Patent US4634876A successfully refreshed from Google Patents.
US4634876A
Expired / Lapsed
US
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Object position detecting apparatus using accumulation type sensor
Assignee: Canon Inc
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Filing: 1984-05-03
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Granted: 1987-01-06
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Expires: 2004-05-03
Abstract
Abstract A device for detecting a position of an object including apparatus for producing a light beam, apparatus for scanningly deflecting the light beam with respect to the object, apparatus for sensing an image of the object resulting from the scan and accumulating information therefrom as an electric signal, apparatus for outputting the signal from the sensing and accumulating apparatus when the scan is complete, and apparatus for detecting the position of the object on the basis of the signal output from the sensing and accumulating apparatus.
Inventors
- 👤 Naoki Ayata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:32
CPC Classifications
G; G03; G03F; G03F9/00; G03F9/70; G03F9/7069
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
An apparatus for detecting a position of an object, comprising: means for producing a light beam; means for scanningly deflecting said beam with respect to the object; means for sensing an image of said object resulting from the scan and accumulating information therefrom as an electric signal; means for outputting said signal from said sensing and accumulating means when the scan is complete; and means for detecting the position of the object on the basis of said signal output from said sensing and accumulating means.
Claim 2
Independent Claim
85 words
An apparatus for detecting a position of an object, comprising: means for producing a light beam; means for scanningly deflecting said beam with respect to the object; means for sensing an image of said object resulting from the scan and accumulating information therefrom as an electric signal; means for outputting said signal from said sensing and accumulating means when the scan is complete; and means for detecting the position of the object on the basis of said signal output from said sensing and accumulating means.
Claim 3
Dependent Claim
26 words
An apparatus according to claim 1, wherein said accumulating and sensing means starts the accumulation of the information in response to the start of the scan.
Claim 4
Dependent Claim
35 words
An apparatus according to claim 1, wherein said outputting means counts the number of scans by said beam, and wherein when the number of scans reaches a predetermined amount, said outputting means outputs said signal.
Claim 5
Dependent Claim
34 words
An apparatus according to claim 1, wherein said detecting means digitalizes the signal output from said accumulating and sensing means and detects the position of the object on the basis of the digital signal.
Claim 6
Dependent Claim
42 words
An apparatus according to claim 1, wherein said accumulating and sensing means further comprises plural sensing elements disposed in an image plane of the object, and wherein said outputting means outputs the signals produced by said sensing elements in a timed series.
Claim 7
Dependent Claim
44 words
An apparatus according to claim 5, wherein said outputting means outputs the signal for each of the sensing elements from said accumulating and sensing means between the time when said deflecting means completes the scan and the time when it starts the next scan.
Claim 8
Dependent Claim
38 words
An apparatus according to claim 6, wherein said detecting means further comprises a converter for digitalizing the signal from each of said sensing elements and a memory for storing the digital signals corresponding to the respective sensing elements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |