The study on photoelastic modulator

• Main Authors: Hwang,Te-An, 黃德安
• Other Authors: Jan,Guo-Jen
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/43835215318288248839

碩士 === 國立臺灣大學 === 光電(科學)研究所 === 82 === Spectrocospic ellipsometry is the well-know and powerful optical technique to obtain the optical proerties ,such as dielectric function of metal and semiconductor. In the thesis, we focus our attention on system setup technique. In electronical signal , we successfully divide ac and dc components of signal by buffer and establish signal processing structure . We also use electronic servo amplifier and negative high voltage power supply made by our laboratory to normalize the signal. In optical element , we analysis the photoelastic modulator deviation from ideal by modified models and how to solve it. In final we discuss why the calibration results not equal to the theory and error sources by measureing Si bulk material.