Nonlinear Recording Holography Capable of Doubly Increasing Stress Pattern

摘要

When recording a hologram, we should control the exposure amount which is in nonlinear area of the characteristic curve of complex amplitude transmittance τ ～ exposure H, the hologram can diffract some higher-order diffracted photograph. The amount of diffracted order has something to do with the recording angle between object beam and reference beam, is concerned with the ship of transmission curve. The intensity distribution of the higher - order diffracted beam is modulated by the change of phase difference. If the phase difference increased a time, the number of diffracted fringes also increased a time, it is similar to a fringe multipler, that it is obvious to increase the precision of interferometry. Nonlinear recording of double exposure method is discussed, and the formula of intensity distribution of second order diffracted photography, and experimental results are given.