The standard laser raster output scanner configuration is the flying spot scanner.1 An alternative scanner architecture which employs the spatial modulation capability of the acoustooptic (AO) modulator is the Scophony scanner, named for the system developed at the Scophony Laboratory of London in the 1930s for optical projection of TV images.2 The Scophony scanner when used with a coherent laser light source exhibits a coherent image response, unlike the comparable flying spot scanner.3 The coherent image response implies that the optical phase of any given pixel at the image plane will have a profound influence on the formation of its neighboring pixels. The optical phase in the Scophony scanner is directly controlled by the electronic phase of the AO modulator's drive signal. This coherent response presents opportunities for electronically manipulating the imaging performance of the laser scanner, opportunities which simply do not exist in the flying spot scanner architecture.

© 1984 Optical Society of America

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