US4847490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical code reading device whose laser reading light is transmitted by only one single mode optical fiber
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1987-10-23
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Granted: 1989-07-11
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Expires: 2007-10-23
Abstract
Abstract An optical code reading device comprises a light source and scanning head for projecting light for illuminating a code to be read, only one single mode optical fiber for transferring the light from the light source so that the spot size can be made as small as possible and shape of the light can be a true circle.
Inventors
- 👤 Mitsuru Nishikama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:37
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10712; G06K7/10762; G06K2207/00; G06K2207/1011
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
116 words
An optical code reading device comprising: a laser light source for emitting laser reading light for illuminating a code to be read; only one single mode optical fiber for transferring the reading light from the light source having one end positioned to receive the reading light from the light source; a lens system disposed to receive the reading light projected from the other end of the optical fiber and to project the reading light toward the code; light detecting means for receiving the light reflected from the code and generating an electric signal representing the intensity of the reflected light; and processing means for processing the electric signal to produce an electric signal representing the code.
Claim 2
Dependent Claim
116 words
An optical code reading device comprising: a laser light source for emitting laser reading light for illuminating a code to be read; only one single mode optical fiber for transferring the reading light from the light source having one end positioned to receive the reading light from the light source; a lens system disposed to receive the reading light projected from the other end of the optical fiber and to project the reading light toward the code; light detecting means for receiving the light reflected from the code and generating an electric signal representing the intensity of the reflected light; and processing means for processing the electric signal to produce an electric signal representing the code.
Claim 3
Dependent Claim
35 words
The optical code reading device according to claim 1, wherein said light detecting means and said lens system are disposed in a scanning head and said light source is disposed in a floor type unit.
Claim 4
Dependent Claim
18 words
The optical code reading device according to claim 1, wherein said light source is a semi conductor laser.
Claim 5
Dependent Claim
17 words
The optical code reading device according to claim 1 wherein said light source is a He-Ne laser.
Claim 6
Dependent Claim
18 words
The optical code reading device according to claim 2, wherein said light detecting means is a photo diode.
Claim 7
Dependent Claim
26 words
The optical code reading device according to claim 1, wherein said other end of the optical fiber and lens system are mounted on a rotatable mechanism.
Claim 8
Dependent Claim
230 words
An optical code reading device for use in a code reading device comprising: a laser light source for emitting laser reading light for illuminating a code to be read; only one single mode optical fiber for transferring the reading light from the light source having a first end and a second end, said first end positioned to receive the reading light from the light source; a lens system disposed to receive the reading light projected from the second end of the optical fiber and to project the reading light toward the code; light detecting means for receiving the light reflected from the code and generating an electric signal representing the intensity of the reflected light; processing means for processing the electric signal transferred for producing an electric signal representing the code; an additional light source for projecting visible light for sighting said reading light; and at least one additional optical fiber for transferring the visible light from said additional light source having a first end and a second end, said first end disposed to receive said visible light from said additional light source and said second end disposed adjacent to the second end of said single mode optical fiber so that the visible light can be projected with the reading light toward the code to be read, thereby visually indicating the detecting point on the code by the visible light.
Claim 9
Dependent Claim
230 words
An optical code reading device for use in a code reading device comprising: a laser light source for emitting laser reading light for illuminating a code to be read; only one single mode optical fiber for transferring the reading light from the light source having a first end and a second end, said first end positioned to receive the reading light from the light source; a lens system disposed to receive the reading light projected from the second end of the optical fiber and to project the reading light toward the code; light detecting means for receiving the light reflected from the code and generating an electric signal representing the intensity of the reflected light; processing means for processing the electric signal transferred for producing an electric signal representing the code; an additional light source for projecting visible light for sighting said reading light; and at least one additional optical fiber for transferring the visible light from said additional light source having a first end and a second end, said first end disposed to receive said visible light from said additional light source and said second end disposed adjacent to the second end of said single mode optical fiber so that the visible light can be projected with the reading light toward the code to be read, thereby visually indicating the detecting point on the code by the visible light.
Claim 10
Dependent Claim
58 words
The optical code reading device according to claim 7, wherein a plurality of additional optical fibers for transferring said visible light from said additional light source are disposed around the peripheral portion of the optical fiber of the reading light so that the reading light and visible light can be projected on the code in a coaxial manner.
Claim 11
Dependent Claim
35 words
The optical code reading device according to claim 7, wherein said light detecting means and said lens system are disposed in a scanning head and said light source is disposed in a floor type unit.
Claim 12
Dependent Claim
22 words
The optical code reading device according to claim 7, wherein said light source of the reading light is a semi conductor laser.
Claim 13
Dependent Claim
21 words
The optical code reading device according to claim 7 wherein said light source of the reading light is a He-Ne laser.
Claim 14
Dependent Claim
18 words
The optical code reading device according to claim 7, wherein said light detecting means is a photo diode.
Claim 15
Dependent Claim
22 words
The optical code reading device according to claim 7, wherein said light source of the visible light is a light emitting diode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |