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Monte Carlo analysis method and system for optical element support parameters

A technology of optical components and parameters, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of not considering the high-order surface distortion of the lens, and achieve the effect of reducing the experimental workload

Active Publication Date: 2013-01-30
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] At present, the optical design usually adopts the Monte Carlo method to carry out the size and position tolerance design of optical components. Most of them regard the lens as a rigid body, without considering the high-order surface distortion of the lens under the random support force in actual assembly, and cannot be used to guide flexible supports. Determination of the Variation Range of the Supporting Force of the Structure

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  • Monte Carlo analysis method and system for optical element support parameters
  • Monte Carlo analysis method and system for optical element support parameters
  • Monte Carlo analysis method and system for optical element support parameters

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[0031] 1. Geometric model for optical components image 3 a, Establish its finite element calculation model in the finite element software, calculate the surface shape change results caused by the self-weight of the component under the increasing number of support points; obtain the change trend of the maximum deformation of the component surface with the increase of the number of support points, and determine the minimum support that meets the surface shape accuracy requirements The number of points is the optimal support point number n of the support system; generally, the support points of large-aperture optical elements include fixed support points and flexible support points, and the flexible support points adopt flexible support structures, such as spring sheets and flexible hinges. Calculate the average gravity of each support point in an ideal state, which is the ideal support force F=mg / n to be provided for the support structure, m is the mass of the component, and g i...

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Abstract

The invention discloses a method for determining optical element support parameters. The method comprises determining the number of the least support points capable of ensuring the surface shape accuracy as the optimum number, and calculating the ideal supporting force of the support points; defining the fluctuation levels of different supporting forces according to the ideal supporting force, calculating the surface shape change of a lens caused by a random supporting force under the different supporting force levels; finding and examining the random distribution rule of the surface shape distortion of the lens, and constructing the mapping relationship between different supporting force levels and the imaging quality of the optical element; and determining the fluctuation range of the supporting force according to the quality control specification. Based on the Monte Carlo method, the random distribution rule of surface shape distortion of the lens under action of a nonuniform supporting force can be analyzed so as to analyze the influence of different random supporting force levels on the imaging quality of the optical element, thereby determining a reasonable supporting force fluctuation range, and providing effective reference data for design, installation and debugging of an optical element support system.

Description

technical field [0001] The invention relates to the field of optical element support system design and adjustment, in particular to a method and system for determining flexible support parameters of optical elements, which is suitable for the design and adjustment of optical lens support systems with large diameter, high resolution, and multi-point flexible support , Tolerance and process design, image quality analysis, can be extended to other types of random load optical system imaging quality analysis and support level determination. Background technique [0002] In order to improve the resolution, astronomical telescopes, space telescopes and photoelectric tracking equipment all need large-diameter optical transmission (reflection) mirrors. In order to meet the high-precision surface shape requirements of optical lenses, multi-point flexible support methods are usually used to reduce the surface distortion of the lens under its own weight. The design of the support syste...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 罗欣沈意平刘远陈学东曾理湛
Owner HUAZHONG UNIV OF SCI & TECH
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