Abstract

A mixture of malachite green and ammonium dichromate has been used to photosensitize gelatin films. When this material is irradiated with polarized light an anisotropy is induced with its optical axis parallel to the electric vector of the incident vibration. After proper development of the material, the parts that showed anisotropy present a change in the refractive index of the gelatin independent of the orientation of the optical axis of the exposed part. On this basis the recording material was used to record interference gratings. When the two coherent recording beams had an angle α = 90° between their relative polarizations, the spatial frequency of the resultant phase grating was twice the one presented when α = 0°.

© 1985 Optical Society of America

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