Bar code symbol scanner utilizing monitor photodiode of laser diode package as a photoreceiver
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United States of America Patent
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Aug 3, 1993
Issued Date -
N/A
app pub date -
Nov 1, 1991
filing date -
Apr 18, 1990
priority date (Note) -
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Abstract
An optical reader/scanning system eliminates the need for and the use of a separate system receiver mounted exteriorly of a laser diode package. Instead, a monitor photodiode within the laser diode package is used as the system receiver. A fresnel lens increases the collection efficiency of the monitor photodiode. The fresnel lens may be mounted interiorly or exteriorly of the laser diode package.
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