Control method of the reference light of a hologram using a genetic algorithm and the hologram recording device

摘要

PROBLEM TO BE SOLVED: To provide technology of compensating deterioration of a reproduced image caused by distortion of interference fringe formed in a hologram recording medium.;SOLUTION: A hologram recording device 1 includes: a wavefront controller 13 for changing a wavefront state of reference light irradiated to a recording medium 12 in which black and white binary image is recorded and reflecting the light; a CCD 24 imaging the reproduced light of the black and white binary image reproduced by the recording medium 12 irradiated with the reflected reference light; and a measurement control device 25. The measurement control device 25 calculates respectively average luminance, standard deviation, and variation coefficient of white and black, calculates respectively Fit indicating difference of average luminance of white and black for square root of sum of square of variation coefficient of white and variation coefficient of black as fitness of the genetic algorithm, and obtains the wave front control signal output to the wavefront controller 13 when calculated Fit is an optimum value by the genetic algorithm as the wavefront control signal compensating distortion of interference fringe of the recording medium 12.;COPYRIGHT: (C)2010,JPO&INPIT