Real-Time Ultra-High Resolution Image Projection Display Using Laser-Addressed Liquid Crystal Light Valve.
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A wide screen display enables a number of viewers the simultaneous viewing of rapidly updated data in real time at video rates. A beam of coherent radiation from a laser is modulated at video rates in an acousto-optic modulator. The modulated beam is fed to an X scanner that imparts an acoustooptic displacement of the modulated beam in the X direction. A Y scanner is aligned to receive the X-scanned modulated beam and imparts an acoustooptic reciprocal displacement of the beam so that the video modulated beam is displaced in both the X and Y directions. A liquid crystal light valve is disposed to receive the X and Y displaced modulated beam so that it scans the surface of the light value to stimulate the photosensor layers within. This causes the impression of a replica voltage pattern on a bi-refringent liquid crystal in the valve. A high intensity lamp projects a high intensity incoherent light beam onto the liquid crystal light valve via a polarizing biprism. The acoustooptic modulation X scan and Y scan occur at much higher rates and with greater control than conventional arrangements so that the resolution of two about 2,000 lines at a video rate is possible. The real-time display provides a number of viewers with a more realistic image so that responsive decisions and actions may be taken.
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