Bar code reader
First Claim
Patent Images
1. A bar code reader comprising:
- a semiconductor laser diode having first and second opposite end faces, said laser diode emitting light from the end faces;
an optical waveguide having a first end optically coupled to the first end face of the laser diode; and
a detector for detecting light from the laser diode, said detector having an input optically coupled to the second end face of the laser diode.
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Abstract
A bar code reader comprises a semiconductor laser diode. A first end face of the laser diode is optically coupled to an end of an optical fiber. A second end face of the laser diode is optically coupled to a detector. The bar code is scanned at the free end of the optical fiber. This information is read by the semiconductor laser diode by way of optical feedback.
16 Citations
6 Claims
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1. A bar code reader comprising:
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a semiconductor laser diode having first and second opposite end faces, said laser diode emitting light from the end faces; an optical waveguide having a first end optically coupled to the first end face of the laser diode; and a detector for detecting light from the laser diode, said detector having an input optically coupled to the second end face of the laser diode. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification
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Current AssigneeUS Philips Corporation (Koninklijke Philips N.V.)
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Original AssigneeUS Philips Corporation (Koninklijke Philips N.V.)
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InventorsVan Ruyven, Lodewijk J.
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Primary Examiner(s)TRAFTON, DAVID
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Application NumberUS06/649,635Time in Patent Office895 DaysField of Search372/6, 372/43, 372/42, 235/472, 235/473, 250/568US Class Current235/462.49CPC Class CodesG06K 7/10762 Relative movementG11B 7/13 Optical detectors therefor
