基于移相法的光学玻璃应力等倾角全场数字化测量  

Whole-field digital measurement of the stress isoclinic parameter of optical glass based on phase shifting

作　　者：张丽君[1] 沙定国[1] 聂林秋[1] 

机构地区：[1]北京理工大学信息科学技术学院光电工程系,北京100081

出　　处：《光学技术》2004年第2期199-200,203,共3页Optical Technique

摘　　要：提出了一种用四步移相法实现光学玻璃应力等倾角全场数字化测量的方法。用数码相机拍摄椭圆偏振光场转过不同角度时的四幅出射光强图像,根据移相法的原理计算出在0°～90°范围内的等倾角β。通过对具有典型应力分布的光学玻璃进行实验验证表明,计算结果与实际情况相符。A four-step phase shifting method is presented for whole-field digital determination of the stress isoclinic parameter of optical glass. When the ellipse polariscope is wheeled to different angles, four intensity images of the emitted light are captured by digitalcamera. The isoclinic parameter β in the range of 0 to π/2 can be calculated according to the principle of phase shifting. Compared with the experimental result of optical glass with typical stress distribution, the calculated result agrees well with the actual situation.

关 键 词：移相法 应力等倾角 光学玻璃 数字化测量 偏光应力仪 

分 类 号：TH823[机械工程—仪器科学与技术]