Method and apparatus to optically recognize recorded information

Details Method and apparatus to optically recognize recorded information Method and apparatus to optically recognize recorded information

1977-01-04

1978-09-12

Kilgore, Robert M.

Registers

Coded record sensors

Particular sensor structure

235470, 3401463AG, G06K 710, G06K 900

Patent

active

041140303

ABSTRACT:
A light source and a light responsive sensor are optically coupled to recognize information such as bar codes recorded on an object. The light source projects illumination light onto the object and the sensor receives the reflected light the density of which represents the recorded information. The sensor is swept to convert the light density into an image signal which is then passed through a filter. An image signal, the low frequency noise signal component resulting from the fluctuation of the illumination light being excluded therefrom by the filter, is available for recognizing the recorded information precisely.

REFERENCES:
patent: 3599151 (1971-08-01), Harr
patent: 3628031 (1971-12-01), Azure
patent: 3849632 (1974-11-01), Eckert
patent: 3909594 (1975-09-01), Allais
patent: 3927303 (1975-12-01), Wefers

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