Abstract
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.
© 2010 Optical Society of America
Full Article | PDF ArticleMore Like This
Bhargab Das and Chandra S. Yelleswarapu
Opt. Lett. 35(20) 3426-3428 (2010)
Cheng-Shan Guo, Qing-Yang Yue, Gong-Xiang Wei, Lei-Lei Lu, and Shu-Juan Yue
Opt. Lett. 33(17) 1945-1947 (2008)
Nitesh Pandey and Bryan Hennelly
Opt. Lett. 35(7) 1076-1078 (2010)