Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 5384221 | Birefringent azo dye polymer erasable optical storage medium An optical storage medium including a transparent polymer and an isomerizable AZO dye, the optical storage medium being coated as a water miscible solution on a substrate so as to form a film having a thickness of from μm to 100 μm storing information t... | 01/24/1995 |
| 5325324 | Three-dimensional optical memory Selected domains, normally 103 ×103 such domains arrayed in a plane, within a three-dimensional (3-D) volume of active medium, typically 1 cm3 of spirobenzopyran containing 102 such planes, are temporally and s... | 06/28/1994 |
| 5316900 | Optical recording medium having a constant birefringent property and an alterable photochromic property A recording medium comprises a recording layer, a birefringent layer, and a reflecting layer. The recording layer is formed of a material whose optical rotatory power is alterable such that in one state no optical rotatory power is present and, in a secon... | 05/31/1994 |
| 5311474 | Random access optical storage This application concerns an optical storage with an optical storage medium having a plurality of storage fields arranged in matrix fashion, wherein each storage field of this storage field matrix comprises a storage position matrix consisting of a number... | 05/10/1994 |
| 5239504 | Magnetostrictive/electrostrictive thin film memory A data storage system is described which includes a magnetostrictive, anisotropic, ferromagnetic film whose domains exhibit a preferred orientation and are initially poled in one direction along the preferred orientation. A field is applied in opposition ... | 08/24/1993 |
| 4977540 | Spin glass type associative processor system An associative data processor including a spin glass type amorphous magnetic film has input areas, output areas, and "hidden" or associative areas. A coil provides selective magnetic biasing, and lasers provide selective digital input to the input and out... | 12/11/1990 |
| 4953124 | Opto-magnetic signal reproducing apparatus for reading, by differential detection using a magneto-optical effect, information magnetically recorded on a record medium An opto-magnetic signal reproducing apparatus includes a light source unit for applying a linearly polarized light beam to a recording medium having magnetically recorded information, a splitter for splitting the light beam modulated, responding to the re... | 08/28/1990 |
| 4945514 | Method of bistable optical information storage using antiferroelectric phase PLZT ceramics A method for bistable storage of binary optical information includes an antiferroelectric (AFE) lead lanthanum zirconate titanate (PLZT) layer having a stable antiferroelectric first phase and a ferroelectric (FE) second phase obtained by applying a switc... | 07/31/1990 |
| 4864537 | Polymers and dye combinations and methods for their use in optical recording A polymer and dye combination suitable for use in optically recording information. The present invention includes a material which may exhibit the property of birefringence under selected conditions such as when stretched. This birefringence can be relaxe... | 09/05/1989 |
| 4789965 | Methods and compositions for recording optical information employing molecular pseudorotation Methods and compositions for use in optically recording information. The present invention includes incorporating solute molecules within an extremely viscous medium. The solute molecules may be chemically bound within the medium or they may be held physi... | 12/06/1988 |
| 4731754 | Erasable optical memory material from a ferroelectric polymer An electro-optic memory effect providing for storing, erasing and rewriting igital information relies upon a ferroelectric polymer, polyvinylidene fluoride. Recent development of tri-fluoroethylene copolymers of this material with Curie temperatures below ... | 03/15/1988 |
| 4672594 | Magneto-optical recording system utilizing a leakage magnetic field of focusing actuator In a magneto-optical file memory wherein a storage medium having a vertical magnetic film is irradiated with a laser beam to reverse a magnetization direction of the magnetic film, thereby to write and/or erase information, and a rotation of polarizable f... | 06/09/1987 |
| 4654837 | Magneto-optic transducer with enhanced signal performance A magneto-optic transducer for providing an optical indication of variations in magnetization in a magnetic storage medium located along a predetermined path. The transducer has a thin film of magneto-optic material with an edge positionable closely adjac... | 03/31/1987 |
| 4551819 | Optical recording method and apparatus utilizing polymeric birefringent materials An optical recording media as well as methods and apparatus for reading and writing on the novel media are provided. The novel media has the property of birefringence, and information is stored thereon by modifying the birefringence of the storage media a... | 11/05/1985 |
| 4449204 | Information processing apparatus using a semiconductor laser diode An optical information processing apparatus comprises an information recording medium, a semiconductor laser diode for issuing a laser beam and an optical system adapted to direct the issued laser beam from the semiconductor laser diode toward the informa... | 05/15/1984 |
| 4424580 | Method and apparatus for generating electron spin reversal in ferrimagnetic material Methods and apparatus for reversibly altering magnetic characteristics or domains of ferrimagnetic material by photomagnetic means, particularly by electron spin reversal (spin-flip). Photomagnetic electron spin reversal and inversion creating cylinder do... | 01/03/1984 |
| 4414650 | Magneto-optic memory element A magneto-optic memory medium comprises a reflector exhibiting reflectance for light used for information reproduction and a magneto-optic magnetization film disposed on the reflector. When light is applied for information reproduction, the light impinges... | 11/08/1983 |
| 4296479 | Method for optical recording in photo-dichroic glass surfaces The instant invention is directed to a method for writing and erasing images in the surface of a photosensitive glass which demonstrates photoanisotropic behavior at a mega Hz or higher rate. This is accomplished by utilizing an erasing beam of linearly-p... | 10/20/1981 |
| 4167024 | System for recording or reproduction of signals by means of polarized light beams Information is converted from electrical-signal form to recorded form, or from recorded form to electrical-signal form. A beam of light emitted by a light source is split into two component light beams each having a different respective polarization plane... | 09/04/1979 |
| 4158433 | Method of and apparatus for securing and storing personal information Secured computerized credit cards of the ferromagnetic storage variety, and a computer system that makes use of such cards at more than one location. The card comprises a plurality of ferromagnetic elements, within a continuous ferromagnetic medium, capab... | 06/19/1979 |
| 4079429 | Optical detector for magnetic fields employing feedback circuitry An optical detector for magnetic fields detects rotations in the polarization of a beam of polarized light caused by the magnetic fields. A modulator responsive to a fixed frequency signal introduces a fixed frequency of oscillation in the polarization of... | 03/14/1978 |
| 4005275 | Wideband analog photorecording apparatus and method A wideband analog photorecorder comprises a transparent Bragg cell as an acousto-optic transducer and a pulsed laser positioned to sequentially illuminate a moving recording medium (photographic film) through the cell. The acousto-optic cell is energized ... | 01/25/1977 |
| 3998523 | Electro-optic ceramic material An electro-optic ceramic material useful for electro-optic applications comprising an anti-ferroelectric phase (or para-electric phase) and a ferroelectric phase, the two phases of which coexist having a morphotrophic phase boundary. The scattering of lig... | 12/21/1976 |
| 3990770 | Electro-optic picture display and memory device An electro-optic picture display and memory device employs a material which has the property of field-induced ferroelectricity such as lanthanum-containing mixed crystals of lead zirconate and lead titanate. Remanent storage is achieved in that certain el... | 11/09/1976 |
| 3945715 | Electro-optical birefringence device employing edge effect An electro-optical transducer and data storage device is operated by electrically establishing different electric field levels in a retentive ferroelectric PLZT crystal. The crystal may have a plurality of areas that serve as data storage elements, each o... | 03/23/1976 |
| 3934234 | Photodichroic readout device using circularly polarized light A unique photodichroic readout device composed of photodichroic material u which is passed a circularly polarized light beam that is horizontally or vertically polarized dependent upon the storage of information in the material. The beam is then passed t... | 01/20/1976 |
