Projection television display utilizing Bragg diffraction cell for producing horizontal scan
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United States of America Patent
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-
Apr 12, 1994
Grant Date -
N/A
app pub date -
Sep 1, 1992
filing date -
Sep 1, 1992
priority date (Note) -
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status (Latency Note)
Importance
Abstract
Apparatus for horizontally scanning an image corresponding to electronic video input information utilizing a Bragg Diffraction cell in which collimated light from a laser directed through the cell is modulated by a real-time fourier transform of a line of video input information, thereby to produce a one line acoustic hologram in the cell which is reconstructed at a infinity as a stationary image corresponding to the horizontal line of video information. Using a suitable lens system, the stationary image is re-imaged at a plane positioned at a fixed distance from the Bragg Diffraction cell. The scanner is useful in image projection systems, in which the horizontal line image is vertically scanned by a galvanometer driven mirror vibrating in synchronism with the vertical blanking interval of the input video.
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Cited Art Landscape
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