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.
出处
《光学技术》
EI
CAS
CSCD
2004年第2期199-200,203,共3页
Optical Technique
