US4301374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shutter system for optical multi-lens scanner
Assignee: Fujifilm Holdings Corp
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Filing: 1979-11-16
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Granted: 1981-11-17
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Expires: 1999-11-16
Abstract
Abstract An optical information storage system having a data record with control markings therein and an optical readout system including a scanner. The readout system uses a laser light source and focusing optics to direct the light onto the data record for modulation and subsequent readout of the modulated light. Shutter elements are interposed to intercept the transmission of light in response to control signals in the data. The shutter, of the electronic type such as lead lanthanum zirconate titanate, may be positioned either between the source of light and the scanner or between the data record and the readout.
Inventors
- 👤 Masakazu Hashiue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:15
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/085; G11B7/12; G11B7/135; G11B7/1381
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
In an optical information storage system having a data record and a scanner moving relatively to each other, the data record having a data train thereon, a source of light optic means to direct said light from said source to said scanner, said scanner focusing said light on said data train to be modulated by said data train, and readout means for recovering said modulated light, the improvement comprising; shutter means to interrupt the transmission of light and control means to selectively actuate said shutter means in response to signals in said data train.
Claim 2
Dependent Claim
94 words
In an optical information storage system having a data record and a scanner moving relatively to each other, the data record having a data train thereon, a source of light optic means to direct said light from said source to said scanner, said scanner focusing said light on said data train to be modulated by said data train, and readout means for recovering said modulated light, the improvement comprising; shutter means to interrupt the transmission of light and control means to selectively actuate said shutter means in response to signals in said data train.
Claim 3
Dependent Claim
22 words
The optical information storage system of claim 1 wherein said shutter means is interposed between said source of light and said scanner.
Claim 4
Dependent Claim
23 words
The optical information storage system of claims 1 or 2 wherein said shutter means is interposed between said optic means and said scanner.
Claim 5
Dependent Claim
22 words
The optical information storage system of claim 1 wherein said shutter means is interposed between said data record and said readout means.
Claim 6
Dependent Claim
48 words
The optical information storage system of claims 1, 2 or 4 wherein said control means comprises a decoder to determine the position of said scanner during a scan of a line of data on said data record and means to actuate said shutter in response to decoder output.
Claim 7
Dependent Claim
33 words
The optical information storage system of claims 1, 2 or 4 wherein said shutter comprises two elements placed to extend from end portions of said data record into a domain of useable data.
Claim 8
Dependent Claim
17 words
The optical information storage system of claim 6 wherein said shutter elements are lead lanthanum zirconate titanate.
Claim 9
Dependent Claim
19 words
The optical information storage system of claims 1, 2, or 4 wherein said shutter means comprises an electro-optic shutter.
Claim 10
Dependent Claim
17 words
The optical information storage system of claim 8 wherein said electro-optic shutter is lead lanthanum zirconate titanate.
References Cited (Backward Citations)
US3919698A
Cited
US4105926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |