Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1975-03-14
1976-11-16
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
178 76, 250235, H01J 314
Patent
active
039926230
ABSTRACT:
A folded retro-reflective optical scanner using common major optics for both scanning and reading and achieving a long scan line (8.25 inches) with a short throw distance and little bow. Astigmatic effects in the reading beam are minimized by utilizing only the center portion of the return beam for reading.
REFERENCES:
patent: 3456997 (1969-07-01), Stites et al.
patent: 3520586 (1970-07-01), Bousky
patent: 3746868 (1973-07-01), Plockl
patent: 3790246 (1974-02-01), Pickering
patent: 3797908 (1974-03-01), Ward et al.
patent: 3814495 (1974-06-01), Walter
Costello Matthew J.
Krallinger Robert E.
Rand Ralph
Rhyins Richard W.
Graphic Sciences, Inc.
Green Robert A.
Nelms David C.
Penn William B.
Peterson Kevin R.
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