An optically addressed liquid crystal light valve based on the photoconductive effect of the Bismuth Silicate (BSO) layer is presented. The transmittance of read beam (1 053 nm) through the light valve changes with the intensity of address beam (470 nm) projected onto the BSO layer. Beam shaping for 1 053-nm coherent light by using this device is reported. The device has the advantage of high transmittance and it can overcome the problem of black-matrix effect compared with the traditional thin film transistor (TFT) liquid crystal modulator.