| Summary: | 碩士 === 國立屏東科技大學 === 車輛工程系所 === 104 === This thesis mainly studies the phenomenon of refraction of a light beam into a prism. At first, this study developed a prism model based on known angles and lengths. Then, Lighttools, an optical simulation software, was used to simulate situations when a light beam enters the prism at different angles. Based on the simulation results, the changes in the light path and beam ratio were investigated with respect to the angle of light incidence. Once the relationship between the prism model and the angle of light incidence was known, the angles of the prism were changed to build more different prism models. Through the combinations of different prism models and angles of light incidence, more comprehensive data could be collected. Not only did this thesis change the shape of the prism, but also investigated the effect of the refractive index of the prism material. There is an inseparable relationship between the angle of light incidence and beam ratio. It was found that the greater the angle of light incidence, the larger the beam ratio. This work investigated three prisms of different materials by varying the refractive index of the prism from n = 1.5, 2.0, and 2.5. It has been proven that the change in the refractive index apparently changes the offset angle of the light emitted from the prism. When the refractive index is high, the prism is more likely to cause a decline in the offset angle and prolong the total reflection phenomenon within the prism.
|
|---|
