초록 ▼

The invention provides a low loss liquid crystal modulator for coloring and shaping a light beam wherein liquid crystal light modulators provide continuous variation in color and intensity output by controlled scattering; the liquid crystal light modulators comprise addressable sheets of light-wave-

The invention provides a low loss liquid crystal modulator for coloring and shaping a light beam wherein liquid crystal light modulators provide continuous variation in color and intensity output by controlled scattering; the liquid crystal light modulators comprise addressable sheets of light-wave-length size liquid crystal occlusious in a transparent matrix; the modulators employ nematic liquid crystal exhibiting positive dielectric anisotropy; the modulator is employed in varying and coloring output beams to allow for colored data or video transmission; images produced may vary in time as is required for, e.g., color television; the modulator is employed in color projectors for both data and video projection, for color printing, and for colored stage illumination. Low loss transmission of the modulators provides for bright images which can be viewed under high ambient illumination.

대표청구항 ▼

A low loss color projector operative in a transmissive mode to project colored light comprising: a) first optical means for separating white light into three unpolarized light beams, each beam being a different color; b) first liquid crystal light beam modulating means containing a transmissive poly

A low loss color projector operative in a transmissive mode to project colored light comprising: a) first optical means for separating white light into three unpolarized light beams, each beam being a different color; b) first liquid crystal light beam modulating means containing a transmissive polymer dispersed liquid crystal positioned downstream of said first optical means, said light beam modulating means being operative to scatter unpolarized light in one mode and to transmit unpolarized light in another mode; c) first addressing means for controlling the modulation of light by said light beam modulating means; d) second optical means for recombining said beams into an output beam downstream of said light beam modulating means; e) liquid crystal output beam modulating means containing a transmissive polymer dispersed liquid crystal positioned to receive and modulate said output beam, said output beam modulating means being operative to scatter light in one mode and to transmit light in another mode; f) a second addressing means for selectively controlling the transmission and scattering of light by said output beam modulating means.