摘要
将Glan-Thompson棱镜两半块之间的光学胶合层作为一层薄膜,利用薄膜光学理论,考虑反射光的多光束干涉对棱镜透射比的影响并对其进行了分析.通过研究胶合层的厚度以及光学胶折射率对入射光在胶合界面上反射率的影响,得出s偏振光经过Glan-Thompson棱镜后的透射比,结果表明:胶合层的厚度以及光学胶折射率对棱镜的透射比均有影响,且厚度对棱镜透射比的影响呈现周期性变化;而光学胶折射率则对透射比的振荡幅度产生影响.对长度孔径比为3的Glan-Thompson棱镜为例,光学胶折射率为1.510时,棱镜的透射比在92.5%-90.8%之间振荡;光学胶的折射率在接近e光主折射率1.475-1.495之间取值时,棱镜透射比的振荡幅度较小.这一结果对优化Glan-Thompson棱镜的性能是非常重要的.
The cement used in Glan-Thompson prisms can be seen as a layer of thin film. The influence of the cement on the transmission of Glan-Thompson prisms can be analyzed using the knowledge of optical thin film. The influence of thickness and the refractive index of the cement on the reflectance at the cementing surface has been studied in detail. The transmission of s-polarized light out of Glan-Thompson prisms is obtained. The result shows that the thickness and the refractive index of the cementing layer have great influence on the transmission of the prisms, and the influence of the former takes effect periodically. Take the prism whose aspect ratio is 3 as example, let the value of the refractive index of cement be 1. 510, the transmission oscillates in the range of 92.5%-90.8%. If the value of the refractive index of cement approaches the main refractive index of e light, such as the range of 1. 475-1. 495, the amplitude is much smaller. The result is very helpful for optimizing the transmitting performance of Glan-Thompson prisms.
出处
《曲阜师范大学学报（自然科学版）》
CAS
2008年第1期73-75,88,共4页
Journal of Qufu Normal University(Natural Science)
