US4010364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical scanning system
Assignee: Ricoh Co Ltd
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Filing: 1975-05-29
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Granted: 1977-03-01
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Expires: 1995-05-29
Abstract
Abstract A document to be scanned is placed on a fixed transparent cylindrical platen and a mirror is totatable about the axis of the platen. A linear or single line cathode ray tube is fixed in position to produce a light beam which is reflected from the mirror onto the document and moves along the surface of the document in a main scan direction. A light receiving unit comprising a fibre optic bundle and a photoelectric generator is arranged parallel to the main scan direction to receive the light beam reflected from the document. Drive means are arranged to rotate the mirror and move the receiving unit so that the light beam is displaced in the subscan direction perpendicular to the main scan direction and the receiving unit is moved in synchronism therewith.
Inventors
- 👤 Jyoichi Fuwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:36
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/12; H04N1/126; H04N1/127; H04N1/024; H04N1/028; H04N1/0281; H04N1/06; H04N1/0607; H04N1/113
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
178 words
A scanning system comprising: fixed light beam generating means to produce a light beam and move the light beam along a first linear path; movable reflecting means to reflect the light beam onto a fixed surface to be scanned so that the light beam moves in a second linear path along the surface; elongated light receiving means disposed parallel to the second linear path and closely adjacent to both the surface and the second linear path to receive the light beam reflected from the surface; and drive means to move the reflecting means to displace the light beam in a direction perpendicular to the second linear path and to move the receiving means in synchronism with the movement of the reflecting means so that the receiving means moves in said direction perpendicular to the second linear path at the same speed as the displacement of the light beam in said direction so that the receiving means is maintained closely adjacent to both the surface and the second linear path to receive the light beam reflected from the surface.
Claim 2
Dependent Claim
178 words
A scanning system comprising: fixed light beam generating means to produce a light beam and move the light beam along a first linear path; movable reflecting means to reflect the light beam onto a fixed surface to be scanned so that the light beam moves in a second linear path along the surface; elongated light receiving means disposed parallel to the second linear path and closely adjacent to both the surface and the second linear path to receive the light beam reflected from the surface; and drive means to move the reflecting means to displace the light beam in a direction perpendicular to the second linear path and to move the receiving means in synchronism with the movement of the reflecting means so that the receiving means moves in said direction perpendicular to the second linear path at the same speed as the displacement of the light beam in said direction so that the receiving means is maintained closely adjacent to both the surface and the second linear path to receive the light beam reflected from the surface.
Claim 3
Dependent Claim
23 words
The system of claim 1, in which the drive means rotates the reflecting means about an axis parallel to the second linear path.
Claim 4
Dependent Claim
14 words
The sstem of claim 1, in which the reflecting means comprises a plane mirror.
Claim 5
Dependent Claim
28 words
The system of claim 1, further comprising converging lens means disposed between the beam generating means and the reflecting means to focus the light beam onto the surface.
Claim 6
Dependent Claim
26 words
The system of claim 2, in which the surface is cylindrical and the axis thereof is coincident with the axis about which the reflecting means rotates.
Claim 7
Dependent Claim
17 words
The system of claim 1, in which the beam generating means comprises a linear cathode ray tube.
Claim 8
Dependent Claim
16 words
The system of claim 1, in which the light receiving means comprises a fibre optic bundle.
Claim 9
Dependent Claim
15 words
The sytem of claim 1, in which the light receiving means comprises a photoelectric generator.
Claim 10
Dependent Claim
21 words
The system of claim 4, further comprising fixed reflecting means disposed between the beam generating means and the converging lens means.
References Cited (Backward Citations)
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US3273446A
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US3325594A
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US3758715A
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US3845239A
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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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |