TY - GEN
T1 - Imaging polariscope for the characterization of linear birefringence materials in full-scale range of phase retardation and principal axis
AU - Shan, Hsu
AU - Yu, Tsung Chih
AU - Lo, Yu Lung
PY - 2009
Y1 - 2009
N2 - In this paper, heterodyne interferometers designed for sequentially measuring the slow-axis angle and phase retardation of linear birefringent materials (LBM) in full-field and full-range are proposed. By using a complex programmable logic device (CPLD) and a charge-coupled device (CCD), integrating buckets with multiple frames are achieved. The sequentially measuring scheme and the algorithm are designed to achieve full-range measurement. The dynamic range of the principal axis and phase retardation with sequential measurement are from 0° to 180° and 0° to 360°, respectively. The standard deviation of 2-D distributions in principal axis and phase retardation are 0.14° and 0.27°, respectively. Also, the proposing system has the ability to tell the principal axis of LBM is slow or fast axis. The intensity noises induced by environmental disturbance can be reduced by the elimination of the DC component of the output light intensity in the algorithm.
AB - In this paper, heterodyne interferometers designed for sequentially measuring the slow-axis angle and phase retardation of linear birefringent materials (LBM) in full-field and full-range are proposed. By using a complex programmable logic device (CPLD) and a charge-coupled device (CCD), integrating buckets with multiple frames are achieved. The sequentially measuring scheme and the algorithm are designed to achieve full-range measurement. The dynamic range of the principal axis and phase retardation with sequential measurement are from 0° to 180° and 0° to 360°, respectively. The standard deviation of 2-D distributions in principal axis and phase retardation are 0.14° and 0.27°, respectively. Also, the proposing system has the ability to tell the principal axis of LBM is slow or fast axis. The intensity noises induced by environmental disturbance can be reduced by the elimination of the DC component of the output light intensity in the algorithm.
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M3 - Conference contribution
AN - SCOPUS:72849128961
SN - 9781615671892
SN - 9781615671892
T3 - Society for Experimental Mechanics - SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2009
SP - 1467
EP - 1476
BT - Society for Experimental Mechanics - SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2009
T2 - SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2009
Y2 - 1 June 2009 through 4 June 2009
ER -