雙折射外差干涉術之角度量測及定位技術開發;Development of angular displacement measurement and positioning by birefringence heterodyne interferometry

NCU Institutional Repository > 工學院 > 光機電工程研究所 > 博碩士論文 > Item 987654321/65170

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/65170

题名:	雙折射外差干涉術之角度量測及定位技術開發;Development of angular displacement measurement and positioning by birefringence heterodyne interferometry
作者:	陳林裕;Chen,Lin-yu
贡献者:	光機電工程研究所
关键词:	雙折射干涉術;外差干涉術;角度量測;定位系統;birefringence;heterodyne interferometry;angular measurement;position
日期:	2014-08-14
上传时间:	2014-10-15 14:42:29 (UTC+8)
出版者:	國立中央大學
摘要:	本研究利用雙折射外差干涉術開發一種大範圍且具高精度的角度偵測技術，可應用於角度定位系統。P與S偏光通過雙折射晶體時，其相位差變化對入射角極為靈敏。外差干涉儀可精密地擷取兩偏振光的相位變化，以達到量測角度的目的。同時，我們設計一種新穎光路，以稜鏡將光線導入雙折射晶體，可提高相位對於入射角的靈敏度。於此研究中，我們開發了兩套角度量測系統，分別為線偏光系統與旋光系統。兩系統皆為共光程的架構，可有效地降低環境的干擾。根據實驗結果，線偏光系統的解析力為1.2×10-4° (量測範圍: -20°~3°)。旋光系統的解析力為3×10-5° (量測範圍¬:¬¬±2.5×10-3°)。最後我們整合了角度量測、步進驅動與回授控制裝置，完成了角度定位系統。其定位精度可達1×10-3°，定位範圍20°。;The birefringence heterodyne interferometry for the angular measurement and position is presented. The advantage of the instrument is the large measurement range and high resolution. When p- and s-polarized beams pass through a birefringence crystal, the phase difference between these two polarized beams is sensitive to the incident angle. We can determine the angular variation with the heterodyne interferometer which can precisely detect the phase difference between these two polarized beams. Moreover, a new optical path is designed to enhance the sensitivity by means of prism which couples the light to the birefringence crystal. There are two measurement modes in our system, linear and circular polarized modes. The experimental results show that the resolution of linear polarized mode is 1.2×10-4° (measurement range: -20°~3°) and the resolution of circular polarized mode is 3×10-5° (measurement range: ±2.5×10-3°). Besides, we built an angular positioning system with 1×10-3° accuracy and 20° positioning range by means of an angular measurement system, a step motor and a feedback controller.
显示于类别:	[光機電工程研究所 ] 博碩士論文

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	642	检视/开启

在NCUIR中所有的数据项都受到原著作权保护.

社群 sharing

数据加载中.....