulation module simulates the processing surface shape and final image quality calculation of each component of the optical system according to results obtained by the thermal simulation module, the structure simulation module and the dynamic simulation module. The analysis accuracy is further improved, the system development period is shortened, and the manufacturing cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of photoelectric imaging, in particular to a full-link dynamic image quality numerical simulation system and method of an aerospace camera optical system. Background technique [0002] Aerospace cameras have been widely used in fields such as astronomical observation, weather forecast and military reconnaissance. With the continuous escalation of usage requirements, customers' requirements for the imaging field of view and resolution ability of aerospace cameras are constantly increasing, and the developer is also required to shorten the development cycle as much as possible while ensuring the quality of the equipment. The full-link numerical simulation method of aerospace cameras is based on the physical mechanism of on-orbit imaging to calculate the camera imaging quality, which can be used to analyze the impact of each imaging link on image quality. Firstly, the modules at each end of the link are integr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G02B27/00
CPCG02B27/0012
Inventor 班章李晓波杨勋赵阳姜禹希
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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