Ryle, James P.James P.RyleLi, DayanDayanLiSheridan, John T.John T.Sheridan2011-11-292011-11-292010 Optic2010-04-11http://hdl.handle.net/10197/3364Paper presented at Biomedical Optics (BIOMED) Miami, Florida, April 11, 2010We record two holograms using two different illuminating wavelengths. Subtracting these holograms, the resulting reconstruction is an approximation to the second order Laplacian differentiation of the object wave.258054 bytes1072 bytesapplication/pdftext/plainenThis paper was published in Biomedical Optics, OSA Technical Digest and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/abstract.cfm?uri=BIOMED-2010-JMA36. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.Two different illuminating wavelengthsLaplacian operatorDiffractionImaging systemsImage reconstructionConference Publicationhttps://creativecommons.org/licenses/by-nc-sa/1.0/