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| Number | Title | Issue Date |
| 7193963 | Method for inputting information into a data storage medium that is optically recordable and readable In a method of entering information into an optically writable and readable data storage medium having a polymer film which can be changed locally by heating in order to store information and to which there is assigned an absorber dye (34) which is set up to ... | 03/20/2007 |
| 7158273 | Holographic data memory A holographic data storage medium has a polymer film which is set up as a storage layer whose refractive index can be changed locally by heating. The polymer film is set up for the storage of optical phase information via the local optical path length of the polymer... | 01/02/2007 |
| 7079471 | OPTICAL PICKUP USING TWO LASER BEAM SOURCES OF DIFFERENT WAVELENGTHS FOR AN OPTICAL DISK DRIVE AND A CONVERTER TO OPTIMIZE A LIGHT BEAM REFLECTED OFF AN OPTICAL DISC FOR DETECTION BASED ON REFLECTED LIGHT BEAM WAVELENGTH First and second laser beam sources generate first and second laser beams of different wavelengths, respectively. A first collimating lens diverges the first laser beam at a predetermined angle so as to permit a fracture surface aberration of the first laser beam to... | 07/18/2006 |
| 7079455 | Optical reading and writing system An optical reading and writing system including a base; an optical disk rotatably mounted on the base; an optical pickup including an objective lens, focusing a light beam to form a light spot on a recording surface of the optical disk; an actuator arm mounted on th... | 07/18/2006 |
| 7024675 | Cylindrical optical data memory A data storage medium includes an optical information carrier comprising a spiral-wound polymer film. The central area of the data storage medium is provided with a recess whose periphery is formed by the innermost winding of the polymer film. ... | 04/04/2006 |
| 6507550 | Optical data storage medium The present invention provides an optical data storage medium prepared by laminating face-to-face two substrates, at least one of which has a recording layer provided thereon, such that the recording layer faces inwardly, wherein the color difference betw... | 01/14/2003 |
| 5674583 | Optical recording medium and manufacturing method thereof An optical tape including an optical recording layer for permitting information to be optically recorded thereon and a light-reflective magnetic layer; the light-reflective magnetic layer which reflects light projected onto the recording layer, also permi... | 10/07/1997 |
| 5577018 | Phase changing apparatus and optical pickup apparatus for magneto-optic storage device using same In an optical pickup apparatus, including a laser source (11) arranged along an optical axis (0-0'), a polarization beam splitter (14) and an objective lens (13), wherein light emitted from the laser source (11) is emitted on a recording plane (1a) of an ... | 11/19/1996 |
| 5369631 | Recording/reproducing apparatus for optical tape A recording/reproducing apparatus for an optical tape for optically recording and reproducing information on an optical tape having a thermal converting layer. An optical pickup is divided into two separate parts, one for recording and the other for repro... | 11/29/1994 |
| 5351229 | Tribo-attractive contact slider for an optical read/write system An optical recording system in which the optical head is operated in physical contact with the surface of the optical recording medium during system operation at a selected operating speed. The optical head includes one or more optical elements mounted on... | 09/27/1994 |
| 5157650 | Optical recording apparatus An optical recording apparatus employing a plurality of modulated laser beams as means for recording information on an optical recording medium, comprising a laser beam source which emits a laser beam, a plurality of carrier sources which generate carrier... | 10/20/1992 |
| 5155720 | Servo control circuit for image rotator A servo control circuit for an image rotator used in an optical tape recording apparatus that employs a rotary tape drum. Pairs of pulse generators and frequency generators are provided on the image rotator and on the tape drum, respectively. Initially, t... | 10/13/1992 |
| 4942566 | Device for illuminating an auxiliary track of a motion picture film A laser diode (4) emits a beam which is reflected by a plane mirror (12) and by a spherical focusing mirror (2) in order to form a beam (40) which is focused on a read window which is a segment of a read line (6). Said line extends transversely relative t... | 07/17/1990 |
| 4939716 | Optical information carrier An optical information carrier includes a cylinder (1) with a recording layer (2) and bushings (3,4) located at butt ends of the hollow cylinder (1) and insulating the recording layer (2) from the environment. A method for erasing information recorded on ... | 07/03/1990 |
| 4864555 | Optical information carrier, method for erasing information therein, and optical storage device realizing this method An optical information carrier includes a cylinder (1) with a recording layer (2) and bushings (3,4) located at butt ends of the hollow cylinder (1) and insulating the recording layer (2) from the environment. A method for erasing information recorded on ... | 09/05/1989 |
| 4829503 | Optical memory Disclosure is made of an optical memory wherein a cylindrical information carrier (2) is disposed in a stationary cylindrical container (14) filled with a liquid or gaseous medium transparent for the radiation flux emitted by a source (1) of modulated coh... | 05/09/1989 |
| 4811327 | Optical storage device Disclosure is made of an optical storage device wherein a cylindrical information carrier (2) with a recording medium (12) applied on a tubular base (9) is disposed in a stationary cylindrical container (3) having a window (4) in the lateral wall thereof.... | 03/07/1989 |
| 4713672 | Laser beam printer In a laser beam printer wherein the quantity of light of the laser beam is fed back to maintain the light quantity at a constant value, the temperature sensor means is provided for detecting the temperature of the photosensitive member, and the feedback c... | 12/15/1987 |
| 4528654 | Dustproof case for an optical information tape including a clamping lens An apparatus for controlling the monoplanar motion of an object, more in particular a tape containing optically readable information, comprising two opposite clamping means on either side of the object. The object as well as at least one of the clamping m... | 07/09/1985 |
| 4418365 | Video disc transducer system An optical transducer system reproduces a videodisk record by rotating the disc at a low speed. A record guiding means is comprised of a ribbed gate region. The ribs engage the disc on opposite margins of the optical images recorded on the disc and extend... | 11/29/1983 |
| 3980811 | Contacting pickup optical reproduction system A contacting pickup optical waveguide reproduction system and method for reproducing information carried on a recording medium. The recording medium is of the type having optically reflective pits formed in an information path. Information is stored as a ... | 09/14/1976 |
| 3964826 | Dual sound system A Super-8 mm. movie film with two amplitude modulated optical sound tracks, one in each margin of the film. A method for optically recording and reproducing audio information with high fidelity on a very narrow sound track. A scanning apparatus has lens a... | 06/22/1976 |
