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"Flight by machines heavier than air is unpractical and insignificant, if not utterly impossible."
Simon Newcomb, astronomer ; Said in 1902, less than two years before the first flight at Kitty Hawk
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| Number | Title | Issue Date |
| 7911926 | Optical disc drive A tracking error signal is generated with stability without being easily affected by a distribution fluctuation of light reflected from an optical disc or by a lens shift. An optical disc drive according to the present invention includes: an objective lens | 03/22/2011 |
| 7889624 | Optical information recording-reproduction apparatus An optical information recording-reproducing apparatus for effecting at least one of recording of information on and reproducing of information from an optical recording medium. A light source emits a light beam. An objective lens and a solid immersion lens receive ... | 02/15/2011 |
| 7764589 | Confocal optical system aperture detector that measures a light quantity balance of light received to detect a position displacement, and a confocal optical system aperture position controller, an optical head and a position detecting method performing the same In a confocal optical system having a light source 13, a first focusing means 14, a second focusing means 16, an aperture 17, and a detector 18 including a plurality of light reception regions, a position displacement is detected b... | 07/27/2010 |
| 7639591 | Photodetector and optical pickup apparatus A light detecting apparatus includes a first photodetector for receiving 0th reflected light from a first information surface, a second photodetector proximate to the first photodetector for receiving the reflected light of a positive higher-order diffrac... | 12/29/2009 |
| 7602692 | Near-field optical probe for reproducing information on a recording medium using near-field light A near-field optical probe has a planar substrate formed with a through-hole and a phase shifter layer translucent to light having a wavelength of illumination light used to illuminate the substrate for producing near-field light. The phase shifter layer is effectiv... | 10/13/2009 |
| 7471612 | Recording medium having substrate with thickness dependent on numerical aperture of object lens, method of forming the optical medium and optical recording/reproducing apparatus A high density optical disc that can be driven changeably with the existent optical disc by the same driving apparatus. On the recording surface of the optical disc, a light transmissive layer with a thickness of about 0.2 to 0.4 mm is formed. The recording face is ... | 12/30/2008 |
| 7406007 | Optical disc apparatus and spherical aberration correction controlling apparatus An optical disc apparatus is provided, which comprises a lens tilting section for tilting an objective lens to correct coma aberration occurring in a light beam spot focused on an information surface of an optical disc, a spherical aberration correcting section for ... | 07/29/2008 |
| RE40329 | Single objective lens for use with CD or DVD optical disks An optical disk reader or read/write system for CD or DVD formats. First and second laser diodes operating at different wavelengths have their output beams collimated and directed at a single element objective lens, and are then reflected off the disk back through t... | 05/20/2008 |
| 7372784 | Optical head apparatus The present invention proposes an optical head apparatus provided with light-blocking structure that can reliably prevent nonessential light from reaching the photo detector, without being an impediment to miniaturization and flattening, moreover, without increasing... | 05/13/2008 |
| 7372794 | Compatible optical pickup applying tilt to objective lens in proportion to radial movement of objective lens A compatible optical pickup compatibly using a high density recording medium and at least one low density recording medium, includes an objective lens to form a light spot suitable for use on a recording surface of the high density recording medium by focusing a cor... | 05/13/2008 |
| 7359295 | Optical pickup apparatus and optical disk drive apparatus An optical pickup apparatus for reproducing information from an optical disk, includes: a semiconductor laser applying a beam to an optical disk having two recording layers through an objective lens; and a light receiving device to which light reflected from the opt... | 04/15/2008 |
| 7342869 | Optical-recording medium playback apparatus and optical-recording medium, including flying optical head features An optical-recording-medium playback apparatus includes a first optical member which focuses light emitted from a light-emitting unit on an optical recording medium, a second optical member which focuses light reflected by the optical recording medium, a light-recei... | 03/11/2008 |
| 7339876 | Optical system of optical pick-up There is provided an optical system of an optical pick-up for recording/reproducing data to/from at least two types of optical discs including a first optical disc and a second optical disc whose recording density is higher than that of the first optical disc. The o... | 03/04/2008 |
| 7330404 | Near-field optical transducers for thermal assisted magnetic and optical data storage An optical transducer comprises an optical element for directing an electromagnetic wave to a focal region and a metallic nano-structure having a longitudinal axis substantially parallel to an electric field of the electromagnetic wave, the metallic nano-structure b... | 02/12/2008 |
| 7301888 | Recording apparatus In a recording apparatus for reproducing information recorded on a recording medium by utilizing near-field light, the recording apparatus realizes reliable information reproduction with a simple structure. Illumination light 20 is illuminated to the recordin... | 11/27/2007 |
| 7301858 | Optical head device Disclosed is an optical head device including: an object lens; an actuator displacing the optical lens; a mirror which has a reflection plane to bend a direction of a light traveling on an optical axis of the object lens, and on a back of the reflection plane, a rea... | 11/27/2007 |
