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Optical Processing by Chemical Diffusion

IP.com Disclosure Number: IPCOM000077537D
Original Publication Date: 1972-Aug-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Davis, JB: AUTHOR [+2]

Abstract

This description relates to a method of optical processing using a scanner of the type including a silicon-detector sensor, wherein some or all of the desired optical processing takes place at the sensor surface. When the spatial characteristics of the information to be sensed are known beforehand, for example, when it is desired to extract a known signal from the input and process it in a known fashion, the sensitivity of the sensing surface may be varied chemically in the diffusion process to provide the desired filtering.

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Optical Processing by Chemical Diffusion

This description relates to a method of optical processing using a scanner of the type including a silicon-detector sensor, wherein some or all of the desired optical processing takes place at the sensor surface. When the spatial characteristics of the information to be sensed are known beforehand, for example, when it is desired to extract a known signal from the input and process it in a known fashion, the sensitivity of the sensing surface may be varied chemically in the diffusion process to provide the desired filtering.

It is specifically noted that both the magnitude and sign of the sensitivity function are altered and/or controlled; hence, the sensor surface diffused to provide alternate (P/N) and (N/P) silicon junctions, wherein the light flux on some portions of the sensor surface may add to the output signal and on other portions, the flux may subtract from the output signal. The result is a convolution of the sensitivity function and the input data.

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