US5177724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical tape recorder using a resonant flexure scanner
Assignee: Crea Products Inc
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Filing: 1991-10-08
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Granted: 1993-01-05
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Expires: 2011-10-08
Abstract
Abstract An optical tape recorder uses a resonant flexure scanner to scan across the width of optical tape in a straight or nearly straightline. The use of flexure eliminates bearings in the scanner design and lowers cost. High data rate is achieved by using a multi-channel laser diode array for writing, imaged by a single moving lens mounted on the scanner. The use of a highly resonant scanner enables to interpolate the position of the lens by knowing the amplitude and frequency of the scanner. The flexing part of the scanner is a single flat spring or a combination of flat springs arranged to generate linear motion.
Inventors
- 👤 Daniel Gelbart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:45
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/09; G11B7/0925; G11B7/0932; G11B7/002; G11B7/003; G11B7/085; G11B7/0857
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
An optical recorder for data storage comprising: an array of laser diodes modulated by incoming data; a material capable of being marked by the focused light of said laser diodes; a scanner using flexure to generate a scan parallel to the surface of said material and means of driving said scanner at its natural resonant frequency and at a constant amplitude; a mirror mounted on moving part of said scanner onto which light from said modulated laser diodes impinges; a lens mounted on moving part of said scanner to focus said light reflected from said mirror onto surface of said material, causing a permanent mark when any of said laser diodes are turned on and means of moving said material in a direction perpendicular to direction of movement of said scanner while synchronized to said scanner.
Claim 2
Dependent Claim
136 words
An optical recorder for data storage comprising: an array of laser diodes modulated by incoming data; a material capable of being marked by the focused light of said laser diodes; a scanner using flexure to generate a scan parallel to the surface of said material and means of driving said scanner at its natural resonant frequency and at a constant amplitude; a mirror mounted on moving part of said scanner onto which light from said modulated laser diodes impinges; a lens mounted on moving part of said scanner to focus said light reflected from said mirror onto surface of said material, causing a permanent mark when any of said laser diodes are turned on and means of moving said material in a direction perpendicular to direction of movement of said scanner while synchronized to said scanner.
Claim 3
Dependent Claim
36 words
An optical recorder for data storage as set forth in claim 1 wherein said scanner comprises of flat springs arranged in a manner to move the said lens in a straight line parallel to said material.
Claim 4
Dependent Claim
26 words
An optical recorder for data storage as set forth in claim 1 wherein said scanner is moving said lens in an arc parallel to said material.
Claim 5
Dependent Claim
28 words
An optical recorder for data storage as set forth in claim 1 wherein said scanner includes a magneto-strictive element in order to modify the trajectory of said lens.
Claim 6
Dependent Claim
22 words
An optical recorder for data storage as set forth in claim 1 wherein said material is optical tape housed in a cartridge.
Claim 7
Dependent Claim
22 words
An optical recorder for data storage as set forth in claim 1 wherein said material is optical tape housed in a cassette.
Claim 8
Dependent Claim
20 words
An optical recorder for data storage as set forth in claim 1 wherein said material is an optical memory card.
References Cited (Backward Citations)
US4616355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-05 | 1996-07-06 | 1997-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-05 | 2000-07-06 | 2001-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-05 | 2004-07-06 | 2005-01-05 | $7700.00 | Window Closed / Lapsed |