给出了在相干匹配滤波系统中利用+,-./01/光折变晶体非线性特性实现图像边缘增强光学相关
模式识别的理论分析和实验结果. 实验中自相关峰半最大值宽度降低了*# 2 …

We present a theoretical investigation of the nonlinear phenomenon of spatial frequency
mixing in photorefractive materials. In particular, we study the kinetics of the second …

A new method to test collimation of laser beam using photorefractive crystal is developed.
The method uses two wave mixing geometry with Bi 12 TiO 20 as the recording medium …

In the paraxial limit the photorefractive response of a cubic gyrotropic crystal with applied
square-wave electric field is considered for the symmetric incidence on a crystal of two plane …

Based on one-center model, the effects of the doping amount and the degrees of reduction
and oxidation on the dynamic range M, the response time and the photorefractive sensitivity …

The maximum cross-polarization gain in cubic photorefractive optically active piezo crystals
is considered. It is shown that values of the maximum gain depend on the polarization angle …

Es bien sabido que una iluminación no-uniforme sobre un cristal fotorrefractivo provoca un
cambio espacialmente inhomogeneo de su birrefringencia. Esos cambios llevan a la …