High speed photorefractive image comparator

摘要: A phase conjugate interferometer for combining first and second two dimensional images includes a source of coherent light beam splitter dividing the into transmitted reflected pump beam. divides probe which traverses image transparency transparency. nonlinear optical medium receives beam, with medium, beams being oriented such that self-pumping produces counterpropagating beams, four-wave mixing between phase-conjugated output transparency, The splitter, are portion is by combines to produce combined containing difference intensities transparencies.