US3848095A
Expired / Lapsed
US
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Three dimensional electro-optical retrieval system
Assignee: I O Metrics Corp
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Filing: 1972-12-20
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Granted: 1974-11-12
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Expires: 1992-12-20
Abstract
Abstract A system for sensing information located in tracks in various layers of a multi-layered recording media. The desired information is electro-optically tracked in three dimensions to provide a sensing of the information contained in the multilayered recording media.
Inventors
- 👤 P Wohlmut
- 👤 F Neu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:31
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/002; G11B7/0025; G11B7/003; G11B7/004; G11B7/005; G11B7/007; G11B7/08; G11B7/09; G11B7/0945; G11B7/12; G11B7/2403; G11B7/24035; G11B7/24038; G11C; G11C13/00; G11C13/04; G11C13/048
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
159 words
A three dimensional electro-optical retrieval system for retrieval of information from any one of a plurality of layers of a recording media comprising; means for receiving a multi-layered recording media having information on a track on at least one of a plurality of layers; a first adjustable electro-optical system; first means for electro-optically positioning said first adjustable electro-optical system relative to the lateral and normal locations of the desired information; a second adjustable electro-optical system; second means for electro-optically positioning said second adjustable electro-optical system, after a predetermined delay, relative to the lateral and normal locations of the desired information in response to said first means, said second adjustable electro-optical system capable of electro-optically sensing the desired information; and means for driving the desired information location of the recording media in the desired track direction past said first adjustable electro-optical system at a first time and past said second adjustable electro-optical system the predetermined delay after the first time.
Claim 2
Dependent Claim
159 words
A three dimensional electro-optical retrieval system for retrieval of information from any one of a plurality of layers of a recording media comprising; means for receiving a multi-layered recording media having information on a track on at least one of a plurality of layers; a first adjustable electro-optical system; first means for electro-optically positioning said first adjustable electro-optical system relative to the lateral and normal locations of the desired information; a second adjustable electro-optical system; second means for electro-optically positioning said second adjustable electro-optical system, after a predetermined delay, relative to the lateral and normal locations of the desired information in response to said first means, said second adjustable electro-optical system capable of electro-optically sensing the desired information; and means for driving the desired information location of the recording media in the desired track direction past said first adjustable electro-optical system at a first time and past said second adjustable electro-optical system the predetermined delay after the first time.
Claim 3
Dependent Claim
40 words
The system as in claim 1 wherein said first means for electro-optically positioning said first electro-optical system includes means for tracking in the lateral direction and the desired track and means for tracking in the normal direction the desired track.
Claim 4
Dependent Claim
131 words
The system as in claim 2 wherein said means for tracking in the normal direction the desired track includes a split photodetector having a first and second output, a summing amplifier, a video envelope detector, said first and second outputs of said split photodetector connected to inputs to said summing amplifier, on output of said summing amplifier connected to an input of said video envelope detector, an oscillator and a phase detector, said oscillator driving said first adjustable electro-optical system in the normal direction at a predetermined frequency, said oscillator connected to a first input to said phase detector connected to a second input of said phase detector, said phase detector producing a zero output when said second adjustable electro-optical system is in focus in the normal direction on the average.
Claim 5
Dependent Claim
50 words
The system as in claim 2 wherein said means for tracking in the lateral direction the desired track including a light responsive unit, the output of which controls said laterally tracking means, said light responsive unit producing a zero output when the desired information is in the desired lateral location.
Claim 6
Dependent Claim
59 words
The system as in claim 4 wherein said light responsive unit comprises a split photodetector having a first and a second output, and a differential amplifier, the first and second output of said split photodetector being connected as inputs to said differential amplifier, the output of said differential amplifier controlling the lateral position of said first adjustable electro-optical system.
Claim 7
Dependent Claim
26 words
The system as in claim 5 wherein the output of said differential amplifier is further connected through a delay unit to said second adjustable electro-optical system.
Claim 8
Dependent Claim
17 words
The system as in claim 1 wherein said second adjustable electro-optical system includes an electro-optical focusing system.
Claim 9
Dependent Claim
16 words
The system as in claim 1 wherein the mulTi-layered recording media comprises a plurality of discs.
Claim 10
Dependent Claim
42 words
The system as in claim 1 wherein said second adjustable electro-optical system includes a housing and a suitable lens capable of focusing on the desired information, and a cap having a plurality of light responsive diodes therein for sensing the desired information.
Claim 11
Dependent Claim
20 words
The system as in claim 1 wherein said second adjustable electro-optical system is capable of electro-optically retrieving the desired information.
Claim 12
Dependent Claim
23 words
The system as in claim 1 wherein said first and said second means continuously electro-optically position said first and second electro-optical systems respectively.
Claim 13
Dependent Claim
14 words
The system as in claim 1 wherein the desired information includes high frequency information.
Claim 14
Dependent Claim
35 words
The system as in claim 12 further including a lens and a source of radiation for providing radiation through the general area of the desired information thereby providing a data plane object to said lens.
Claim 15
Dependent Claim
13 words
The system as in claim 1 wherein the desired information includes video information.
Claim 16
Dependent Claim
17 words
The system as in claim 1 wherein the recording media has information on more than two layers.
Claim 17
Dependent Claim
13 words
The system as in claim 1 wherein the desired information includes digital information.
Claim 18
Dependent Claim
138 words
A three dimensional electro-optical system for retrieval of information from any one of a plurality of layers of a recording media comprising: means for receiving a multi-layered recording media having information on a track on at least one of a plurality of layers; a first adjustable electro-optical system; first means for electro-optically positioning said first electro-optical system relative to the lateral and normal locations of the desired information; a second adjustable electro-optical system; means for driving said first and second adjustable electro-optical system in the desired track direction of said multi-layered recording media; and second means for electro-optically positioning, after a predetermined delay, said second adjustable electro-optical system relative to the lateral and normal locations of the desired information in response to said first means, said second adjustable electro-optical system being capable of electro-optically sensing the desired information.
Claim 19
Dependent Claim
138 words
A three dimensional electro-optical system for retrieval of information from any one of a plurality of layers of a recording media comprising: means for receiving a multi-layered recording media having information on a track on at least one of a plurality of layers; a first adjustable electro-optical system; first means for electro-optically positioning said first electro-optical system relative to the lateral and normal locations of the desired information; a second adjustable electro-optical system; means for driving said first and second adjustable electro-optical system in the desired track direction of said multi-layered recording media; and second means for electro-optically positioning, after a predetermined delay, said second adjustable electro-optical system relative to the lateral and normal locations of the desired information in response to said first means, said second adjustable electro-optical system being capable of electro-optically sensing the desired information.
Claim 20
Dependent Claim
16 words
The system as in claim 17 wherein said multi-layered recording media comprises a plurality of discs.
Claim 21
Dependent Claim
20 words
The system as in claim 17 wherein said second adjustable electro-optical system is capable of electro-optically displaying the desired information.
Claim 22
Dependent Claim
22 words
The system as in claim 17 wherein said first and second means continuously electro-optically position said first and second electro-optical system respectively.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |