Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 8077584 | Beam shifting element for an optical storage system The present invention relates to a beam shifting element and to an apparatus for reading from and/or writing to optical storage media using in such a beam shifting element. According to the invention, the beam shifting element has at least a first optical ele... | 12/13/2011 |
| 7974173 | Optical device for holographic recording or reading and method for controlling the same An optical device for holographic recording or reading is provided and includes: a light emission unit that emits light to be irradiated on an optical recording medium, the light being recording or reading light; a first prism unit that moves in accordance with a mo... | 07/05/2011 |
| 7948855 | Optical pickup A multiple wavelength-adaptive optical pickup according to the present invention enables to obtain stable signals by suppressing displacement of optical intensity distribution at a light receiving section. When an incident angle of a central beam of a zero-dimension... | 05/24/2011 |
| 7903529 | Optical head and optical disc device A transmitting/reflecting member for transmitting a laser beam of a first wavelength emitted from a first light source includes a first surface on which the laser beam of the first wavelength emitted from the first light source is incident and a second surface which... | 03/08/2011 |
| 7408847 | Integrated type optical head with sheet waveguide and light coupler An integrated optical head is provided. In the integrated optical head, a light source emits light. A waveguide guides the light. An input coupler is located at one edge of the waveguide, and couples light emitted from the light source and transmits the coupled ligh... | 08/05/2008 |
| 7355933 | Optical pickup device Substantially all of the laser light emitted from laser chip(s) 11 toward optical disk(s) 17 may be transmitted through polarizing hologram(s) 13 and may thereafter be transmitted through quarter-wave plate(s) 15, and after being reflecte... | 04/08/2008 |
| 7345982 | Optical pickup device, optical disk drive, optical device and composite optical element An optical pickup device is provided which includes a double-wavelength objective lens (34) that collects a light beam selectively emitted from a light-emitting/-detecting element (31) that selectively emits a plurality of light beams different in wave... | 03/18/2008 |
| 7345267 | Optical system having element for correcting aberration of mirror and optical pickup apparatus employing the same An optical system including a light source that generates light, a mirror changing an optical path of the light generated by the light source and an aberration correcting element that corrects aberrations generated in the light reflected from the mirror due to an er... | 03/18/2008 |
| 7342868 | Compatible optical pickup apparatus A compatible optical pickup apparatus and method are provided. The apparatus and method include a first light source for generating and emitting a first light having a predetermined wavelength, a second light source for generating and emitting a second light having ... | 03/11/2008 |
| 7317672 | Optical head An optical head includes the following: a light beam separator (35) that includes substantial interference regions for light that is reflected from an information recording medium and travels in a straight path and ±first-order diffracted light produced by i... | 01/08/2008 |
| 7289693 | System and method for producing optical circuits A method of fabricating a plurality of composite optical assemblies is disclosed. Each optical assembly includes a first optical element and a second optical element. The method includes the steps of providing a first composite substrate that may be divided into a p... | 10/30/2007 |
| 7289416 | Optical pickup and optical disk apparatus An optical pickup for performing data recording and reproduction with respect to both CDs and DVDs and a disk apparatus incorporating the optical pickup. The optical pickup comprises a CD laser diode and a DVD laser diode, and creates a composite CD/DVD laser beam u... | 10/30/2007 |
| 7280457 | Optical disc with an improved compound lens The present invention relates to an optical pickup and a disc drive for preventing aberrations of laser light due to variations in temperature and humidity to ensure satisfactory characteristics of the laser light. A compound lens (14) is disposed in the opti... | 10/09/2007 |
| 7215476 | Optical pickup, optical information recording/reproducing apparatus using the same, and phase variable wave plate used in the pickup and the apparatus Laser beams respectively emitted from a SHG blue laser unit and a red semiconductor laser unit that have photo detectors respectively are turned into parallel lights by a collimator lens and then coupled by a dielectric multi-layer film mirror so as to be propagated... | 05/08/2007 |
| 7185989 | Color separation device, imaging optical engine, and projection apparatus A color separation device according to the present invention comprises a first color separation member having a first polarization direction changing element and a second polarization direction changing element, and a first polarization separation element, and a sec... | 03/06/2007 |
| 7184386 | Integrated type optical head with sheet waveguide and light coupler An integrated optical head is provided. In the integrated optical head, a light source emits light. A waveguide guides the light. An input coupler is located at one edge of the waveguide, and couples light emitted from the light source and transmits the coupled ligh... | 02/27/2007 |
| 7180668 | Optical pickup device and optical disc device This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into zeroth-order light, plus-first-order light and minus-f... | 02/20/2007 |
| 7177258 | Optical pickup apparatus, optical data recording/reproducing apparatus, and optical data recording/reproducing method An optical pickup apparatus used in an optical data recording/reproducing apparatus for reading/reproducing data on an optical recording medium, including a light source, a diffracting device configured to transmit a light beam and to diffract a light beam reflected... | 02/13/2007 |
| 7171096 | Non-volatile optical memory element utilizing optically induced magnetization reversal and operational method thereof The present invention relates to a high-speed optical memory element. In order to increase speed of a memory element, optical pulse is recorded and read all-optically without conversion into electrical signal at very high speed. Optically-induced spin accumulation i... | 01/30/2007 |
| 7161567 | Light emitting device and apparatus using the same A mold part formed of a light transmitting material having a high refractive index is molded in a concave-shaped reflecting member, and a light emitting element such as an LED chip or the like is inserted in the center of the mold part. A circular direct emitting po... | 01/09/2007 |
