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US3721965A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for forming a multiple image laser optical memory

Assignee: Bull HN Information Systems Italia SpA
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Filing: 1971-11-22
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Granted: 1973-03-20
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Expires: 1991-11-22
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Abstract

Abstract A modulated laser beam having a uniplanar, two direction deflection is directed to a mirror tunnel. The mirror tunnel divides the single laser beam into multiple laser beams. The multiple laser beams are polarized and a beam selector permits only one raster scan from the multiple images of the mirror tunnel to reach the memory film target. The Curie-point recording method forms the information onto the film. For reading information from the target, the laser beam is deflected, multiplied and selected as for writing. Reflected light from a spot on the target exhibits a clockwise or counter-clockwise change in the polarization angle depending on the binary state of the magnetic field. The Kerr-effect polarization change is passed through a polarization filter which permits one state of the magnetic field to be passed and blocks the second state of the magnetic field. The light passing through the polarizing filter is collected by a lens and detected by a light detector such as a photocell. The output of the light detector is directed to a utilization device for use therein.

Inventors

  • 👤 Voyce A Morgan

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 00:56
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G11; G11C; G11C13/00; G11C13/04; G11C13/06

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 206 words
An optical memory system comprising in combination: light beam emitting means for emitting a high energy level light beam; means for modulating said light beam emitting means in response to binary information bit signals; X-Y deflecting means receiving the modulated light beam for deflecting said light beam in a horizontal and a vertical direction; a mirror tunnel system receiving said light beam from said X-Y deflecting means and multiplying said light beam to produce a plurality of parallel light beams each displaced a distance from each other; beam selector means for selectively allowing one light beam from said plurality of light beams to pass through said beam selector means; a target having a plurality of image areas, said target being formed of a material sensitive to said light beam and positioned such that each of said plurality of parallel light beams scans a corresponding one of said image areas when said light beam is deflected by said X-Y deflecting means; and a polarizing filter for polarizing the light beam before said light beam strikes said image area; said light beam being of sufficient energy level to cause a change in the material forming the target according to the binary information bit signals modulating said light beam.
Claim 2
Dependent Claim 206 words
An optical memory system comprising in combination: light beam emitting means for emitting a high energy level light beam; means for modulating said light beam emitting means in response to binary information bit signals; X-Y deflecting means receiving the modulated light beam for deflecting said light beam in a horizontal and a vertical direction; a mirror tunnel system receiving said light beam from said X-Y deflecting means and multiplying said light beam to produce a plurality of parallel light beams each displaced a distance from each other; beam selector means for selectively allowing one light beam from said plurality of light beams to pass through said beam selector means; a target having a plurality of image areas, said target being formed of a material sensitive to said light beam and positioned such that each of said plurality of parallel light beams scans a corresponding one of said image areas when said light beam is deflected by said X-Y deflecting means; and a polarizing filter for polarizing the light beam before said light beam strikes said image area; said light beam being of sufficient energy level to cause a change in the material forming the target according to the binary information bit signals modulating said light beam.
Claim 3
Dependent Claim 132 words
The optical memory system according to claim 1 further including: means for lowering the energy level of a reflex light beam reflected from the target caused by the light beam striking the target; a polarizing filter for allowing the reflex light beams of one polarization angle to pass through and for preventing the reflex light beams of a second polarization angle to be lowered in intensity; a gathering means for collecting the reflex light beams passing through said polarizing filter; light detector means for sensing the light level collected by said gathering means and for generating a binary electrical signal in response thereto; and data decoding means connected to said light detector means for decoding the binary electrical signals according to the actuation of the modulating means and the X-Y deflecting means.
Claim 4
Dependent Claim 18 words
The optical memory system according to claim 1 wherein said light beam emitting means is a laser system.
Claim 5
Dependent Claim 20 words
The optical memory system according to claim 1 wherein said beam selector means is a plurality of Kerr-type optical cells.
Claim 6
Dependent Claim 205 words
