| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 369112270 | Waveguide | 13 |
| 20080232225 | 90°-BENT METALLIC WAVEGUIDE HAVING TAPERED C-SHAPED APERTURE, METHOD OF FABRICATING THE WAVEGUIDE, LIGHT DELIVERY MODULE INCLUDING THE WAVEGUIDE, AND HEAT ASSISTED MAGNETIC RECORDING HEAD HAVING THE WAVEGUIDE - A metallic wave guide and a light delivery module are provided. The metallic waveguide includes a metal body formed of a conductive metal and having an aperture formed therethrough, the aperture having input and output ends. The aperture has a bent portion for changing a light traveling direction between the input and output ends, and a tapered portion between the bent portion and the output end. The tapered portion has a width that is gradually reduced toward the output end, and the aperture is formed in a C-shape by a ridge formed on an inner surface of the metal body. | 09-25-2008 |
| 20080304397 | OPTICAL HEAD - A micro optical head is provided, which provides sub-wavelength focusing spot and very long depth of focus. The optical head includes a transparent substrate, an opaque film, and at least one sub-wavelength annular channel. After coherent light transmits the transparent substrate supporting the optical head and passes through the appropriately designed sub-wavelength annular channel, the transmitted light can overcome the diffraction limit, and the transmission energy is improved efficiently. The transmitted light converges after a certain distance behind the optical head and forms a sub-wavelength-scale beam that maintains a very long distance without divergence. | 12-11-2008 |
| 20090073858 | HAMR Recording Head Having A Sloped Wall Pole - An apparatus includes a waveguide having an end adjacent to an air bearing surface, first and second poles positioned on opposite sides of the waveguide, and wherein the first pole includes a first portion spaced from the waveguide and a second portion extending from the first portion to the air bearing surface, with the second portion being structured such that an end of the second portion is closer to the waveguide than the first portion. | 03-19-2009 |
| 20090147661 | Optical Information Processing Apparatus, Optical Pick-Up Device And Optical Recording Disc System - An optical pick-up device includes a laser source enabling emission of at least two light beams with different wavelengths, an objective lens which focuses the light beams emitted from the laser source on an optical disc, an optical detector which receives a light reflected from the optical disc, a front monitor which receives a part of the light beams emitted from the laser source, a front monitor light-guiding plate which guides part of the light beams emitted from the laser source to the front monitor. The front monitor light-guiding plate is arranged between the laser source and the objective lens, at least a part of a region of the front monitor light-guiding plate illuminated by the light beams emitted from the laser source has a predetermined shape which causes the light beams to change traveling direction thereof by refraction and then be guided to the front monitor. | 06-11-2009 |
| 20090245075 | OPTICAL HEAD DEVICE, OPTICAL INFORMATION DEVICE, COMPUTER, DISC PLAYER, CAR NAVIGATION SYSTEM, OPTICAL DISC RECORDER, AND VEHICLE - An optical head device compatible to different types of optical discs and capable of guaranteeing a sufficiently wide dynamic range for a low density optical disc, and the like are provided. | 10-01-2009 |
| 20090303858 | OPTICAL RECORDING HEAD, MAGNETO-OPTICAL RECORDING HEAD AND OPTICAL RECORDING APPARATUS - An optical recording head simply structured, enabling a reduction in thickness, and having sufficient efficiency even if a light source with small output is used when a plasmon probe is used. The optical recording head includes a light source section for emitting light, a slider moving relative to a recording medium, and an optical waveguide disposed in the slider, guiding the light from the light source section and irradiating the surface of the recording medium with the light, and having a light emission angle not perpendicular to the surface, of the slider, facing the surface of the recording medium. | 12-10-2009 |
| 20100008208 | Optical Recording Using a Waveguide Structure and a Phase Change Medium - An apparatus includes a component having a first surface, a first waveguide for directing electromagnetic radiation to a focal point adjacent to the first surface, a storage medium positioned adjacent to the first surface, a detector for detecting electromagnetic radiation reflected from the storage medium, and a structure positioned adjacent to the focal point for collecting the reflected electromagnetic radiation and for transmitting the reflected electromagnetic radiation toward the detector, wherein the structure comprises a second waveguide including a first cladding layer positioned adjacent to a first side of the first waveguide and having a first end positioned adjacent to the first surface and a second cladding layer positioned adjacent to a second side of the first waveguide and having a first end positioned adjacent to the air bearing surface. | 01-14-2010 |
