光学玻璃应力双折射检测方法研究

Study of the Stress Birefringence Measurement of Optical Glass

使用高精度数字应力仪测量光学玻璃的应力双折射，给出整体应力分布及大小。实验表明温度及重力对材料／玻璃的应力双折射分布和大小有非常明显的影响，相对初始测量结果，应力双折射最大值减少了83％，均方根（RMS）值减少了87％；且在温度趋于稳定时，重力的作用使得材料应力双折射的最大值增大了68％，RMS值增大了90％。对光学材料／玻璃应力双折射的高精度数字化检测对于光学加工和使用具有重要的指导意义。

Using the high precision digital stress measurement instrument, the distribution of stress birefringence （SBR） of optical glass is digitally measured. Experiment shows that the impact of temperature and gravity on the stress birefringence of glass cannot be neglected, compared to the first measurement result, the max value of SBR reduces 83 %, and the root mean square （RMS） value reduces 87 %. Also, when temperature maintains constant, the effect of gravity is still obvious, experimental result shows that the max value of SBR increases 68%, and the RMS value increases 90% in this situation. The stress birefringence of optical material/glass distribution measurement with high precision has great impact on optical machining.