US3835249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning light synchronization system
Assignee: International Business Machines Corp
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Filing: 1972-12-26
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Granted: 1974-09-10
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Expires: 1992-12-26
Abstract
Abstract A scanning light synchronization system generates a real time clock, the output signal of which indicates the precise position of a scanning light beam. A collimated light beam is diverted by a multi-faceted rotating mirror in a scanning direction. The scanning light beam is split along two paths by a light diverter: a utilization path and a synchronization path. That portion of the light beam traversing the synchronization path scans an optical grating. That portion of the light beam passing through the grating is thereafter reflected from the surface of an elliptical mirror to a light detection device. The elliptical mirror is positioned so that its first optical foci is located at the diversion point of the scanning mirror and its second optical foci is located at the light detector. The light detector provides an output signal indicating the real time position of the scanning beam traversing the utilization path. This output signal is utilized with stored information to modulate the scanning beam so that the light beam traversing the utilization path creates an image on a light receptive surface. The output of the light detection device is also utilized in conjunction with light reflected from a document surface placed in the utilization path to effect the clocking of information signals obtained from such reflected light.
Inventors
- 👤 A Dattilo
- 👤 D Zegafuse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:40
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/1204; G06K15/1219; G06K15/1209; G06K15/1214; G06V; G06V10/00; G06V10/10; G06V10/12; H; H04; H04N; H04N1/00; H04N1/04; H04N1/047; H04N1/053; H04N1/113; H04N1/1135; H04N2201/00; H04N2201/024; H04N2201/02406; H04N2201/02439; H04N2201/04; H04N2201/047; H04N2201/04701; H04N2201/0471; H04N2201/04734; H04N2201/04744; H04N2201/04746; H04N2201/04753; H04N2201/04758; H04N2201/04767; H04N2201/04794
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
258 words
A light scanning synchronization system comprising: a light source for generating a collimated light beam which traverses a first path; a light diverter positioned along the first path movable for diverting the light beam incident thereon from a diversion point along a scanning path; beam splitting means positioned along the scanning path for diverting the light beam along a utilization scanning path and a synchronization scanning path; a surface to be scanned positioned to intercept said light beam along said utilization scanning path, movement of the light diverter positioning the light beam to scan said surface; an optical system having first and second optical foci and positioned to intercept said light beam along said synchronization scanning path, said first optical foci being located at the diversion point of the light diverter; a light responsive device located at the second optical foci and responsive to light incident thereon for providing an output signal proportional to the light intensity incident thereon; an optical grating located intermediate said beam splitting means and said light responsive device and positioned to intercept said light beam traversing said synchronization scanning path for intensity modulating the light beam in accordance with the position of the light beam along said synchronization scanning path; a data register containing at least one information bit and responsive to the output signal of the light responsive device for gating said at least one information signal therefrom; a light modulator responsive to said data register for modulating said columniated light beam in accordance with the information content of said information bit.
Claim 2
Dependent Claim
258 words
A light scanning synchronization system comprising: a light source for generating a collimated light beam which traverses a first path; a light diverter positioned along the first path movable for diverting the light beam incident thereon from a diversion point along a scanning path; beam splitting means positioned along the scanning path for diverting the light beam along a utilization scanning path and a synchronization scanning path; a surface to be scanned positioned to intercept said light beam along said utilization scanning path, movement of the light diverter positioning the light beam to scan said surface; an optical system having first and second optical foci and positioned to intercept said light beam along said synchronization scanning path, said first optical foci being located at the diversion point of the light diverter; a light responsive device located at the second optical foci and responsive to light incident thereon for providing an output signal proportional to the light intensity incident thereon; an optical grating located intermediate said beam splitting means and said light responsive device and positioned to intercept said light beam traversing said synchronization scanning path for intensity modulating the light beam in accordance with the position of the light beam along said synchronization scanning path; a data register containing at least one information bit and responsive to the output signal of the light responsive device for gating said at least one information signal therefrom; a light modulator responsive to said data register for modulating said columniated light beam in accordance with the information content of said information bit.
Claim 3
Dependent Claim
33 words
The light scanning synchronization system set forth in claim 1 wherein said light diverter comprises a multifaceted rotating mirror and wherein said first foci is located at the surface of said rotating mirror.
Claim 4
Dependent Claim
34 words
The light scanning synchronization system set forth in claim 1 wherein said data register contains a plurality of information bits and wherein said output synchronization signal sequentially gates said information bits from said register.
