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21 February 2020 Generalized phase-shifting color holography
Minwoo Jung, Hosung Jeon, Beomjun Kim, Sungjin Lim, Joonku Hahn
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Proceedings Volume 11306, Practical Holography XXXIV: Displays, Materials, and Applications; 113060K (2020) https://doi.org/10.1117/12.2544640
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
To measure object wave in digital holography, the phase-shifting technique is popular by changing the phase of the reference wave. A piezo actuator (PZT) is usually used as a device to shift the phase. In a case to obtain the phase information of color object with multiple wavelengths, four-step phase-shifting algorithm with quarter wavelength shift is not convenient since the amount of the phase shift is difference according to each wavelength. In this paper, the generalized four-step phase-shifting method is proposed and experimentally verified to obtain color digital hologram using an image sensor with a Bayer pattern for capturing interference pattern shifted phase by one PZT.
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Minwoo Jung, Hosung Jeon, Beomjun Kim, Sungjin Lim, and Joonku Hahn "Generalized phase-shifting color holography", Proc. SPIE 11306, Practical Holography XXXIV: Displays, Materials, and Applications, 113060K (21 February 2020); https://doi.org/10.1117/12.2544640
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KEYWORDS
Phase shifts
Digital holography
Holograms
Holography
Optical filters
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