光学玻璃弹性模量的自动化测量方法  

Study on automatic measurement method of elastic modulus for optical glass

作　　者：郭长立[1] 黄璋 GUO Changli;HUANG Zhang(College of Science,Xi’an University of Science and Technology,Xi’an 710600,China)

机构地区：[1]西安科技大学理学院,陕西西安710600

出　　处：《应用光学》2020年第4期868-874,共7页Journal of Applied Optics

基　　金：国家自然科学基金(11804272)。

摘　　要：针对现有光学玻璃弹性模量测量周期长、测量过程复杂等问题,提出了一种利用计算机图像处理技术快速测量小样品光学平板玻璃弹性模量的方法。基于接触力学理论和牛顿环干涉原理推导出测量光学玻璃弹性模量的解析式,利用图像处理技术的优势,通过摄像头拍摄牛顿环干涉图像,设计MFC监控与单张图片拍摄界面程序,自动测量牛顿环干涉图像中心黑斑半径,最后根据光学玻璃弹性模量与牛顿环干涉图像中心黑斑半径及牛顿环中心应力之间的关联关系,实现小样品光学玻璃弹性模量的快速测量。实验结果表明:在应力31.17 N^55.11 N范围内,光学玻璃弹性模量的测量相对误差不超过±8.8%;在应力55.11 N^71.07 N范围内,测量相对误差不超过±16%。In order to solve the problems of long measuring period and complex measurement process of elastic modulus for optical glass, a method of quickly measuring the elastic modulus of small sample optical flat glass by computer image processing technology was proposed. Firstly, based on contact mechanics theory and Newton ring interference principle, the analytical formula for measuring the elastic modulus of optical glass was deduced. Secondly, taking advantage of the image processing technology, the Newton ring interference image was taken by camera, and the interface program of MFC monitoring and single image shooting was designed to automatically measure the center black spot radius of Newton ring interference image. Finally, according to the relationship between the elastic modulus of optical glass, the center black spot radius of Newton ring interference image, and the center stress of Newton ring, the fast measurement of the elastic modulus of small sample optical glass was realized. The experimental results show that the relative error of the elastic modulus for optical glass is no more than ± 8.8% in the range of stress 31.17 N^55.11 N, and± 16% in the range of stress 55.11 N^71.07 N.

关 键 词：应用光学 弹性模量 图像处理 接触力学 牛顿环 

分 类 号：TN206[电子电信—物理电子学] O439[机械工程—光学工程]