Bar code reader
First Claim
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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.
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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