Acousto-optic image scanner

Details Acousto-optic image scanner Acousto-optic image scanner

1976-08-26

1978-06-06

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358201, 358209, 358 48, 350356, 358 41, 350358, H04N 910, H04N 310, G02F 111, H04N 530

Patent

active

040939766

ABSTRACT:
An acousto-optic image scanner employing pulses of acoustic surface waves which propagate along the length of a piezoelectric crystal performing as a traveling phase grating to diffract a collimated monochromatic light beam which has a spatial light distribution corresponding to the information content of a line of the image. The light beam propagates through the width of the crystal thus providing an extensive electro-optic interaction length for increased diffraction efficiency. The light intensity at a first-order spot is detected to provide a temporal signal representative of the light distribution of an image line. Scanning of colored images can be accomplished by utilizing a chromatic beam and detecting the light at the first-order spots corresponding to the three different wavelengths present in the illuminating beam.

REFERENCES:
patent: 3851951 (1974-12-01), Evelith
patent: 3851951 (1974-12-01), Eveleth
Alippi et al., "Image Scanning Through the Acousto-Optical Effect Produced y Acoustic Surface Waves", Applied Physics Letters, vol. 26, No. 7, Apr. 1, 1975, pp. 357-360.

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