US5691834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra compact scanning system for a wide range of speeds, angles and field depth
Assignee: GEO ACQUISITION CORP
•
Filing: 1997-01-20
•
Granted: 1997-11-25
•
Expires: 2017-01-20
Abstract
Abstract A non-contact light beam scan system small enough to fit into a hand holdable wand, pen or calculator size terminal incorporates a novel scan element which can scan at rates of ten to hundreds of scans per second in one or two dimensions. The device is immune to low frequency vibrations and can scan large angles of 60 degrees or more. Automatic trigger circuitry enables it to be used equally well in hand held or fixed mount applications. The depth of operating range is extended with a novel focal system which is integrated with the light source. The entire scanning system for generating a beam, focusing the beam electronically, scanning the beam, collecting light from a target and converting it into electrical signals, and automatically generating a trigger signal can work with industry standard low or high speed bar code decoders.
Inventors
- 👤 George A. Plesko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:36
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/16; G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; G02B26/101; G02B26/105; G02B26/12; G02B26/121; G02B3/00; G02B3/12; G02B3/14; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10554; G06K7/10594; G06K7/10603; G06K7/10613; G06K7/10633; G06K7/10643; G06K7/10653; G06K7/10673; G06K7/10683; G06K7/10693; G06K7/10712; G06K7/10762; G06K7/10772; G06K7/10792; G06K7/10801; G06K7/10811; G06K7/10821; G06K7/10851; G06K7/10861; G06K7/10871; G06K7/10881; H02K26/00; H02K33/02; H02K33/04; H02K33/06; H02K7/00; H02K7/06; H02K7/065; H03; H03K; H03K17/00; H03K17/94; H03K17/941; H03K17/945; H03K17/955; H03K17/96; H03K17/9627; H03K17/9631; G06K2207/00; G06K2207/1013; G06K2207/1016; G06K2207/1017; H02K2201/00; H02K2201/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
195 words
A light beam scanning system for scanning a target to read information therefrom, said system comprising a scan element for receiving a light beam and directing it toward a target as a scanning beam with an angular oscillatory movement of said beam, said scan element comprising: a coil for carrying electric current, said coil having a coil axis and an opening along said coil axis; a shaft having a shaft axis disposed substantially perpendicular to said coil axis; a magnetic element mounted for rotation about said shaft axis in response to current in said coil and producing a magnetic field oriented generally perpendicular to said shaft axis; a first beam-directing optical element coupled to said magnetic element for rotation therewith about said shaft axis; a ferromagnetic circuit including at least one ferromagnetic element disposed with respect to said magnetic element so as to establish a minimum energy rotational orientation of said magnetic element in which said magnetic field of said magnetic element is oriented generally perpendicular to said coil axis; and a second beam-directing optical element which is cooperative with said first beam-directing optical element to impart a two dimensional scan pattern to the beam.
Claim 2
Dependent Claim
195 words
A light beam scanning system for scanning a target to read information therefrom, said system comprising a scan element for receiving a light beam and directing it toward a target as a scanning beam with an angular oscillatory movement of said beam, said scan element comprising: a coil for carrying electric current, said coil having a coil axis and an opening along said coil axis; a shaft having a shaft axis disposed substantially perpendicular to said coil axis; a magnetic element mounted for rotation about said shaft axis in response to current in said coil and producing a magnetic field oriented generally perpendicular to said shaft axis; a first beam-directing optical element coupled to said magnetic element for rotation therewith about said shaft axis; a ferromagnetic circuit including at least one ferromagnetic element disposed with respect to said magnetic element so as to establish a minimum energy rotational orientation of said magnetic element in which said magnetic field of said magnetic element is oriented generally perpendicular to said coil axis; and a second beam-directing optical element which is cooperative with said first beam-directing optical element to impart a two dimensional scan pattern to the beam.
Claim 3
Dependent Claim
51 words
The system of claim 1, wherein said first beam-directing optical element and said second beam-directing optical element are disposed so that an incident light beam which impinges said first beam-directing optical element and said second beam-directing optical element is directed in a direction which is generally parallel to said incident beam.
Claim 4
Dependent Claim
16 words
The system of claim 1, wherein said two dimensional scan pattern is a raster scan pattern.
References Cited (Backward Citations)
US3840731A
Cited
US4367017A
Cited
US4387297A
Cited
US4387297B1
Cited
US5130520A
Cited
US4758717A
Cited
US4502752A
Cited
US4699447B1
Cited
US4699447A
Cited
US4990808A
Cited
US5097355A
Cited
US5168149A
Cited
US5486944A
Cited
US5610752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-24 | 2001-05-26 | 2001-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-24 | 2005-05-26 | 2005-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-24 | 2009-05-26 | 2009-11-25 | $7700.00 | Window Closed / Lapsed |