Noncoaxial bar code reader operable without condenser lens

Details Noncoaxial bar code reader operable without condenser lens Noncoaxial bar code reader operable without condenser lens

1996-07-09

1998-08-18

Hajec, Donald T.

Registers

Coded record sensors

Particular sensor structure

235454, 235467, 235470, 250566, G06K 710

Patent

active

057960879

ABSTRACT:
A bar code reader comprises: a laser for projecting light; a polygon mirror for scanning a bar code with light from the laser; a way-in window allowing the reflecting light from the bar code to pass therethrough; and a light receiving surface including a photo diode, for receiving the reflecting light through the way-in window and transforming the reflecting light into an electrical signal, wherein the light receiving surface is formed to take a rectangle corresponding to a shape and a size of the way-in window, the light receiving surface is placed apart from the way-in window, while facing the way-in window, and no condenser lens is provided between the light receiving surface and the way-in window.

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patent: 5559320 (1996-09-01), Loya
patent: 5581068 (1996-12-01), Shepard et al.

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