liquid crystal displays and polymer dispersed liquid crystal displays for use in video monitors, TV monitors, computer monitors, head mounted video displays, wearable video displays, video projectors and cell phones; projection screens; video projection displays; video monitors and computer monitors for computer games; TV monitors; computer monitors; transparent liquid crystal displays; transparent polymer dispersed liquid crystal displays; computer hardware and software for use therewith in tracking eye movement; video displays for displaying data using a substantially downward line of sight; transparent liquid crystal displays for overlaying visual data on an external scene; transparent polymer dispersed liquid crystal displays for overlaying visual data on an external scene; symbology displays, namely, liquid crystal displays and polymer dispersed liquid crystal displays for displaying symbolic data; diffractive displays, namely, liquid crystal displays and polymer dispersed liquid crystal displays based on diffiactive optical principles; three dimensional displays, namely, displays for projecting three dimensional volumetric images; stereoscopic displays; auto-stereoscopic displays, namely, screens for used in providing left and right eye perspective images; spatial light modulators; laser displays, namely, liquid crystal displays and polymer dispersed liquid crystal displays using lasers as illumination sources; liquid crystal displays and polymer dispersed liquid crystal displays using light emitting diode bulbs as illumination sources; edge-lit displays, namely, liquid crystal displays and polymer dispersed liquid crystal displays in which illumination is admitted via the edge of the display; eye-tracked displays, namely, liquid crystal displays and polymer dispersed liquid crystal displays in which the displayed data is determined by the direction of gaze of an observer viewing the display; holograms recorded in polymer dispersed liquid crystals; holograms recorded in polymer dispersed liquid crystals for shaping and transmitting light in a variety of applications; electrically switchable holograms recorded in polymer dispersed liquid crystals; holograms recorded in polymer dispersed liquid crystals and illuminated via the edge of the hologram; electrically switchable holograms recorded in polymer dispersed liquid crystals and illuminated via the edge of the hologram; holographic optical lenses; holographic optical mirrors for scientific and technical purposes; holographic optical phase modulators; optical lenses; optical mirrors for scientific and technical purposes; diffractive optical lenses; diffractive optical mirrors for scientific and technical purposes; laser scanners; phase modulators, optical lenses and optical mirrors for reducing speckle in laser displays; projection screens for reducing speckle in laser displays; electrically switchable holograms recorded in polymer dispersed liquid crystals for reducing speckle in laser displays; optical filters; holographic optical filters; dichroic optical filters; optical polarizers; phase modulators; phase retarders