Digital Holographic Phase Reconstruction Technology Based On Hilbert Transform

Digital holography recording a hologram optical device by means of CCD, etc.,and then imaged by a computer simulation of optical diffraction, and calculate all theinformation required for the phase objects of people and the like. It is a new type ofimaging technology and micro-biological shape measurement to achieve a fast ofdigitization and digital holographic whole operation. Because the digital holographicrecording the phase information of three-dimensional information of theobject surface, through thedigital reconstruction of phase extraction and calculationof imagemorphology information, which can get the three-dimensional object.Therefore,the digital holography reconstruction process is carried out in the phase ofreconstruction phase high-precision technology research and optimization is animportant part of near real-time phase reproduction.This paper, based on digital holographic theory, studies Hilbert transformalgorithm, and gives the phase reconstruction method specific object, and then carriesout computer simulations to verify the Hilbert transform reconstruction feasibility of thealgorithm, and finally applies the method into the experiment to verify, the maincontents are:1. Digital holography is anylyzed from recording to the obtainion of the final phase,this paper also describes the current digital holographic reconstruction algorithm someadvantages and problems, and introduces the definition and nature of the Hilberttransform.2. In order to improve the real-time performance and the accuracy ofreconstruction of digital hologram reconstruction algorithm,this paper proposed a kindof digital holographic phase reconstruction technique based on Hilbert transformalgorithm, mainly studies the characteristics of Hilbert transform, and puts forward theconcrete implementation method in reconstruction of digital holographic phase of themethod,computer simulation and experimental verification. In order to reflectthe Hilbert transform algorithm is superior than the conventional Fourier transformmethod. This paper compares the phase information of phase information andthesimulation results obtained by the two methods obtained and analysis, comparisonof standard deviation of the obtained data, the results show that the method is higher than conventional Fourier transform reconstruction accuracy, this result is verymeaningful to improve the accuracy of the reconstruction of the phase.3. The Hilbert transform reconstruction algorithm Bodhisattva conduct phasemeasurements, the experimental study of the Bodhisattva phase measurements, and thenverify that the proposed Hilbert transform algorithm accuracy and real-time value.