Registers – Coded record sensors – Particular sensor structure
Patent
1988-11-07
1991-05-14
Levy, Stuart S.
Registers
Coded record sensors
Particular sensor structure
235472, 235470, 350 61, 350 66, G11B 7135, G06K 710
Patent
active
050158317
ABSTRACT:
Miniature scan modules which occupy a volume of less than about 1 cubic inch so as to facilitate installation in any apparatus which requires scanning of a light beam across a target and detection of light reflected from the target. The miniature size of the scan module enables it to be incorporated in various apparatus, such as keyboards or terminals and provide them with the ability to read various symbols, particularly bar codes. The module has at least two printed circuit boards on at least one of which a source of a light beam, such as a laser diode or light emitting diode is mounted and another board which may be fixed in the apparatus in which the module is installed. The boards are interconnected by structure including a flexure which defines a pivot axis for the light source and the board on which it is mounted. The flexure is made up of a plurality of elements which are insulated from each other and provide separate conductive paths for electrical power and signals between the boards. The board on which the light source is mounted is driven to oscillate about the pivot axis, thereby scanning the beam across the target. A photo detector may be mounted on the same board as the source and receives light reflected from the target, as through a collecting lens.
REFERENCES:
patent: 4051529 (1977-09-01), Miyaoka
patent: 4135206 (1979-01-01), Kleuters et al.
patent: 4578571 (1986-03-01), Williams
patent: 4667255 (1987-05-01), Lindberg
patent: 4732440 (1988-03-01), Gadhok
patent: 4782475 (1988-11-01), Chandler
patent: 4797866 (1989-01-01), Yoshikawa
Product Sheets on Vernitron Piezoelectric Materials.
Product Sheet on Bendix Flexural Pivot.
Boles John A.
Eastman Jay M.
Levy Stuart S.
Lukacher Martin
Photographic Sciences Corporation
Weinhardt Robert A.
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