光正反方向入射冰洲石Wollaston棱镜分束角的温度效应

为了了解温度变化对光正反方向入射冰洲石晶体Wollaston棱镜分束角的影响,首先明确了棱镜的结构角和晶体中o光、e光的主折射率是决定棱镜分束角的两个因素；然后从温度对这两个因素的影响出发,从理论上对光正反方向入射冰洲石晶体Wollaston棱镜o光、e光分束角的温度效应进行了研究,结果表明：随温度的升高,光正反方向入射时Wollaston棱镜两分束角均在减小,但光正方向入射时o光分束角减小的幅度要比e光大得多,而光反方向入射时e光下降幅度要比o光大得多；总体上光反方向入射要比正方向入射分束角受温度的影响大,实验测试结果与理论分析相吻合.

Influence of Temperature on the Divergence Angles of Calcite Wollaston Prism by Positive and Negative Incidence

The structural angle and main refractive indices are proposed as two key factors to understanding the temperature influence on the divergence angles of calcite Wollaston prism by positive and negative incidence.The influence of temperature on the divergence angles of the calcite crystal Wollaston prism by positive and negative incidence are studied theoretically considered temperature effect of the two factors.The results show that the divergence angles all decrease with increasing temperature both positive and negative incidence,but the divergence angle of o-light decrease more quickly than that of e-light when light is positive incidence,while the divergence angle of e-light decrease more quickly than that of o-light when light is negative incidence; The overall result indicates that temperature influence on the divergence angle by negative incidence is greater than that of positive incidence.The testing system is established to verify the above results,and the experimental result was agreed well with the theoretical analysis.