| 20100054109 | CONDENSING OPTICAL DEVICE, OPTICAL PICKUP, AND OPTICAL DISC APPARATUS - An optical pickup includes: a first emission unit emitting an optical beam with a first wavelength corresponding to a first optical disc; a second emission unit emitting an optical beam with a second wavelength, which is longer than the first wavelength, corresponding to a second optical disc different from the first optical disc; a third emission unit emitting an optical beam with a third wavelength, which is longer than the second wavelength, corresponding to a third optical disc different from the first and second optical discs; a condensing optical device condensing, on a signal recording surface of a corresponding optical disc, the optical beams emitted from the first to third emission units; and a diffraction unit provided in the condensing optical device, which is disposed on the optical path of the optical beams with the first to third wavelengths. | 03-04-2010 |
| 20100054110 | REFLECTING WAVELENGTH PLATE AND OPTICAL PICKUP USING REFLECTING WAVELENGTH PLATE - Disclosed is a reflecting wavelength plate that deflects and reflects a light path and adds a phase difference with respect to plural incident light having different wavelengths. The reflecting wavelength plate includes a substrate; a reflecting film laminated on the substrate; and a sub-wavelength concavo-convex structure that is laminated on the reflecting film and has a pitch less than or equal to the shortest wavelength of the plural incident light. The filling factor and the groove depth of the sub-wavelength concavo-convex structure are determined so as to add the phase difference obtained by (kπ)/8, where k is an integer, to the plural incident light having the different wavelengths. | 03-04-2010 |
| 20100165822 | THERMALLY ASSISTED RECORDING HEAD HAVING RECESSED WAVEGUIDE WITH NEAR FIELD TRANSDUCER AND METHODS OF MAKING SAME - According to one embodiment, an apparatus includes a near field transducer comprising a conductive metal film having a main body and a ridge extending from the main body and an optical waveguide for illumination of the near field transducer, a light guiding core layer of the optical waveguide being spaced from the near field transducer by less than about 100 nanometers and greater than 0 nanometers. In another embodiment, a method includes forming a near field transducer structure and removing a portion of the near field transducer structure. The method also includes forming a cladding layer adjacent a remaining portion of the near field transducer structure, wherein a portion of the cladding layer extends along the remaining portion of the near field transducer structure and forming a core layer above the cladding layer. Other apparatuses and methods are also included in the invention. | 07-01-2010 |
| 20100177624 | OPTICAL SYSTEM WITH A NUMBER OF RADIATION SOURCES - The present invention relates to an optical system for reproducing and/or recording optically readable effects on an associated optical record carrier by means of a number of radiation sources. The number of radiation sources comprises a first radiation source capable of emitting a first radiation beam, and at least a second radiation source capable of emitting at least a second radiation beam. The system further comprises beam dividing means for separating at least the first beam into a first main beam and at least a first auxiliary beam, moreover the system comprises photodetection means capable of detecting reflected light from an associated optical record carrier, wherein the optical system is adapted to perform radial tracking from the reflected light of the at least first auxiliary beam being positioned in a first guard band comprised on the associated carrier, and wherein the number of radiation sources is less than or equal to the number of tracks. | 07-15-2010 |
| 20100246371 | OPTICAL INFORMATION RECORDING APPARATUS AND METHOD OF OPTICALLY RECORDING INFORMATION - According to a first aspect of the invention, an optical information recording apparatus includes a spatial beam modulator, an optical component, a drive unit, and a control unit. The apparatus performs angle-multiplex recording of the information so that an absolute value of a bisector angle θ | 09-30-2010 |
| 20120307620 | LIGHT SOURCE DEVICE, OPTICAL PICKUP, AND RECORDING DEVICE - A light source device configured as a master oscillator power amplifier includes a mode locked laser unit having an external resonator and a semiconductor optical amplifier that amplifies and modulates laser light emitted from the mode locked laser unit. The width in a lateral direction of a waveguide on an incident side of the semiconductor optical amplifier is set so that a horizontal lateral mode of the waveguide on the incident side of the semiconductor optical amplifier becomes multiple modes, and a magnification conversion unit that converts a magnification of incident light from the mode locked laser unit to the semiconductor optical amplifier is disposed so that a basic mode is selectively excited in optical coupling on the incident side of the semiconductor optical amplifier. | 12-06-2012 |
