Full-Field Heterodyne Polariscope With An Image Signal Processing Method For Principal Axis And Phase Retardation Measurements
APPLIED OPTICS(2006)
摘要
We develop a heterodyne polariscope for measuring the two-dimensional principal axis and phase retardation in a linear birefringence material using novel three-frame and two-frame integrating-bucket methods and a CCD. By using a complex programmable logic device to provide an external trigger to the CCD, integrating buckets with multiple frames are achieved. The advantages of the proposed three-frame and two-frame integrating-bucket methods include a simpler signal processing algorithm based on fewer frames and the elimination of flyback error caused by a sawtooth modulation signal at higher frequencies. (c) 2006 Optical Society of America.
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关键词
polarimetry,complex programmable logic device,signal processing
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