Method for measuring elasticity modulus of optical flat glass by using optical interference method

Abstract

The invention discloses a method for measuring the elasticity modulus of optical flat glass by using an optical interference method. The method is specifically executed according to the following steps of (1) applying stress to the optical flat glass through a screw, displaying the stress measured by a stress sensor through a measurement instrument and recording the magnitude of the stress; (2) keeping the stress in the step (1) invariable, reading the diameter Q of a black spot at the center of a newton ring interference image under the stress through a reading microscope and then calculating the radius r of the black spot; (3) changing the value of the stress through the screw and repeating the steps (1) and (2) to obtain different stresses of the optical flat glass and corresponding diameters Q and radiuses r of the black spot at the center of the newton ring interference image under different stress conditions; and (4) calculating the elasticity modulus E of the optical flat glass. The measurement method is simple, the measurement period of the method is shortened in comparison with that of a traditional method, the measurement application range is expanded; and a lot of material losses are avoided, the measurement repeatability is good and the method can be used for measuring the optical flat glass of a small sample.

Description

technical field [0001] The invention belongs to the technical field of applied optical equipment, and relates to a method for measuring the elastic modulus of optical flat glass by means of light interference. Background technique [0002] Traditional methods for measuring the elastic modulus of optical flat glass include mechanical methods, acoustic methods, and optical methods. The mechanical method is the main method. The traditional method is to apply pressure to the optical flat glass, and the optical flat glass will produce elastic deformation. Measure the distance corresponding to the elastic deformation by some unique methods, and then divide the stress by the strain. The elastic modulus of optical flat glass. The measurement process of the above-mentioned methods is cumbersome, the measurement cycle is very long, and they are all large sample measurements. The measurement process is mainly destructive, which wastes a lot of resources and has poor repeatability. In...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the elastic modulus of optical flat glass by optical interferometry, which solves the problem that the existing measurement method is difficult to measure the elastic modulus of small-sized optical flat glass, and the destructive measurement existing in the measurement method is mainly The problem

Images