Registers – Coded record sensors – Particular sensor structure
Patent
1993-07-28
1994-05-03
Sikes, William L.
Registers
Coded record sensors
Particular sensor structure
235462, 235472, G06K 710, G06K 704
Patent
active
053089626
ABSTRACT:
A scanner is provided for reading a target containing indicia, such as bar codes, which includes a means for directing the a light source so that it illuminates a target, a photodetector that generates an electrical signal indicative of the intensity of the detected light, a means for decoding the electrical signal to identify the presence of a target containing a region of relatively high reflectivity, and a means for modifying the level of illumination of the light source either from low to high upon recognition of said region of relatively high reflectivity or from high to low when some predetermined condition, such as the end of the indicia scan, or the passage of a time period without reading indicia, is met.
REFERENCES:
patent: 3925639 (1975-12-01), Hester
patent: 3946241 (1976-03-01), Malinowski
patent: 4072859 (1978-02-01), McWaters
patent: 4143358 (1979-03-01), Neff
patent: 4240064 (1980-02-01), Devchoudhury
patent: 4356389 (1982-10-01), Quirey et al.
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patent: 4743773 (1988-05-01), Katana et al.
patent: 4933538 (1990-06-01), Heimann et al.
Ett et al., "Sensing Reading Readiness for Manual Code Reader," IBM Technical Disclosure Bulletin, vol. 15, No. 1, Jun. 1972 p. 321.
Hammond, Jr. Charles M.
Havens William H.
Longacre Jr. Andrew
Sikes William L.
Tran Toan
Welch Allyn Inc.
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