TEMPORAL HOLOGRAPHIC RESPONSE IN PHOTOCHROMIC POLYMER-FILMS

A photokinetic model for elucidating the holographic recording mechani sm in photochromic polymers is presented. Holographic recording in the visible range by bleaching of precolored material is emphasized. The predictions for three different exposure configurations agree well wit h the experimental responses of holographic gratings recorded in spiro oxazine containing polymer films. The holographic response changes sig nificantly with variations in the exposure configurations, indicating that the thermal and photochemical transformations occur between color less spirooxazine and two stereoisomeric forms of the colored dye.