Two different methods can be used for photoinduced anisotropy in the bacteriordopsin (BR) polymer films. The first method is based on the anisotropic properties of the initial photocycle form bR570, and second method is based on the anisotropic properties of the longest-lived photocycle intermediate M412. The mixed B-M-type photoinduced anisotropy holds much promise for an implementation of the devices capable of controlling light with light. The possibility of the application of BR polymer films for the light polarization modulator with purely optical control, photoanisotropic incoherent-to-incoherent optical conversion with concurrent spatial intensity filtration, and for logical image processing are shown.© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.