Curvature radius measuring method

A technology of curvature radius and measurement method, applied in the field of measurement, can solve the problems of not being able to find an autocollimation image, not suitable for the on-site working environment, and taking a long time

Active Publication Date: 2012-02-15
梁海锋
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Problems solved by technology

The autocollimating microscope method is to aim at the vertex and the center of the sphere of the surface to be measured successively, and obtain the difference between the two aimed geometric positions, which is equal to the radius of curvature of the surface to be measured, although the measurement is non-contact, but During the measurement, it is necessary to find the center of the sphere of the surface to be measured (there is only one center of the sphere, which needs to be accurately placed on the optical axis of the

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[0019] specific implementation plan

[0020] The present invention will be described in detail below with reference to the drawings and embodiments.

[0021] The design principle of the present invention is: the spherical surface to be measured of any optical spherical lens can be considered to be obtained by cutting from a complete spherical surface, so the measurement of the radius of curvature of the spherical surface can be attributed to measuring the spherical radius of the complete spherical surface. ( ) Two known parallel planes (the distance is less than the diameter of the ball) cut the ball, and the intersection line with the surface of the ball forms two circles, through non-contact measurement methods (such as triangulation, laser ranging, optical fiber Displacement sensing distance measurement method, super life distance measurement method, and distance measurement method based on the principle of capacitive transformation) to obtain the radius of the two ...

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Abstract

The invention relates to the technical field of measurement methods, in particular to a curvature radius measuring method. The curvature radius measuring method is not influenced by factory environments such as a vibration environment and the like and belongs to non-contact measurement; and by the method, a surface to be detected cannot be damaged, the requirements of quick large-scale on-site measurement can be met, and the surface curvature radiuses of polished and unpolished parts can be measured at the same time. The curvature radius measuring method provided by the invention comprises the following steps of: cutting a sphere by using two planes between which the distance is (D), wherein the (D) is less than the diameter of the sphere, and two circles are formed by intersecting lines between the two planes and the surface of the sphere; and obtaining the sum of the radiuses of the two circles by a non-contact measurement method, wherein the curvature radius of the surface to be detected is shown as a formula in the specification.

Description

technical field : [0001] The invention relates to the technical field of measurement methods, in particular to a method for measuring the radius of curvature. Background technique [0002] The radius of curvature is the main technical indicator for measuring optical parts. At present, in the field of optical processing, the main methods for testing the radius of curvature of optical parts are divided into two categories: contact method and non-contact method measurement. Among them, contact method measurement methods mainly include spherometers and samples. Two, the spherometer calculates the radius of curvature of the concave or convex surface of the measured part by testing the sagittal height and length of the concave or convex surface of the part. In the measurement process of this method, it is necessary to seek the maximum point / minimum point of the vector height, and the probe needs to slide on the surface of the part, which is likely to cause damage to the surface ...

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Application Information

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IPC IPC(8): G01B11/255G01B7/293
Inventor 梁海锋刘缠牢
Owner 梁海锋
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