玻璃圆锥体的缩束特性

Demagnification characteristics for a beam of glass cone

为了说明玻璃圆锥体的光缩束特性,根据光折射和全反射原理论证了光在玻璃圆锥体中的传输特点和光束缩束原理,利用光线追迹方法模拟了光在玻璃圆锥体中的传输过程及其对光束的变换效果。理论分析和模拟结果显示,当圆锥体的半顶角等于一系列特定值时,垂直圆锥体底面入射的光束经过该圆锥体后仍沿着其入射方向出射,但光束半径减小,且减小的比率与圆锥体的半顶角有关。该玻璃圆锥体用作缩束器时只需此一个元件,结构简单,串连使用时的缩束倍率是原来各自倍率的积。另外,它还可以作为光谱分析工具。

In order to account for the shrinkage characteristics of light beam through a cone glass,the light propagation characteristics and demagnification principle through a glass cone were demonstrated based on the principle of refraction and total reflection of light.The light propagation process and the effect of the light beam transformation through a glass cone were simulated by using the ray tracing method.Theoretical analysis and simulation studies of a glass cone show that when the semiapex angles are equal to a series of special values,the incident beams normal to the bottom surface of a glass cone will exit along its incidence direction,and the radius of light beam decreases.The radius demagnification rate has a relation with the semiapex angle of the cone.Only one component is need when this glass cone is used as a demagnifier which has the advantages of simple structure,low energy-loss and easy fabrication.Used in series,the beam demagnification rate is the product of the independent piece-rate.It can also be used as spectral analysis tools.