Thick film line modulator

Details Thick film line modulator Thick film line modulator

G - Physics

02

F

345/56

G02F 1/03 (2006.01) G02F 1/29 (2006.01)

Patent

CA 1176742

-1- ABSTRACT OF THE DISCLOSURE A thick film line modulator/scanner (50) for use in an electro- optic line printer (14). A light valve utilizes a thin electro-optic layer (212) with the index of refraction of the layer being higher than the neighboring material so that the light can be guided in it. A laser beam (48) is focused into the layer, the beam expanding sideways so that a sheet of collimated light is provided. This light is affected by an array of electrodes (240, 242), consisting of an extended set of individually addressed metal fingers (240) on one side of the film (212), and a broad electrode (242) on the other side of the film. This broad electrode could also be segmented to the individually addressed electrodes. The light diffracted by this electrode set is reimaged onto the recording medium (14) with the zero order diffracted light blocked out, so that each electrode acts as a light modulator for one picture element on the output.

391761

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