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Parallel two-step phase-shifting point-diffraction interferometry for microscopy based on a pair of cube beamsplitters |
Optics Express, Vol. 19, Issue 3, pp. 1930-1935 (2011)
http://dx.doi.org/10.1364/OE.19.001930
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Abstract
Parallel two-step phase-shifting point-diffraction interferometry for microscopy based on a pair of cube beamsplitters is proposed. The first 45°-tilted cube beamsplitter splits object wave into two parallel copies: one copy is filtered by a pinhole in its Fourier plane to behave as reference wave, while the other one remains unchanged as object wave. The second cube beamsplitter combines the object and reference waves, and then split them together into two beams. Along with the two beams, two parallel phase-shifting interferograms are obtained in aid of polarization elements. Based on the proposed configuration, slightly-off-axis interferometry for microscopy is performed, which suppresses dc term by subtracting the two phase-shifting holograms from each other. The setup is highly stable due to its common-path configuration, and has been demonstrated to be suitable for measuring moving objects or dynamic processes.
© 2011 OSA
OCIS Codes
(090.2880) Holography : Holographic interferometry
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.3880) Medical optics and biotechnology : Medical and biological imaging
(180.3170) Microscopy : Interference microscopy
ToC Category:
Instrumentation, Measurement, and Metrology
History
Original Manuscript: December 1, 2010
Revised Manuscript: December 31, 2010
Manuscript Accepted: December 31, 2010
Published: January 18, 2011
Virtual Issues
Vol. 6, Iss. 2 Virtual Journal for Biomedical Optics
Citation
Peng Gao, Baoli Yao, Junwei Min, Rongli Guo, Juanjuan Zheng, Tong Ye, Irina Harder, Vanusch Nercissian, and Klaus Mantel, "Parallel two-step phase-shifting point-diffraction interferometry for microscopy based on a pair of cube beamsplitters," Opt. Express 19, 1930-1935 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-3-1930
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