Retro-reflective scanner with return path free of collection opt

Details Retro-reflective scanner with return path free of collection opt Retro-reflective scanner with return path free of collection opt

1992-06-19

1993-12-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250235, 235467, G06K 710

Patent

active

052723534

ABSTRACT:
Collection optics are eliminated in the return path of a retro-reflective scanner for reading bar code symbols.

REFERENCES:
patent: 4871904 (1989-10-01), Metlitski et al.
patent: 5047617 (1991-09-01), Shepard et al.
patent: 5151580 (1992-09-01), Metlitsky et al.

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