US5120136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical tape recorder having an acousto-optic device for scanning a radiant energy beam onto a media
Assignee: LASERTAPE SYSTEMS Inc A CORP OF
•
Filing: 1989-09-12
•
Granted: 1992-06-09
•
Expires: 2009-09-12
Abstract
Abstract An apparatus and method for optically recording information on a media. The present invention comprises an optical tape recording system for recording digital information. In the present invention, a Bragg cell, comprising an acousto-optic crystal and a transducer, is used to effect the scanning of a light beam on the media for purposes of recording or reading digital information. Further, position information is recorded on the media to allow accurate tracking of the position of the media under a read/write head of the present invention. In addition, the present invention discloses means for focussing a radiant energy beam on the media comprising a read/write head coupled with a transducer. The read/write head includes a piezoelectric layer which may effect the focussing of the read/write head under the control of a servo mechanism.
Inventors
- 👤 William S. Oakley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:12
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/002; G11B7/003; G11B7/12; G11B7/135; G11B7/1365; G11B7/1369
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
In an optical tape recording system for recording digital information on an optical tape including a light source for producing a light beam and means, optically coupled with said light source, for focussing and directing said light beam at said optical tape, said optical tape including a plurality of tracks for recording said digital information, each of said plurality of tracks comprising at least one row of digital information, the improvement wherein at least one of said rows of digital information comprises positioning information for controlling positioning of said focussing and directing means in longitudinal and transversal directions.
Claim 2
Dependent Claim
98 words
In an optical tape recording system for recording digital information on an optical tape including a light source for producing a light beam and means, optically coupled with said light source, for focussing and directing said light beam at said optical tape, said optical tape including a plurality of tracks for recording said digital information, each of said plurality of tracks comprising at least one row of digital information, the improvement wherein at least one of said rows of digital information comprises positioning information for controlling positioning of said focussing and directing means in longitudinal and transversal directions.
Claim 3
Dependent Claim
34 words
The improvement as recited by claim 1 wherein said positioning information comprises a first plurality of bits for identifying a track number and a second plurality of bits for indicating a relative longitudinal position.
Claim 4
Dependent Claim
26 words
The improvement as recited by claim 2 wherein said optical tape recording system further comprises means for reading coarse position information encoded on said optical tape.
Claim 5
Dependent Claim
28 words
The improvement as recited by claim 1 wherein said positioning information further comprises control information for controlling focussing of said focussing and directing means in a tangential direction.
Claim 6
Dependent Claim
87 words
A digital information recording system for recording digital information on a tape, comprising: a read/write head for reading and writing said digital information; a first reel for holding a first portion of said tape; a second reel for holding a second portion of said tape; first drive means for driving said first reel and said second reel at a first speed; second drive means for causing movement of said tape relative to said read/write head at a second speed, said second speed slower than said first speed.
Claim 7
Dependent Claim
87 words
A digital information recording system for recording digital information on a tape, comprising: a read/write head for reading and writing said digital information; a first reel for holding a first portion of said tape; a second reel for holding a second portion of said tape; first drive means for driving said first reel and said second reel at a first speed; second drive means for causing movement of said tape relative to said read/write head at a second speed, said second speed slower than said first speed.
Claim 8
Dependent Claim
14 words
The recording system as recited by claim 5 wherein said tape is optical tape.
Claim 9
Dependent Claim
52 words
The recording system as recited by claim 5 further comprising: first tensioning means for tensioning said tape in a first direction relative to said first reel and said second drive means; second tensioning means for tensioning said tape in a second direction relative to said first reel and said second drive means.
References Cited (Backward Citations)
US3632205A
Cited
US3874621A
Cited
US3732796A
Cited
US4000493A
Cited
US3797935A
Cited
US4060323A
Cited
US4201455A
Cited
US4168506A
Cited
US4669070A
Cited
US4321564A
Cited
US4455485A
Cited
US4541712A
Cited
US4515879A
Cited
US4567585A
Cited
US4577932A
Cited
GB2167202A
Cited
US4633455A
Cited
US4796038A
Cited
US4884260A
Cited
US4815067A
Cited
US4743091A
Cited
US4774579A
Cited
US4872746A
Cited
US4970707A
Cited
US4950890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |