Full-field and full-range sequential measurement of the slow axis angle and phase retardation of linear birefringent materials

Tsung Chih Yu, Shan Hsu, Thu Hien Pham Thi, Yu Lung Lo

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

A method is proposed for obtaining full-range sequential measurements of the slow axis angle and phase retardation of linear birefringent materials (LBMs) using a full-field heterodyne interferometer with a charge-coupled device (CCD) camera and an image processing algorithm based on a three-frame integrating-bucket method. The dynamic ranges of the principal axis and phase retardation measurements extend from 0° to 180° and from 0° to 360°, respectively. The proposed method not only enables fullrange measurements of the slow axis angle to be obtained, but also allows a decision to be made as to whether the principal axis labeled by the manufacturer is the slow axis or the fast axis. The standard deviations of the slow axis angle and phase retardation measurements are found to be 0: 14° and 0: 27°, respectively. In addition, it is shown that the noises induced by environmental disturbances are reduced by elimination of the dc component of the output light intensity in the image processing algorithm. We also investigate the sensitivity of the measured error caused by the orientation of LBM.

原文English
頁(從 - 到)4568-4576
頁數9
期刊Applied optics
48
發行號23
DOIs
出版狀態Published - 2009 八月 10

All Science Journal Classification (ASJC) codes

  • 原子與分子物理與光學
  • 工程(雜項)
  • 電氣與電子工程

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