Abstract
Digital holography is a digitized holography, which is very suitable for phase imaging of microstructure object. An off- axis lensless Fourier transform digital holographic system was built and analyzed. The recording and numerical reconstruction of digital hologram was discussed. The model of phase aberration in numerical reconstruction of wavefront was presented. Experimental investigations were performed for a USAF test target. The accurate phase image was obtained by combining an automatic phase aberration compensation procedure and manual adjustment process. The lateral resolution of approaching to the theoretical limit was achieved experimentally. Also, the height profiles of the test target was obtained and given.
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