Claim 5
Dependent Claim
98 words
The light scanning synchronization system set forth in claim 3 wherein said light modulator deflects said columniated light beam in accordance with the information content of the signal gated from said data register and further including light blocking means located intermediate said beam splitting means and said surface to be scanned for blocking said light beam traveling along said utilization scanning path when said modulator deflects said light beam to a first position and positioned in non-blocking relationship with said light beam traversing said utilization scanning path when said modulator deflects said light beam to a second position.
Claim 6
Dependent Claim
30 words
The light scanning synchronization system set forth in claim 4 further including moving means for moving said surface to be scanned in a direction orthogonal to the utilization scanning path.
Claim 7
Dependent Claim
40 words
The light scanning synchronization system set forth in claim 1 wherein said optical system comprises an elliptical reflector and wherein said light responsive device being located at an optical foci of the elliptical reflector and responsive to light reflected therefrom.
Claim 8
Dependent Claim
25 words
The light scanning synchronization system set forth in claim 6 wherein said optical grating is located intermediate said beam splitting means and said elliptical reflector.
Claim 9
Dependent Claim
295 words
A light scanning synchronization system comprising: a light source for generating a columniated light beam which traverses a first path; a light diverter positioned along the first path movable for diverting the light beam incident thereon from a diversion point along a scanning path; beam splitting means positioned along the scanning path for diverting the light beam along a utilization scanning path and a synchronization scanning path; a surface to be scanned positioned to intercept said light beam along said utilization scanning path, movement of the light diverter positioning the light beam to scan said surface; light responsive means responsive to light reflected from said surface for providing an output information signal; a threshhold detector responsive to the output information signal of said light responsive means for providing a binary output signal; an optical system having first and second foci and positioned to intercept said light beam traversing said synchronization scanning path, said first foci being located at the diversion point of the light diverter; a light responsive device located at the second foci and responsive to light incident thereon for providing an output signal proportional to the light intensity incident thereon; an optical grating located intermediate said beam splitting means and said light responsive device and positioned to intercept said light beam traversing said synchronization scanning path for intensity modulating the light beam in accordance with the position of the light beam along said synchronization scanning path; a data register responsive to the binary output signal of said threshhold detector into the output signal of the light responsive device for storing a binary bit of information in accordance with the binary significance of the binary output signal of the threshhold detector at a time determined by the output signal of the light responsive device.
Claim 10
Dependent Claim
295 words
A light scanning synchronization system comprising: a light source for generating a columniated light beam which traverses a first path; a light diverter positioned along the first path movable for diverting the light beam incident thereon from a diversion point along a scanning path; beam splitting means positioned along the scanning path for diverting the light beam along a utilization scanning path and a synchronization scanning path; a surface to be scanned positioned to intercept said light beam along said utilization scanning path, movement of the light diverter positioning the light beam to scan said surface; light responsive means responsive to light reflected from said surface for providing an output information signal; a threshhold detector responsive to the output information signal of said light responsive means for providing a binary output signal; an optical system having first and second foci and positioned to intercept said light beam traversing said synchronization scanning path, said first foci being located at the diversion point of the light diverter; a light responsive device located at the second foci and responsive to light incident thereon for providing an output signal proportional to the light intensity incident thereon; an optical grating located intermediate said beam splitting means and said light responsive device and positioned to intercept said light beam traversing said synchronization scanning path for intensity modulating the light beam in accordance with the position of the light beam along said synchronization scanning path; a data register responsive to the binary output signal of said threshhold detector into the output signal of the light responsive device for storing a binary bit of information in accordance with the binary significance of the binary output signal of the threshhold detector at a time determined by the output signal of the light responsive device.
Claim 11
Dependent Claim
33 words
The light scanning synchronization system set forth in claim 8 wherein said light diverter comprises a multifaceted rotating mirror and wherein said first foci is located at the surface of said rotating mirror.
Claim 12
Dependent Claim
30 words
The light scanning synchronization system set forth in claim 8 further including moving means for moving said surface to be scanned in a direction orthogonal to the utilization scanning path.
Claim 13
Dependent Claim
40 words
The light scanning synchronization system set forth in claim 8 wherein said optical system comprises an elliptical reflector and wherein said light responsive device being located at an optical foci of the elliptical reflector and responsive to light reflected therefrom.
Claim 14
Dependent Claim
25 words
The light scanning synchronization system set forth in claim 11 wherein said optical grating is located intermediate said beam splitting means and said elliptical reflector.
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |