圆柱形光电探测器透镜聚光特性研究

Investigation on focusing performance of cylindrical photoelectric detector lens

运用透镜聚光原理,以光线追迹法建立平行光偏转角α与透镜焦距、光强分布的光学仿真模型,模拟仿真得到随偏转角α的变化焦平面聚焦光斑位置与光强分布图,进一步研究分析光焦斑位置大小变化、焦距长度和光强分布特性.结果表明:平行主光轴的入射光线经透镜后光斑区域集中、光强分布均匀,并且随α的增大,焦斑中心位置偏离主光轴越大,且焦斑区域的光强分布越不均匀.结论为光电探测器设计需要确定圆柱的高度和半径等参数提供了理论参考依据.

Based on principle of optical,Ray tracing method was used to set up model,which contained a parallel light deflection angle alpha and lens focal length and light intensity distribution of optical.In order to simulate the different parallel to the deflection angle of the incident light,to get the focus spot location distribution of light intensity on the focal plane and determining the focal spot position change and the size of the focal length and light intensity distribution of properties further.The results show that the incident light paralleled to the main axis centralized in flare area,uniform intensity distribution,and along with the increase the anger of alpha,the greater the focal spot center location deviated from the main optical axis.and the light intensity distribution of the focal spot area is not uniform,for designing a cylindrical probe need to determine the height of the cylinder and the radius parameter provides reference.