An optical memory system comprising in combination: a laser system emitting a light beam amplified by stimulated emission of radiation; means for modulating the light beam emitted by said laser system in response to binary information signals; X-Y deflecting means receiving the modulated light beam for deflecting said light beam in a horizontal and a vertical direction; a mirror tunnel system for multiplying said light beam to produce a plurality of parallel light beams each displaced a distance from each other; beam selector means for selectively allowing one light beam from said plurality of light beams to pass through said beam selector means; a target having a plurality of image areas, said target being formed of a magnetic film and positioned such that each of said plurality of parallel light beams scans a corresponding one of said image areas when said light beam is deflected by said X-Y deflecting means, and means for polarizing said light beam before said light beam strikes said target; said laser system producing a light beam of sufficient energy such that each of said plurality of parallel light beams is capable of raising one element in the image area of said target to the Curie-point temperature of the target material.
Claim 7
Dependent Claim 205 words
An optical memory system comprising in combination: a laser system emitting a light beam amplified by stimulated emission of radiation; means for modulating the light beam emitted by said laser system in response to binary information signals; X-Y deflecting means receiving the modulated light beam for deflecting said light beam in a horizontal and a vertical direction; a mirror tunnel system for multiplying said light beam to produce a plurality of parallel light beams each displaced a distance from each other; beam selector means for selectively allowing one light beam from said plurality of light beams to pass through said beam selector means; a target having a plurality of image areas, said target being formed of a magnetic film and positioned such that each of said plurality of parallel light beams scans a corresponding one of said image areas when said light beam is deflected by said X-Y deflecting means, and means for polarizing said light beam before said light beam strikes said target; said laser system producing a light beam of sufficient energy such that each of said plurality of parallel light beams is capable of raising one element in the image area of said target to the Curie-point temperature of the target material.
Claim 8
Dependent Claim 235 words
An optical memory system comprising in combination: light beam emitting means for emitting a high energy level light beam; X-Y deflecting means receiving said light beam for deflecting said light beam in a horizontal and a vertical direction; a mirror tunnel system for multiplying said light beam to produce a plurality of parallel light beams each displaced a distance from each other; beam selector means for selectively allowing one light beam from said plurality of light beams to pass through said beam selector means; a target having a plurality of image areas, said target being formed of a material sensitive to said light beam and positioned such that each of said plurality of parallel light beams scans a corresponding one of said image areas when said light beam is deflected by said X-Y deflecting means, said image areas having elements recorded with binary information bits such that the light beam after striking the element varies in intensity between a recorded ''''1'''' bit and a recorded ''''0'''' bit; light detector means for sensing the binary variance in intensity and for generating binary electrical signals in response thereto; data decoding means connected to said light detector means for decoding the binary electrical signals; controlling means for controlling the operation of said X-Y deflection means and said data decoder means; and a utilization device for actuating said controlling means and for utilizing said decoded binary electrical signals therein.
Claim 9
Dependent Claim 235 words
An optical memory system comprising in combination: light beam emitting means for emitting a high energy level light beam; X-Y deflecting means receiving said light beam for deflecting said light beam in a horizontal and a vertical direction; a mirror tunnel system for multiplying said light beam to produce a plurality of parallel light beams each displaced a distance from each other; beam selector means for selectively allowing one light beam from said plurality of light beams to pass through said beam selector means; a target having a plurality of image areas, said target being formed of a material sensitive to said light beam and positioned such that each of said plurality of parallel light beams scans a corresponding one of said image areas when said light beam is deflected by said X-Y deflecting means, said image areas having elements recorded with binary information bits such that the light beam after striking the element varies in intensity between a recorded ''''1'''' bit and a recorded ''''0'''' bit; light detector means for sensing the binary variance in intensity and for generating binary electrical signals in response thereto; data decoding means connected to said light detector means for decoding the binary electrical signals; controlling means for controlling the operation of said X-Y deflection means and said data decoder means; and a utilization device for actuating said controlling means and for utilizing said decoded binary electrical signals therein.

References Cited (Backward Citations)

US3164816A Cited
US3368209A Cited
US3582183A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-03-19 1976-09-18 1977-03-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-19 1980-09-18 1981-03-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-19 1984-09-18 1985-03-20 $7700.00 Window Closed / Lapsed

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