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A system and method for determining the optical axis of an aspheric mirror

A technology of aspheric surface and reflector, which is applied in the direction of testing optical performance, etc., and can solve the problems of complex building system and low precision of optical axis

Inactive Publication Date: 2014-10-15
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] In order to solve the existing problems of low precision in determining the optical axis of an aspheric mirror, complex building systems, and mirror surface protection, the present invention provides a system and method for determining the optical axis of an aspheric mirror

Method used

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  • A system and method for determining the optical axis of an aspheric mirror
  • A system and method for determining the optical axis of an aspheric mirror
  • A system and method for determining the optical axis of an aspheric mirror

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Embodiment

[0053] When the cross-section of the aspheric reflector is an ellipse, the light source is a point light source:

[0054] 1. Use the self-collimation method to determine the approximate center of the sphere of the aspheric mirror; through the first inner focusing and centering device, the light emitted by the aspheric mirror is reflected and converged at one point, which is the approximate center of the sphere, and then the image is approximated by the first inner focusing and centering device The reception forms an approximate spherical center image.

[0055] 2. When the cross-section of the aspheric reflector is an ellipsoid, the light source is a point light source, such as Figure 5 As shown, the first internal focusing and centering device can also be used as a light source, and the first centering device can be moved to the known focal point F1 of the ellipsoidal aspheric mirror, and the emitted light will converge to the on-axis focal point F2 through the aspheric mirro...

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Abstract

The invention relates to a system and a method for determining an optical axis of a non-spherical reflector. The system for determining the optical axis of the non-spherical reflector comprises a mechanical rotating shaft, an attitude regulating tool, a reflector frame, a luminous source, a first inner focusing centrescope and a second inner focusing centrescope. The luminous source is arranged at the position of a known focus of the non-spherical reflector; the attitude regulating tool is arranged on the mechanical rotating shaft; the reflector frame is arranged at one end of the attitude regulating tool; the first inner focusing centrescope is arranged at the position of which the radius is greater than that of the non-spherical reflector; and the second inner focusing centrescope is positioned on a light path formed by light which is emitted by the luminous source from the known focus of the non-spherical reflector and is reflected by an aspheric surface. The invention solves the problems of low accuracy, complex construction system, reflector surface protection and the like of the existing system and method for determining the optical axis of the non-spherical reflector; an optical non-contact measurement mode is completely adopted to search an approximate sphere center image of the non-spherical reflector and a focus image on the axis; the space attitude of the reflector is changed by the attitude regulating tool; the jumping quantities of two image points in the inner focusing centrescopes are controlled; and the coinciding accuracy of the optical axis and the mechanical rotating shaft is ensured.

Description

technical field [0001] The invention belongs to the field of optical centering, in particular to a system and method for determining the optical axis of an aspheric mirror. Background technique [0002] For aspheric mirrors, the symmetry axis of the aspheric surface is the optical axis of the aspheric mirror, such as figure 1 The schematic diagram of the structure of the axisymmetric aspheric mirror is shown, where OO' is the optical axis of the aspheric mirror, and KK' is the mechanical rotation axis. During the installation and adjustment process, due to the influence of human or objective conditions and other factors, the mechanical rotation axis KK' does not coincide with the optical axis OO' of the aspheric mirror. If the aspheric mirror is a part of the optical system, the system The misalignment of the optical axis of the aspheric mirror with the optical axis of the aspheric mirror will lead to a decrease in the imaging quality of the optical system. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
Inventor 付兴张建李志勇刘军鹏杜琛韩娟李华
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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