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阐述了玻璃双折射测量的一般原理和方法，单四分之一波片法测量中的两个关键问题。叙述了新研制的立式双折射仪的结构特点、使用方法、影响测量精度的主要因素。常见的玻璃双折射仪，测量精度可达3nm，但多为卧式，其缺点是玻璃件安置不便，转动寻找主应力方向时，极易倾倒，且试件形状受到限制，温度影响大，杂散光干扰大。作者针对上述不足，设计和试制的立式双折射仪对此作了较大改进。分别用试件在立式和卧式双折射仪上进行了测量比较，证明新仪器性能良好。
The general principles and methods of glass birefringence measurement are described. Two key problems in the measurement of single quarter-wave plate method are described. Describes the structure of the newly developed vertical birefringence instrument, the use of methods, the main factors affecting the measurement accuracy. Common glass birefringence meter, the measurement accuracy of up to 3nm, but mostly horizontal, the disadvantage is the inconvenience of glass parts placed in rotation, looking for the direction of the main stress, easily poured, and the specimen shape is limited, the temperature is large, miscellaneous Astigmatism interference. In response to the above shortcomings, the author designs and prototypes the vertical birefringence meter to make great improvements. Respectively with the specimen in the vertical and horizontal birefringence measurements were compared to prove that the new instrument performance is good.