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Simultaneous phase-shifting dual-wavelength interferometry based on two-step demodulation algorithm
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DOI：10.1364/OL.39.005375.png)
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A simultaneous phase-shifting dual-wavelength interferometry based on two-step demodulation algorithm is proposed in this Letter. First, two lasers with different wavelengths go through the same inline phase-shifting interference system simultaneously, and a sequence of five frames of simultaneous phase-shifting dual-wavelength interferograms (SPSDWIs) with the special phase shifts are captured by a monochrome CCD. Subsequently, using the subtraction between the first SPSDWI and the other SPSDWI, each wavelength of two frames of single-wavelength interference images (SWIIs) without the background can be achieved. Finally, using two-step demodulation algorithm, the wrapped phase of each single-wavelength can be determined easily and quickly with high accuracy. (C) 2014 Optical Society of America
Keyword:
MULTIWAVELENGTH DIGITAL HOLOGRAPHY
2-WAVELENGTH INTERFEROMETRY
CHROMATIC ABERRATIONS
POLARIZING SEPARATION
MICROSCOPY
TRANSFORM
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IF:
3.3
论文数:
4.0W
被引数:
7.6W
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