TY - JOUR
T1 - Snapshot phase-shifting lateral shearing interferometer
AU - Wang, Daodang
AU - Wang, Chao
AU - Tian, Xiaobo
AU - Wu, Heng
AU - Liang, Jian
AU - Liang, Rongguang
N1 - Funding Information:
National Natural Science Foundation of China (NSFC) ( 51775528 , 61805048 ); Guangxi Key Laboratory of Optoelectronic Information Processing ( GD18205 ); National Science Foundation (NSF) ( 1455630 , 1918260 ); National Institutes of Health (NIH) ( S10OD018061 ).
Publisher Copyright:
© 2020
PY - 2020/5
Y1 - 2020/5
N2 - We propose a novel, low-cost snapshot phase-shifting lateral shearing interferometer (SPLSI) with full-range continuously adjustable lateral shear ratio. A tunable shear plate, consisting of a polarizing beam splitter (PBS) plate and a reflective mirror, separates the orthogonally polarization states of the test wavefront into original and sheared wavefronts. The lateral shear ratio can be tuned by adjusting the spacing between PBS plate and the mirror. A pixelated polarization camera simultaneously captures four π/2 phase-shifted interferograms for phase-shifting interferometric measurement. In addition to tunable shear ratio and snapshot capture of phase-shifted interferograms, one more key feature is that SPLSI can measure the wavefront of low-coherence light. The feasibility of the proposed system is demonstrated experimentally. The proposed system provides a simple, compact, and fast way to achieve the instantaneous phase-shifting lateral shearing interferometric testing of wavefronts with minimal impact from environmental disturbance.
AB - We propose a novel, low-cost snapshot phase-shifting lateral shearing interferometer (SPLSI) with full-range continuously adjustable lateral shear ratio. A tunable shear plate, consisting of a polarizing beam splitter (PBS) plate and a reflective mirror, separates the orthogonally polarization states of the test wavefront into original and sheared wavefronts. The lateral shear ratio can be tuned by adjusting the spacing between PBS plate and the mirror. A pixelated polarization camera simultaneously captures four π/2 phase-shifted interferograms for phase-shifting interferometric measurement. In addition to tunable shear ratio and snapshot capture of phase-shifted interferograms, one more key feature is that SPLSI can measure the wavefront of low-coherence light. The feasibility of the proposed system is demonstrated experimentally. The proposed system provides a simple, compact, and fast way to achieve the instantaneous phase-shifting lateral shearing interferometric testing of wavefronts with minimal impact from environmental disturbance.
KW - Adjustable shear ratio
KW - Lateral shearing interferometer
KW - Low-coherence light
KW - Snapshot phase shift
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U2 - 10.1016/j.optlaseng.2020.106032
DO - 10.1016/j.optlaseng.2020.106032
M3 - Article
AN - SCOPUS:85078206272
VL - 128
JO - Optics and Lasers in Engineering
JF - Optics and Lasers in Engineering
SN - 0143-8166
M1 - 106032
ER -