14 November 2017 Simultaneous phase-shifting Twyman interferometer with a point source array
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Abstract
A simultaneous phase-shifting Twyman interferometer with a point source array is proposed. We use a point source in combination with a grating and select the four ( ± 1 , ± 1 ) diffraction orders to generate a point source array. With this configuration, we can acquire four independent Twyman interferometers. Adjust the offset amounts of each point source to introduce different phase shifts in the interferograms, and realize dynamic measurement. We introduce 0, π / 2 , π , and 3 π / 2 in the interferograms. The initial phase will be exactly retrieved by employing the four-bucket algorithm. The experimental results show the feasibility and precision of the interferometer.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Donghui Zheng, Lei Chen, Yu Ding, Qinyuan Sun, Wenhua Zhu, Jinpeng Li, "Simultaneous phase-shifting Twyman interferometer with a point source array," Optical Engineering 56(11), 115103 (14 November 2017). https://doi.org/10.1117/1.OE.56.11.115103 . Submission: Received: 10 September 2017; Accepted: 31 October 2017
Received: 10 September 2017; Accepted: 31 October 2017; Published: 14 November 2017
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