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Method using laser tracker to measure aspherical surface peak curvature radius

A laser tracker and vertex curvature technology, applied in the field of optical testing, can solve problems such as inability to achieve in-situ measurement, and achieve the effects of shortening the production period, widening the measurement range, and reducing the measurement time.

Inactive Publication Date: 2012-06-20
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

The disadvantage is that it is still limited by the size range of the three-coordinate measurement. Usually, the size of the aspheric surface is less than 2 meters. Before the measurement, it is necessary to program the measurement points for the tested part, and the in-situ measurement cannot be realized.

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  • Method using laser tracker to measure aspherical surface peak curvature radius
  • Method using laser tracker to measure aspherical surface peak curvature radius
  • Method using laser tracker to measure aspherical surface peak curvature radius

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Embodiment Construction

[0022] Various details involved in the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the described embodiments are only intended to facilitate the understanding of the present invention, and do not serve as any limitation.

[0023] (1) if figure 1 The flow chart of the method for measuring the radius of curvature of an aspheric surface using a laser tracker is shown. First, a laser tracker should be used to establish an aspheric measurement coordinate system. The measurement coordinate system should make the rotation axis of the aspheric surface coincide with a certain coordinate axis, and the aspheric surface vertex coincides with the axis origin. The establishment of the aspheric measurement coordinate system can provide a reasonable initial value for the subsequent search for the best fitting aspheric surface, and avoid calculation errors. The establishment of the measur...

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Abstract

A method using a laser tracker to measure the aspherical surface peak curvature radius belongs to the technical field of optical testing. The laser tracker is used for acquiring aspherical coordinate according to a specific mode, and the aspherical surface peak curvature radius can be obtained through data processing and optimized search algorithm. The method is a novel method for measuring the aspherical surface peak curvature radius, is suitable for in-place measurement of the aspherical surface peak curvature radius in manufacturing and processing aspherical surfaces and in particular has important application values on measurement of the large-bored-diameter aspherical surface peak curvature radius.

Description

technical field [0001] The invention belongs to the field of optical testing, and relates to a method for measuring the radius of curvature of the apex of an aspheric surface, and is especially suitable for on-line detection of the radius of curvature of the apex of a large-diameter aspheric surface. Background technique [0002] The radius of curvature at the vertex of an aspheric surface is one of the main parameters that determine the imaging quality of an aspheric optical system. Accurate measurement of the radius of curvature at the vertex has important guiding significance for the processing and assembly of optical aspheric surfaces. [0003] In the traditional processing of aspheric optical components, technicians measure the radius of curvature of the apex of the aspheric surface by adding a measuring ring to a dial indicator or a dial gauge. This method is relatively simple, but it can only be roughly measured, and the error is large. It is used in the initial stage...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/255
Inventor 李杰伍凡吴时彬匡龙
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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