Bar code symbol scanner utilizing monitor photodiode of laser di

Details Bar code symbol scanner utilizing monitor photodiode of laser di Bar code symbol scanner utilizing monitor photodiode of laser di

1991-11-01

1993-08-03

Sikes, William L.

Registers

Coded record sensors

Particular sensor structure

235472, 235454, 235455, G06K 710

Patent

active

052331709

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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