The PPM or Programmable Phase Modulator is an electrically-addressed phase modulator using an optical image transmitting element to couple an optically-addressed PAL-SLM (Parallel Aligned Nematic Liquid Crystal Spatial Light Modulator) with an electricallyaddressed intensity modulator. Conventional optically-addressed phase modulators are difficult to control by computer, while electrically-addressed phase modulators have the drawback that unwanted diffraction light is generated due to the pixel structure in the electrical signal input section and that light utilization efficiency is low because of a small fill factor. The PPM uses an LCD to allow computer control and also employs a newly developed optical system to eliminate diffraction noise originating from the LCD pixel structure. This unique configuration allows easy computer-controlled pixel manipulation yet produces images with no pixel. The PPM also allows optical information processing using optical diffraction with large phase modulation characteristics and spatial Fourier optics. Two PPM models, X8077 and X8267, are now available. The X8077 incorporates a compact LD (laser diode) module as the light source for image input from a VGA type LCD, and has a FOP (fiber optic plate) as the optical transmitting element. The X8267 also incorporates a compact LD module but uses a XGA type LCD coupled with an optical lens. The readout light, modulation level and response speed can be optimized to meet your particular needs. The previous model X7550 using a conventional VGA type LCD coupled with an optical lens and the L8279 laser module are also available.