OVER VIEW
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.

FEATURES
● Compact
● Easy computer-controlled electrical writing
● Output image has no pixel structure
● Large amount of phase modulation
● High diffraction efficiency
● Diffraction light noise at LCD greatly reduced

APPLICATIONS
● Flexible laser marker
● Molecular laser scalpel
● Adaptive optics
● E-Commerce