采用激光外差干涉仪测量光学材料光弹特性的研究  

Study of Photoelasticity of Optical Material by Using Laser Heterodyne Interferometer

作　　者：寇戈[1] 

机构地区：[1]南京理工大学电光学院,江苏南京210094

出　　处：《中国激光》2003年第1期68-70,共3页Chinese Journal of Lasers

摘　　要：将外差干涉用于给定光学材料的光弹特性测量领域 ,提出了一种测定光弹性某些参数的新方法 ,并研制了一套气压加载装置用以测量不同应力下的折射率变化情况 ,通过实验给出了应力 折射率关系曲线 ,并对实验结果进行了分析。该方法测试方便 ,装置简单 ,可通过很小应力 (1～ 2个大气压 )获得折射率变化与应力的关系 ,折射率变化的测试精度可达 8 4× 10 - 8。A new method of measuring some parameters of photoclasticity is presented, and the heterodyne interferometry has successfully been applied to the field of photoelasticity of selected optical materials. A device which brings atmosphere to bear on the optical materials has been developed to measure the change of refractive index at different pressures, and the relationship between the given pressure and the corresponding change of refractive index has been obtained through a series of experiments. Also, a careful analysis is given to the results of the experiments. The simple device and the easy method can make the last measuring precision of change of refractive index reach 8.4×10-8 with small stress applied.

关 键 词：外差干涉仪 光弹效应 激光外差干涉术 双折射晶体 折射率 光学材料 

分 类 号：TN244[电子电信—物理电子学] TN247