Browse Prior Art Database

Optical Waveguide Links for High Resolution Scanner Applications

IP.com Disclosure Number: IPCOM000082387D
Original Publication Date: 1974-Nov-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 49K

Publishing Venue

IBM

Related People

Heidrich, PF: AUTHOR [+2]

Abstract

A system has been devised for coupling an optical waveguide that conducts optical signals from a document to an array of solid-state scanners. The waveguide and scanner arrays are combined as a single unit.

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Optical Waveguide Links for High Resolution Scanner Applications

A system has been devised for coupling an optical waveguide that conducts optical signals from a document to an array of solid-state scanners. The waveguide and scanner arrays are combined as a single unit.

A document 2, to be read, is located before optical waveguides 4, 4', etc. The information coming from the document 2 appears as optical signals on these waveguides, which signals are sensed by solid-state scanners 6, 6', etc. The structure of Fig. 1 enables the coupling of a linear high-resolution image, such as document 2, into several smaller linear detector arrays. This coupling is accomplished by being able to construct the optical waveguides in a fan-out configuration.

Fig. 2 illustrates one manner for making plural waveguides on a single substrate 8 of glass resting on a base B. Through a conventional masking and etching step, triangular grooves 10 are cut into the glass substrate 8. After such triangular grooves are partially filled with a metal 12, ions are employed to bombard that face of the glass substrate that was grooved. Positive ions of tellurium r sodium are injected into the glass at regions 14 below the surface of the glass 8, but not below metal regions 12. The difference in the index of refraction n between the ion treated portion of the glass 8 and the untreated portion create parallel waveguides of light.

If the index of refraction n of the untreated glass portion is 1.542,...