Partial spatial coherence effects in digital holographic microscopy with a laser source
Applied Optics, Vol. 43, Issue 5, pp. 1131-1139 (2004)
http://dx.doi.org/10.1364/AO.43.001131
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Abstract
We investigate a digital holographic microscope that permits us to modify the spatial coherence state of the sample illumination by changing the spot size of a laser beam on a rotating ground glass. Out-of-focus planes are refocused by digital holographic reconstruction with numerical implementation of the Kirchhoff-Fresnel integral. The partial coherence nature of the illumination reduces the coherent artifact noise with respect to fully coherent illumination. The investigated configuration allows the spatial coherence state to be changed without modifying the illumination level of the sample. The effect of the coherence state on the digital holographic reconstruction is theoretically and experimentally evaluated. We also show how multiple reflection interferences are limited by the use of reduced spatial coherent illumination.
© 2004 Optical Society of America
OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(030.4280) Coherence and statistical optics : Noise in imaging systems
(090.1760) Holography : Computer holography
(100.6890) Image processing : Three-dimensional image processing
(180.3170) Microscopy : Interference microscopy
Citation
Frank Dubois, Maria-Luisa Novella Requena, Christophe Minetti, Olivier Monnom, and Eric Istasse, "Partial spatial coherence effects in digital holographic microscopy with a laser source," Appl. Opt. 43, 1131-1139 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-5-1131
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