26 February 2018 Pulsed spatial phase-shifting digital shearography based on a micropolarizer camera
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Abstract
We developed a pulsed digital shearography system that utilizes the spatial phase-shifting technique. The system employs a commercial micropolarizer camera and a double pulse laser, which allows for instantaneous phase measurements. The system can measure dynamic deformation of objects as large as 1 m at a 2-m distance during the time between two laser pulses that range from 30  μs to 30 ms. The ability of the system to measure dynamic deformation was demonstrated by obtaining phase wrapped and unwrapped shearograms of a vibrating object.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Vyacheslav Aranchuk, Amit K. Lal, Cecil F. Hess, James Davis Trolinger, Eddie Scott, "Pulsed spatial phase-shifting digital shearography based on a micropolarizer camera," Optical Engineering 57(2), 024109 (26 February 2018). https://doi.org/10.1117/1.OE.57.2.024109 . Submission: Received: 23 November 2017; Accepted: 30 January 2018
Received: 23 November 2017; Accepted: 30 January 2018; Published: 26 February 2018
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