Registers – Coded record sensors – Particular sensor structure
Patent
1994-09-22
1996-04-16
Hajec, Donald T.
Registers
Coded record sensors
Particular sensor structure
25022713, G06K 710
Patent
active
055085040
ABSTRACT:
A laser wand for reading optically encoded indicia has a wand shaped housing for housing a light emitter which for emits a focussed laser light beam having a fixed focal point beyond which said light beam diverges. The light beam is directed towards a surface on which the indicia is disposed. A spacer is also provided for alternatively defining different separation distances between the light emitter and indicia. At a first separation distance, the light beam forms a sensing spot of a first size on the surface on which the indicia is disposed. This sensing spot is effective for reading indicia having a first physical characteristic. At a second separation distance, the light beam forms a sensing spot of a second size, which is larger than the first size, on the surface on which the indicia is disposed. This later sensing spot is effective for reading indicia having a second physical characteristic different from the first physical characteristic. For example, indicia having the first physical characteristic may be of a higher density than indicia having the second physical characteristic.
REFERENCES:
patent: 4180204 (1979-12-01), Keonig et al.
patent: 4251798 (1981-02-01), Swartz et al.
patent: 4263592 (1981-04-01), Takahashi et al.
patent: 4329684 (1982-05-01), Monteath et al.
patent: 4545023 (1985-10-01), Mizzi
patent: 4581761 (1986-04-01), Ichinokawa et al.
patent: 4672215 (1987-06-01), Howard
patent: 4675531 (1987-06-01), Clark et al.
patent: 4748318 (1988-05-01), Bearden et al.
patent: 4806745 (1989-02-01), Oogita
patent: 4816660 (1989-03-01), Swartz et al.
patent: 4906843 (1990-03-01), Jones et al.
patent: 4916308 (1990-04-01), Meadows
patent: 4916441 (1990-04-01), Gombrich
patent: 4916699 (1990-04-01), Ohashi
patent: 4931019 (1990-06-01), Park
patent: 4972496 (1990-11-01), Sklarew
patent: 5021640 (1991-06-01), Muroi
patent: 5047625 (1991-09-01), Iima et al.
patent: 5063508 (1991-11-01), Yamada et al.
patent: 5080456 (1992-01-01), Katz et al.
patent: 5142131 (1992-08-01), Collins, Jr. et al.
patent: 5189291 (1993-02-01), Siemiatkowski
patent: 5300762 (1994-04-01), Roske
patent: 5308964 (1994-05-01), Kubuo
patent: 5331143 (1994-07-01), Marom et al.
patent: 5352922 (1994-10-01), Barkan et al.
IBM Technical Disclosure Bulletin, "Light Shield for Optical Wand", Minov et al., Mar. 1978.
"SDT-New Scanning Data Terminal Supports Both Bar Code Reading and Manual Data Entry." Symbol MSI, .COPYRGT.1989.
Dvorkis Paul
Goren David
Hajec Donald T.
Minh Le Thien
Symbol Technologies Inc.
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