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Multichannel Flying Spot Scanner

IP.com Disclosure Number: IPCOM000096778D
Original Publication Date: 1963-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Potter, RJ: AUTHOR

Abstract

The drawings show two methods of doubling the number of images which can be scanned by a flying spot scanner. Such is achieved without increasing the number of lenses and without appreciable increase in the electronic circuitry required.

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Multichannel Flying Spot Scanner

The drawings show two methods of doubling the number of images which can be scanned by a flying spot scanner. Such is achieved without increasing the number of lenses and without appreciable increase in the electronic circuitry required.

Both systems make use of the bi-directional properties of lenses. In the method in the top drawing, two cathode ray tubes CRT, preferably controlled by the same electrical circuits, are employed. Light from the spot of the upper CRT passes through the lenses in a direction to impinge on the photographic or thermoplastic plates in the lower row. The portion of the light passing through these plates is picked up by the photomultiplier tubes PMT in the lower row to give an electronic output. Similarly, the light from the flying spot of the lower CRT passes through the lenses in the opposite direction to impinge on the photographic plates in the upper row. The light passing through these plates is sensed by the upper PMT row.

In the method in the lower drawing, the light from the CRT is collected by a symmetrical lens system composed of two identical halves with parallel light between them. A half silvered mirror is positioned in the middle of the symmetrical system. Part of the parallel light between the two halves passes through this mirror and lens 2 to impinge on plate 1. The light passing through plate 1 is sensed by PMT 1. The part of the light reflected by the half silvered mirror passes throug...