21 March 2017 Improved Fourier transform phase measurement method for measuring the quality parameters of an image intensifier
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Abstract
The improved Fourier transform phase measurement method for measuring the quality parameters of an image intensifier is proposed. Two frames of orthogonal sinusoidal gratings—one with the fringe direction at π / 4 and the other one orthogonally at 3 π / 4 —are designed to serve as the projected gratings. While the gratings are projected onto the input port of the measured image intensifier by the spatial light modulator one-by-one, the corresponding deformed patterns on the output port of the measured image intensifier are captured with the CCD camera. The fundamental frequency components of the captured patterns are obtained after Fourier transform and filtering, and the phase caused by the distortion of the measured image intensifier is retrieved successfully by phase unwrapping. The multiple quality parameters of the image intensifier can be obtained by phase-to-distortion matching at the same time effectively. The simulated and experimental results display that the method is feasible and applicable in measuring the quality parameters of image intensifier.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Song Sun, Song Sun, Yiping Cao, Yiping Cao, Yapin Wang, Yapin Wang, Cheng Chen, Cheng Chen, Guangkai Fu, Guangkai Fu, Xingfen Xu, Xingfen Xu, } "Improved Fourier transform phase measurement method for measuring the quality parameters of an image intensifier," Optical Engineering 56(3), 034113 (21 March 2017). https://doi.org/10.1117/1.OE.56.3.034113 . Submission: Received: 1 January 2017; Accepted: 3 March 2017
Received: 1 January 2017; Accepted: 3 March 2017; Published: 21 March 2017
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