Method for measuring radius of curvature of lens based on interference of composite vortex light

A compound vortex and radius of curvature technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of decreased measurement accuracy and difficult calibration, and achieve the goal of improving measurement accuracy, improving measurement accuracy, and increasing the number of Effect

Inactive Publication Date: 2019-05-07
SUZHOU UNIV
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Problems solved by technology

[0003] However, the traditional planar light interference Newton ring method is limited by the enlarged field of view when facing high fringe density counting, and it is difficult to calibrate when the counting radius is increased, resulting in a decrease in measurement accuracy

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  • Method for measuring radius of curvature of lens based on interference of composite vortex light
  • Method for measuring radius of curvature of lens based on interference of composite vortex light
  • Method for measuring radius of curvature of lens based on interference of composite vortex light

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] See figure 1 , a method for measuring the radius of curvature of a lens based on compound vortex light interference of the present invention, comprising the following steps:

[0032] S1. Provide incident light, lens, reflective surface and imaging system. The reflective surface is one side of the flat glass. When the incident light is irradiated on the reflective surface, no diffuse reflection occurs. The incident light is on the said reflective surface. Equal-thickness interference occurs on the lens and the reflective surface to produce a Newton ring with vortex nodes, and the imaging system is arranged at the detection surface to observe the Newton ring (when th...

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Abstract

The invention relates to a method for measuring the radius of curvature of a lens based on the interference of a composite vortex light, comprising the following steps: S1, providing incident light, alens, a reflecting surface and an imaging system, wherein the incident light interferes with in the same thickness on the lens and the reflecting surface to generate a Newton ring with a vortex node,and the imaging system is arranged at the detection surface for observing the Newton ring; S2, calculating the radius of curvature of the lens according to the formula R= (ri2-Rj2) / (mi-Mj) lambda, wherein i and j represent the ith and jth nodes respectively, r represents the radius of the vortex node, mi-Mj is the number of stripes between two vortex nodes. By introducing vortex nodes into Newtonring, the method divides the vortex nodes into several segments, so that each segment can be counted separately at high magnification, and the scaling of the magnified stripes in the finite field ofview can be realized, so that the radius of curvature of the lens can be measured conveniently and with high accuracy.

Description

technical field [0001] The invention relates to a method for measuring the radius of curvature of a lens based on compound vortex light interference. Background technique [0002] The optical spherical lens is the main component of the imaging optical system, and the key to its quality is to ensure the accuracy of its radius of curvature during the development process. Newton's ring equal thickness interferometry has always been one of the most important and widely used methods in the measurement of the radius of curvature of optical spherical mirrors. When analyzing Newton's ring interference fringes, the convex surface of the lens is usually tangent to a point with the flat glass, and the And count the fringes generated by the reflected light of the flat glass to obtain the radius of curvature of the convex surface of the lens. Counting from the center to the outside, because the rings near the center of the interference rings are thicker, deformation or some fringes may ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/255
CPCG01B11/2441G01B11/255
Inventor 袁孝成哲高帆张翔熊宝星
Owner SUZHOU UNIV
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