| 7130120 | Prism, projection and optical component An apparatus for transmitting or reflecting incident light. The apparatus includes a pair of diffraction grid substrates; a substantially grid-shaped diffraction grid formed of metal, wherein the diffraction grid is disposed between the substrates; and a pair of adh... | 10/31/2006 |
| 7113471 | Optical pickup device with a plurality of laser couplers An optical pickup device with the capability to read data from and write data to different kinds of optical discs in different formats and a composite optical device used in the optical pickup device. An optical pickup device is made by combining two laser couplers ... | 09/26/2006 |
| 7106681 | Optical head arrangements with single substrate lasers An optical head with a plurality of semi-conductor laser chips for use in reducing inclination or gradient of more than one beam presently falling onto a focusing lens is disclosed. To this end, a double mirror or alternatively beam reshaping means is disposed which... | 09/12/2006 |
| 7088645 | Optical pickup apparatus compatible with different types of optical recording mediums A polarizing beam splitter for separating an upstream beam from a downstream beam according to the polarization of an incident beam is provided between first and second light sources emitting laser beams at respective wavelength and an objective lens. A phase plate ... | 08/08/2006 |
| 7088664 | Reflection type compound prism and optical pickup apparatus employing the same A reflection type compound prism and an optical pickup apparatus employing the same. As a light beam is passed through the compound prism, a size of the light beam in a direction perpendicular to a reference plane is reduced by a first reflection surface, propagated... | 08/08/2006 |
| 7035196 | Optical head device and optical recording and reproducing apparatus having lasers aligned in a tangential direction A semiconductor laser element has the following configuration: a dual-wavelength monolithic laser where semiconductor lasers with emission wavelengths of 650 nm and 780 nm are integrated on one chip is soldered on a heat sink which then is soldered on a can package.... | 04/25/2006 |
| 7027369 | Optical pickup apparatus for simultaneously reading data from a plurality of tracks of an optical disc An optical pickup apparatus (10) for reading data from a plurality of tracks of an optical disc (34) at the same time by focussing spots (M, . . . ) of each light beam on a plurality of tracks, passing the reflected light beams of spots (M, . . . ) seq... | 04/11/2006 |
| 7020063 | Optical pickup An optical pickup comprising: a diffraction grating, a beam splitter and laser beam guiding optical components that change direction of laser beams, which are placed on a light path constituted by a semiconductor laser that emits dual wavelength laser beams and an i... | 03/28/2006 |
| 7009916 | Optical pickup device An optical pickup device including a lead frame and a board attached to the lead frame is provided. The lead frame includes optical components, such as a laser diode and an optical element, which are disposed within a lead frame. A photo diode is mounted on the boar... | 03/07/2006 |
| 7009928 | Optical scanning device with two-wavelength laser for HD and LD scanning In an optical scanning device for scanning both a high-density, HD, record carrier (38) and a low-density, LD, record carrier (18), a two-wavelength diode laser (50) is used for generating the HD scanning beam and the LD scanning beam. By arrang... | 03/07/2006 |
| 6987614 | Optical pickup and optical disc drive device This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into zeroth-order light, plus-first-order light and minus-f... | 01/17/2006 |
| 6970412 | Diffraction type lens which converges two wavelengths of light A diffraction type lens in an optical pickup apparatus for recording and reproducing two or more kinds of optical recording media is constituted by a substrate having one surface formed with a zone plate exhibiting a smaller converging action with respect to a wavel... | 11/29/2005 |
| 6967919 | Method and apparatus for optical head and optical information reproducing An optical head for reproducing information contained on an optical information disk includes a plurality of light sources and a plurality of light receiving elements in correspondence with the plurality of laser light sources. There is constructed a constitution in... | 11/22/2005 |
| 6956807 | Optical head for scanning a record carrier A device for scanning a first and second type of optical record carriers (2; 40) generates a first and a second radiation beam for scanning the first and second type of record carriers, respectively, the first radiation beam having a first numerical aperture ... | 10/18/2005 |
| 6956811 | Optical recording and/or reproducing apparatus In an optical recording/reproducing apparatus, the apparatus includes a moving unit moving above a recording medium by operation of a driving unit; a slider fixedly installed at a free end of the moving unit; a head lens unit including an objective lens installed at... | 10/18/2005 |
| 6947367 | Single means for converting beam widths of plural laser beams with different entry and exit angle with offset A low-profile optical disk device which performs recording and reproducing using a plurality of laser light sources with different wavelengths, without thug need for additional components. It is used as a DVD-Ram, CD-R or the like. It comprises a plurality of neighb... | 09/20/2005 |
| 6930975 | Optical irradiation head and information recording/reproducing device An optical irradiation head including a trapezoidal prism having a pair of trapezoidal principal surfaces parallel to each other, a rectangular bottom surface, a rectangular top surface parallel to the rectangular bottom surface, and a pair of oblique side surfaces ... | 08/16/2005 |
| 6909687 | Optical pickup with a diffraction element consist of six regions providing spatial variation corresponding to a focas state A six-segment holographic surface is divided into regions by dividing lines. A four-segment photodetection part is divided into four photodetection parts equal in area by a section line substantially parallel to the radial direction of an optical disk and a section ... | 06/21/2005 |
| 6906991 | Optical head, optical recording and/or reproducing apparatus and integrated optical module An optical head includes a light emitter/detector to emit a laser light towards an optical disc and to detect a return light from the optical disc, a diffraction grating to split the laser light into three beams, and a light converging optical system to focus the la... | 06/14/2005 |
| 6876621 | Optical apparatus for recording/reproducing and reading/reproducing data on an optical recording medium, and method for using same An optical pickup apparatus used in an optical data recording/reproducing apparatus for reading/reproducing data on an optical recording medium, including a light source, a diffracting device configured to transmit a light beam and to diffract a light beam reflected... | 04/05/2005 |
