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US4402017A
Expired / Lapsed
US
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Optical scanning system utilizing light-emitting diodes
Assignee: Xerox Corp
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Filing: 1981-09-22
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Granted: 1983-08-30
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Expires: 2001-09-22
Abstract
Abstract A compact optical scanning system is provided to scan the information content of a document and generate electrical signals representative of the information content thereof. A light emitting linear array is used as an illumination source and a linear imaging device is positioned so as to focus the emitted light as a scanning line onto the document. In one embodiment, the document is moved through a scanning zone and light reflected from scanned lines is collected and converted into electrical signals which can be used to control a remote recorder device.
Inventors
- 👤 Hideaki Takei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:50
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/192; H04N1/193
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
An optical scanning system for scanning an original document lying on a transparent substrate and for generating electrical signals representative thereof, the system comprising an optical assembly including a light-emitting linear array spaced apart from, and parallel to said document, means to selectively activate said light emitting array to produce a band of radiation directed towards said document, a linear lens array placed between said light emitting array and document, said lens array adapted to focus said illumination band as a narrow scan line on said document, light detecting means adjacent said substrate to collect reflected light and generate a signal representative of the scanned information, means to produce relative movement between said optical assembly and said document and further including fiber optic guide means positioned between said scanned line and said collector and formed as part of said substrate.
Claim 2
Dependent Claim
140 words
An optical scanning system for scanning an original document lying on a transparent substrate and for generating electrical signals representative thereof, the system comprising an optical assembly including a light-emitting linear array spaced apart from, and parallel to said document, means to selectively activate said light emitting array to produce a band of radiation directed towards said document, a linear lens array placed between said light emitting array and document, said lens array adapted to focus said illumination band as a narrow scan line on said document, light detecting means adjacent said substrate to collect reflected light and generate a signal representative of the scanned information, means to produce relative movement between said optical assembly and said document and further including fiber optic guide means positioned between said scanned line and said collector and formed as part of said substrate.
References Cited (Backward Citations)
US3658407A
Cited
US3610824A
Cited
US3603730A
Cited
US3967893A
Cited
US4112469A
Cited
US4179621A
Cited
US4317137A
Cited
US4321630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |