Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1977-11-25
1979-12-11
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250223B, 250227, G06K 710
Patent
active
041785169
ABSTRACT:
Apparatus for reading an alphanumeric code molded into the bottom of a glass container. The code characters are sequentially illuminated, and a plurality of images of the illuminated character are formed in a given plane. An optical mask is disposed in a given plane, having thereon at least one character corresponding to each possible character in the code. The mask characters are respectively aligned with one of the plural images and are opposite contrast to the image. The image of the illuminated character is formed on one face of a bundle of small diameter optical fibers, the ends of which are cut in common planes and polished. The image passed by the optical fiber bundle is received by a large diameter lens projecting the image to infinity, and a plurality of small diameter lenses in hollow opaque tubes are interposed between the large diameter lens and the mask to provide the plural images. Provisions for indicating the sequence of the code characters and for manufacturing a suitable optical mask are also disclosed.
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Alberding Gilbert E.
Ball Corporation
Nelms David C.
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