Send to

Choose Destination
See comment in PubMed Commons below
Opt Lett. 2010 Sep 15;35(18):3018-20. doi: 10.1364/OL.35.003018.

Dual wavelength digital holographic Laplacian reconstruction.

Author information

  • 1Communications and Optoelectronic Research Centre, SFI Strategic Research Cluster in Solar Energy Conversion, School of Electrical, Electronic and Mechanical Engineering, College of Engineering, Mathematical and Physical Sciences, University College Dublin, Belfield, Dublin 4, Ireland.


Access to the spatial derivatives of an optical wave field can be used to enhance edge detection, focusing, and holographic imaging. It was recently shown that, by using digital holographic techniques, the Laplacian of an object field can be extracted. Here it is demonstrated that equivalent results can be found using two holograms captured at either two distances or with two appropriately related wavelengths. Experimental and numerical results confirming the theoretical analyses are presented. The proposed two-wavelength-based system requires no mechanical repositioning of the object and is shown to provide superior performance.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Optical Society of America
    Loading ...
    Write to the Help Desk