The use of photorefractive materials such as Bi 12 SiO 20 as dynamic holographic media is
becoming an interesting alternative to that of the current liquid-crystal-based modulators in …

We demonstrate the implementation of an optical intensity correlator using Bi12SiO20 (BSO)
as a dynamic holographic medium. The advantages of this correlator are large tolerance in …

The wavelet transform has found a lot of uses in the field of optics. We present an
experimental realization of employing variant wavelet filters into the object space of a …

We have investigated a real-time photorefractive joint transform correlator (JTC) with a bank
of wavelet filters. In the experimental set-up, a photorefractive crystal BSO has been used as …

We propose and demonstrate the use of wavelet filters for pattern discrimination in a
photorefractive (PR) joint-transform correlator. A PR BaTiO3 crystal has been used to record …

An experimental implementation of a joint transform correlator based on a nondegenerate
four-wave mixing interaction in the photorefractive material bismuth silicon oxide is …

In this work we propose a method to improve the discrimination capability of joint transform
correlators. The technique is mainly developed to apply in photorefractive joint transform …

We report on the investigation of a new compact configuration of an inverted VanderLugt-
type correlator system. The phase of the Fourier transform of the image to be recognized is …

We demonstrate a Vander Lugt type correlator based on photorefractive stoichiometric
LiTaO 3 as the volume holographic material. Accurate correlator output was obtained for …

The optical cross correlation of an image with another image that was spatial-frequency
shifted in one dimension was demonstrated in a photorefractive VanderLugt correlator. The …