Patent US3573471A successfully refreshed from Google Patents.
US3573471A
Expired / Lapsed
US
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Optically encoded disk read out system employing optical fibers
Assignee: Harris Corp
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Filing: 1967-01-09
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Granted: 1971-04-06
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Expires: 1987-01-09
Abstract
Abstract Binary data optically recorded in circular tracks on a rotating member is converted into electrical signals by illuminating a limited area on the member, magnifying the image of the illuminated area and projecting that image onto a fiber optic assembly having optical fibers for each track on the member which route the light information to photoelectric transducers and convert the light information into electrical signals. Both optical and mechanical magnifying means are used to permit high density radial and circumferential packing of the binary data while permitting the use of relatively large but highly sensitive photoelectric transducers.
Inventors
- 👤 Edwin R Kolb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:09
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
An apparatus for converting into electrical signals the digital information stored on a cyclically movable member, said information being optically encoded in discrete separate tracks grouped into bands, said apparatus comprising light source means for each of said bands for directing light onto said member to illuminate a plurality of said discrete separate tracks within their respective band, optical means for magnifying and separating the image of the illuminated discrete tracks from each of said bands, means for receiving the magnified and separated image including a fiber optic means for each of the illuminated tracks of each of said bands, said fiber optic means further separating the light from said discrete tracks in said separate bands while transmitting the light received to a remote location without appreciable loss of the intensity of the light applied thereto, photoelectric transducers for each of said tracks, means terminating said fiber optic means from corresponding tracks in separate bands at a common photoelectric transducer for activating said transducer thereby to produce electrical signals in response to the information carried by said encoded member, and optical shutter means located in the light path of each of said bands to select the band to be read out.
Claim 2
Independent Claim
201 words
An apparatus for converting into electrical signals the digital information stored on a cyclically movable member, said information being optically encoded in discrete separate tracks grouped into bands, said apparatus comprising light source means for each of said bands for directing light onto said member to illuminate a plurality of said discrete separate tracks within their respective band, optical means for magnifying and separating the image of the illuminated discrete tracks from each of said bands, means for receiving the magnified and separated image including a fiber optic means for each of the illuminated tracks of each of said bands, said fiber optic means further separating the light from said discrete tracks in said separate bands while transmitting the light received to a remote location without appreciable loss of the intensity of the light applied thereto, photoelectric transducers for each of said tracks, means terminating said fiber optic means from corresponding tracks in separate bands at a common photoelectric transducer for activating said transducer thereby to produce electrical signals in response to the information carried by said encoded member, and optical shutter means located in the light path of each of said bands to select the band to be read out.
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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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |