Patent US4900907A successfully refreshed from Google Patents.
US4900907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical information reading apparatus
Assignee: Denso Corp
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Filing: 1987-03-18
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Granted: 1990-02-13
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Expires: 2007-03-18
Abstract
Abstract A handheld reader for reading optical information such as a bar code contains a reading sensor. An image of the optical information is imaged by light reflected from the optical information, via a reflecting mirror, a lens and a diaphram member, onto the reading sensor so that the image is converted into an electric signal. A pair of LEDs are disposed on both sides of the image sensor so that the images thereof are imaged near the optical information by light from the LEDs through the diaphram member, the lens and the reflecting mirror. The LEDs and reading sensor are controlled so that the LEDs are disabled from emitting light while the reading sensor performs the reading operation of the optical information. Instead of LEDs, optical fibers can be used.
Inventors
- 👤 Takesi Matusima
- 👤 Atutosi Okamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:49
CPC Classifications
G; G06; G06V; G06V10/00; G06V10/88; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10881; G06K2207/00; G06K2207/1018
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
124 words
Apparatus for reading optically readable information, which reflects light comprising: a casing having an opening for facing optical information; optical means, disposed in said casing, for imaging at a predetermined reading position in said casing an image of optically readable information facing said opening by light reflected therefrom; reading sensor means, disposed at said predetermined reading position and having a light receiving plane, for converting said image into an electrical signal; and light emitting means, positioned in said casing and substantially the same plane as said light receiving plane of said reading sensor means, for emitting light through at least part of said optical means to allow determination of focus of an image of said emitted light near optically readable information facing said opening.
Claim 2
Dependent Claim
124 words
Apparatus for reading optically readable information, which reflects light comprising: a casing having an opening for facing optical information; optical means, disposed in said casing, for imaging at a predetermined reading position in said casing an image of optically readable information facing said opening by light reflected therefrom; reading sensor means, disposed at said predetermined reading position and having a light receiving plane, for converting said image into an electrical signal; and light emitting means, positioned in said casing and substantially the same plane as said light receiving plane of said reading sensor means, for emitting light through at least part of said optical means to allow determination of focus of an image of said emitted light near optically readable information facing said opening.
Claim 3
Dependent Claim
22 words
Apparatus according to claim 1, wherein said light emitting means includes at least one light emitter positioned adjacent said reading sensor means.
Claim 4
Dependent Claim
29 words
Apparatus according to claim 1, wherein said light emitting means comprises a pair of light emitters positioned on both sides of a reading portion of said reading sensor means.
Claim 5
Dependent Claim
31 words
Apparatus according to claim 3, wherein said reading sensor means comprises a one-dimensional image sensor and said pair of light emitters are positioned on a scanning line of said image sensor.
Claim 6
Dependent Claim
13 words
Apparatus according to claim 4, wherein said pair of light emitters are LEDs.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 5, further, comprising means for illuminating said optically readable information when said opening faces said optically readable information.
Claim 8
Dependent Claim
22 words
Apparatus according to claim 1, further comprising means for illuminating said optically readable information when said opening faces said optically readable information.
Claim 9
Dependent Claim
36 words
Apparatus according to claim 7, wherein said light emitting means comprises optical fibers for leading light from said illuminating means and for emitting light from both sides of a reading portion of said reading sensor means.
Claim 10
Dependent Claim
28 words
Apparatus according to claim 8, wherein said reading sensor comprises a one-dimensional image sensor and said optical fibers emits light from a scanning line of said image sensor.
Claim 11
Dependent Claim
35 words
Apparatus according to claim 1, further comprising means for disabling said light emitting means from emitting light at least while said reading sensor means converts said images of said optical information into said electrical signal.
Claim 12
Dependent Claim
30 words
Apparatus according to claim 10, wherein said light emitting means comprises a pair of light emitting parts positioned on both sides of a reading portion of said reading sensor means.
Claim 13
Dependent Claim
32 words
Apparatus according to claim 11, wherein said reading sensor means comprises a one-dimensional image sensor and said pair of light emitting parts are positioned on a scanning line of said image sensor.
Claim 14
Dependent Claim
21 words
Apparatus according to claim 10, further comprising a switch manually operated for starting the converting operation of said reading sensor means.
Claim 15
Dependent Claim
145 words
Apparatus for reading optically readable information, which reflects light comprising: a casing having an opening for facing optical information; optical means, disposed in said casing, for imaging at a predetermined reading position in said casing an image of optically readable information facing said opening by light reflected therefrom; reading sensor means, disposed at said predetermined reading position and having a light receiving plane, for converting said image into an electrical signal; and light emitting means, positioned in said casing on opposite ends of a scanning line of said reading sensor means and on substantially the same plane as said light receiving plane for positioning said image within the said scanning line and for emitting light through at least part of said optical means to allow determination of focus of an image of said emitted light at opposite ends of optically readable information facing said opening.
Claim 16
Dependent Claim
145 words
Apparatus for reading optically readable information, which reflects light comprising: a casing having an opening for facing optical information; optical means, disposed in said casing, for imaging at a predetermined reading position in said casing an image of optically readable information facing said opening by light reflected therefrom; reading sensor means, disposed at said predetermined reading position and having a light receiving plane, for converting said image into an electrical signal; and light emitting means, positioned in said casing on opposite ends of a scanning line of said reading sensor means and on substantially the same plane as said light receiving plane for positioning said image within the said scanning line and for emitting light through at least part of said optical means to allow determination of focus of an image of said emitted light at opposite ends of optically readable information facing said opening.
References Cited (Backward Citations)
US3918028A
Cited
US4210802A
Cited
US4408120A
Cited
US4488678A
Cited
US4528444A
Cited
US4516017A
Cited
US4409470A
Cited
US4538060A
Cited
US4603262A
Cited
JPS60171581A
Cited
US4694182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |