| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 369110010 | Polarization of or by storage medium information element | 14 |
| 20080298208 | OPTICAL HEAD AND OPTICAL DISC APPARATUS - An optical head includes semiconductor lasers for 455 nm, 655 nm, and 785 nm bands; a polarization change element and a polarizing beam splitter for luminous flux with a wavelength of 455 nm band, a first collimation lens for converting luminous flux having passed through the polarizing beam splitter into parallel flux, a first quarter-wave plate, a BD objective for focusing the flux onto a signal recording surface of BD, a first photo-detector for receiving light reflected by BD, a composite prism for reflecting flux reflected by the splitter and transmitting most of flux from the lasers for 655 nm and 785 nm bands, a second collimation lens for converting flux emitted from the composite lens into parallel flux, a second quarter-wave plate, an objective compatible with HD DVD, DVD, and CD; and a second photo-detector for receiving light reflected by HD DVD, DVD, and CD. | 12-04-2008 |
| 20080316897 | METHODS OF TREATING A SURFACE OF A FERROELECTRIC MEDIA - A method of forming a passivation layer over a ferroelectric layer of a ferroelectric media comprises introducing the ferroelectric layer to a plasma comprising one of oxygen, oxygen-helium, and oxygen-nitrogen-helium, etching a surface of the ferroelectric layer, forming one of a substantially oxygen enriched layer and a substantially hydroxyl enriched layer at the surface of the ferroelectric layer, introducing the ferroelectric layer to an environment comprising substantially nitrogen, and maintaining the ferroelectric layer within the environment so that nitrogen enriches the substantially oxygen enriched layer to form a passivation layer. | 12-25-2008 |
| 20090016191 | OPTICAL HEAD DEVICE - It is provided an optical head device which includes: a light source; an objective lens, configured to converge light emitted from the light source to an information recording surface of an optical disk; a beam splitter, configured to deflect returned light reflected by the optical disk into an optical path which is different from an optical path of the light emitted from the light source; a photo detector, configured to detect the returned light deflected by the beam splitter; and a depolarizing element, disposed on an optical path between the beam splitter and the photo detector, and configured to cause the returned light to transmit through while reducing a degree of polarization of the returned light. | 01-15-2009 |
| 20090154322 | WAVELENGTH-SELECTIVE LIGHT-SHIELDING ELEMENT AND OPTICAL HEAD USING THE SAME - In order to provide a wavelength-selective light-shielding element capable of blocking circularly-polarized light beams rotating in a specific direction among light beams whose wavelengths falling in a specific range, a light-shielding region is provided in a portion of a transparent substrate, wherein the light-shielding region permits passage of first circularly-polarized light rotating in a first direction regardless of a wavelength of the first circularly-polarized light and blocks second circularly-polarized light beams whose wavelengths falling within a predetermined range, among second circularly-polarized light beams rotating in the second direction, to thus permit passage of the second circularly-polarized light beams falling outside the predetermined range. | 06-18-2009 |
| 20090268581 | OPTICAL PICK-UP DEVICE - An optical pickup in which constituting components are arranged so that a dead space can be reduced and aberrations can also be reduced at a low manufacturing cost is provided. In an outward path for projecting a laser beam onto a recording surface | 10-29-2009 |
| 20100149948 | Method and System for Reading High Density Optical Information - The invention relates to the writing and optical reading of high-density information. The higher energy density at the center of the reading laser beam is used for modifying the energy structure of an active layer in such a way as to make it capable of bearing surface plasmons. The coupling of the laser beam and the active layer thus modified can then excite surface plasmons in an interface between a dielectric layer and the active layer. These surface plasmons are disturbed by physical marks having very small dimensions and written in the optical storage medium; these disturbances generate a remote-field optical response which can be detected by a detector. The operation is carried out in super-resolution, the surface plasmons being generated only at the center of the laser beam and not at the periphery. It is therefore possible to write and to read again marks having dimensions of size smaller than the theoretical resolution of the optical reading system. | 06-17-2010 |
| 20100188959 | INFORMATION STORAGE MEDIUM AND APPARATUS FOR RECORDING/REPRODUCING THE SAME - An information storage medium and an apparatus for recording/reproducing the same are provided. The information storage medium is provided in which repetitive recording is performed by using nanorods formed of a material capable of repeatedly changing light absorption. | 07-29-2010 |
| 20110149709 | Optical Pickup Apparatus - An optical-pickup apparatus includes: a three-wavelength-laser diode including first-, second-, and third-laser elements to emit first-, second-, and third laser beams having first, second, and third wavelengths, respectively, the three laser elements housed in the same case; an objective lens to focus the three laser beams onto first- to third-optical-disc-signal-recording layers, respectively; a first photodetector to be irradiated with first-return light reflected from the first-optical-disc-signal-recording layer, a second photodetector to be irradiated with second- and third-return lights respectively reflected from the second- and third-optical-disc-signal-recording layers; a polarizing-beam splitter to reflect the three laser beams toward the lens, and allow the three return lights having passed through the lens to pass therethrough; a semitransparent mirror on which the three return lights having passed through the polarizing-beam splitter are incident, and which guide the first-return light toward the first photodetector and the second- and third-return lights toward the second photodetector. | 06-23-2011 |
| 20130135981 | METHOD FOR REMOTE TRANSMISSION OF AN ENERGY INFORMATION SIGNAL FROM ANIMATE INANIMATE OBJECTS, AND AN ENERGY INFORMATION SIGNAL CONVERTER - A method comprised of transferring energy information signals onto a first intermediate carrier, with subsequent transmission of information to a receiver input and taking off the signal at the reception side of the receiver by transferring the signal onto a second intermediate carrier, for use in any area of the economy. For remote transmission of an energy information signal from animate and inanimate objects, the energy information signal of an original object is converted to an information-wave beam and brought to a coherent state by passing the beam through a crystal located between two polarizers. The converted signal is recorded onto the first intermediate carrier, entered into a transceiver and transmitted over wire and wireless communication networks together with an electromagnetic wave signal, with subsequent recording of the received signal onto the second carrier and reading off the second carrier the energy information signal peculiar to the original object. | 05-30-2013 |
| 20140160914 | INFORMATION RECORDING MEDIUM, INFORMATION DEVICE, AND METHOD FOR PRODUCING INFORMATION RECORDING MEDIUM - An information device is an information device that records information on or reproduces information from an information recording medium ( | 06-12-2014 |
| 369110020 | Separation into plural polarization component beams | 4 |
| 20130188466 | OPTICAL PICKUP APPARATUS - An optical-pickup apparatus includes: a laser-light-source unit to emit a laser beam having a first or second wavelength selectively; an objective lens; a photodetector; a light-splitting unit to split first and second laser beams respectively emitted from the laser-light-source unit and an optical-recording medium according to a wavelength and polarization direction, and guide the first and second laser beams to the lens and photodetector, respectively; and a quarter-wave plate arranged between the light-splitting unit and lens to convert the laser beams having the first and second wavelengths incident thereon through the light-splitting unit, from linearly-polarized light to circularly-polarized light and from linearly-polarized light to elliptically-polarized light, respectively, the laser beam having the second wavelength being incident, as first linearly-polarized light, on the light-splitting unit, and the light-splitting unit performing phase shift for the laser beam having the second wavelength incident thereon through the quarter-wave plate to reduce a first-linearly-polarized-light component. | 07-25-2013 |
| 369110030 | By diffraction | 1 |
| 20160104505 | OPTICAL INFORMATION APPARATUS AND INFORMATION PROCESSING APPARATUS - An RF hologram is divided in a direction perpendicular to a tangent line of an information track of an information recording surface of an optical disc, and includes a central region including an optical axis of laser light as well as a first end portion region and a second end portion region which sandwich the central region, the central region is formed by a binary diffraction grating and generates ±1 order diffracted light, the first end portion region is formed by a blazed diffraction grating and generates first +1 order diffracted light, the second end portion region is formed by a blazed diffraction grating and generates second +1 order diffracted light, and an RF light receiving element receives both the ±1 order diffracted light, the first +1 order diffracted light, and the second +1 order diffracted light. | 04-14-2016 |
| 369110040 | Using plural polarized or polarizing optical elements | 2 |
| 20090016192 | RADIAL POSITION REGISTRATION FOR NON-DATA SIDE OF OPTICAL DISC - The invention provides reference patterns marked on a non-data side of an optical disc. When the optical disc, according to the invention, is installed within an optical information recording apparatus, the reference patterns enable an optical pick-up unit of the optical information recording apparatus to register at at least one reference radial position on the no-data side of the optical disc. The at least one reference radial position is for assisting the optical pick-up unit to record a label on the non-data side of the optical disc. | 01-15-2009 |
| 20110170396 | LIGHT EMITTING DEVICE, OPTICAL PICKUP APPARATUS AND METHOD FOR MANUFACTURING THE SAME - In the present invention, to improve CD read/write characteristics having poor image height characteristics, a third light emitting source emitting a third laser beam for CD is disposed on an optical axis of an objective lens. Thereby, the third laser beam emitted from the third light emitting source travels along the optical axis of the objective lens, thus generating no coma aberration in the third laser beam. Furthermore, in the present invention, a second light emitting source emitting a second laser beam for DVD and a first light emitting source emitting a first laser beam for BD are disposed across the third light emitting source. Thereby the phase propagation directions of coma aberrations in the first and second laser beams coincide with each other. Adjustment of the coma aberration in one of the laser beams enables the coma aberration in the other laser beam to be adjusted. | 07-14-2011 |
