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Fiber Optics Flying Spot Scanner

IP.com Disclosure Number: IPCOM000079063D
Original Publication Date: 1973-Apr-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Luderus, FJD: AUTHOR

Abstract

The figure shows the principle of a fiber optics flying-spot scanner for document reading.

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Fiber Optics Flying Spot Scanner

The figure shows the principle of a fiber optics flying-spot scanner for document reading.

A light beam from light source 1, passing lens system 2, falls upon disk 3, which is provided with a number of equally spaced slots 4, arranged in a circle. Rotation of disk 3 by motor 5 causes light to pass through slots 4 and a second lens system 6, resulting in a bar-shaped light beam travelling along the ends of an optical fiber bundle 7.

The bar width of the bar-shaped light beam must be smaller than the fiber spacing, in order to illuminate one fiber at a time only, while the pitch of the slots must be larger than the width of the fiber bundle 7, to distinguish between series of the pulses. Light conducted by the successive fibers of bundle 7 is used in optical document reader 8 to scan a document to be read with a flying spot.

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