Reading apparatus with separate illumination and detection optic

Details Reading apparatus with separate illumination and detection optic Reading apparatus with separate illumination and detection optic

1992-08-18

1994-11-08

Shepperd, John

Registers

Coded record sensors

Particular sensor structure

250569, G06K 710

Patent

active

053629531

ABSTRACT:
An apparatus for reading a bar code symbol with an illumination beam of light. The apparatus includes an integrally formed lens with a first lens surface for transmitting the beam of light toward the bar code symbol along an optical axis and second and third lens surfaces for receiving any of the beam of light that is reflected from the bar code symbol and transmitting the received light along two distinct optical paths to two photodiodes. The two distinct optical paths are separated from each other and not aligned with the optical axis. The configuration of lenses provides an improved depth of field.

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