| 7274649 | Holographic ROM system A holographic ROM system of the present invention includes a lens unit for filtering and collimating an output radiation diffracted from a holographic disk in order to produce an output data beam. The lens unit includes an objective lens for collimating the output r... | 09/25/2007 |
| 7272099 | Exposure apparatus of an optical disk master, method of exposing an optical disk master and pinhole mechanism An exposure apparatus of an optical disk master having a laser source, a deflector for deflecting a recording laser beam obtained based on the laser beam of the laser source and an objective lens for focusing the recording laser beam on an optical disk master, has a... | 09/18/2007 |
| 7260047 | Optical pickup that uses light sources with different wavelengths for each of multiple recording mediums An optical pickup includes: a first projector for projecting a first light beam of a first wavelength so as to record and reproduce information with respect to an optical disk having a first light transmissive layer; a second projector for projecting a second light ... | 08/21/2007 |
| 7239597 | Lens for optical recording and reproducing system A lens for an optical recording and reproducing system includes: a plane of incidence on which a light generated from a light source is made incident; a first reflection side for reflecting a light passing through a plane of incidence; and a second reflection side f... | 07/03/2007 |
| 7224662 | Objective lens for optical pickup An objective lens for an optical pickup is configured such that, when a light beam having a wavelength corresponding to the optical disc requiring the higher NA is converged on the optical disc requiring the higher NA at the higher NA, the phase of light flux passed... | 05/29/2007 |
| 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 |
| 7193953 | Holographic recording and reconstructing apparatus and mask for use therein In a holographic recording apparatus having a hologram medium for storing an interference pattern between a reference beam and a modulated signal beam, a double-layered mask for modulating a signal beam with data to generate the modulated signal beam has a first and... | 03/20/2007 |
| 7180844 | Holographic disc recording system A holographic disc recording system for recording, in the form of holograms, information stored on a source disc onto a target disc includes a conical beam shaper which transforms a reference beam into a conical beam having a substantially cylindrically symmetrical ... | 02/20/2007 |
| 7177550 | On-axis laser receiver wavelength demultiplexer with integral immersion lensed detectors The present invention is directed to a laser communication receiver for wireless optical communication. A laser communication receiver includes a diffractive optical element to permit detectors at different spatial locations to detect different wavelengths of the op... | 02/13/2007 |
| 7170846 | Light receiving and emitting unit and optical pickup using the same A light receiving and emitting unit has a plurality of light sources, a light receiving element, a light control unit, and an optical block. The optical block has at least a first and a second member formed of a material having birefringent property, and a third mem... | 01/30/2007 |
| 7170844 | Optical pick-up apparatus and correction lens for use in the apparatus In an optical pick-up apparatus for recording to or reproducing from an optical information recording medium, the optical pick-up apparatus includes: a light source for emitting light flux; a light converging optical system having an aperture and an objective lens a... | 01/30/2007 |
| 7167433 | Scanning apparatus for fluorescent multi-layer storage The invention relates to a scanning apparatus for scanning information in an information carrier (16) comprising a plurality of layers for storing data on a material capable of generating an excited radiation when interacting with an exciting beam (13)... | 01/23/2007 |
| 7167292 | Spectroscope and confocal scanning microscope comprising thereof The invention provides a spectroscope that provides variable masks 24a and 24b that limits the light path of separated light beams in the spectrum direction and composite masks 24c and 24d that limit the same i... | 01/23/2007 |
| 7155732 | Heat assisted magnetic recording head and method A magnetic recording head comprises a write pole having a pole tip adjacent to an air bearing surface, a return pole, a near field transducer positioned adjacent to the air bearing surface for producing near field radiation for heating a portion of a magnetic storag... | 12/26/2006 |
| 7154837 | Optical pickup and optical information recording/reproducing device An optical pickup and an optical information recording/reproducing device are provided, each of which is capable of forming a super-resolution spot to conduct micro-mark recording, and does not undergo signal degradation due to an increased sidelobe in a reproducing... | 12/26/2006 |
| 7131128 | Optical actuator An optical pickup actuator for use with a recording medium includes a swing arm pivoting in a tracking direction with respect to the recording medium, a first driving unit pivoting the swing arm, an optical pickup facing the recording medium, an elastic member havin... | 10/31/2006 |
| 7120095 | Apparatus for generating seek direction detecting signal using track error and track cross signals for an optical pickup An apparatus to generate a seek direction detecting signal for an optical pickup to determine a position of a center of an optical spot focused on an optical disk relative to a center of a track, which focuses a main beam on a first optical detector and a sub-beam h... | 10/10/2006 |
| 7116619 | Optical disc drive apparatus, method for measuring tilt of an optical disc, and method for correcting tilt of an optical disc Tilt (θ(r, φ)) is measured in a measuring location (P(r, φ) optical disc (2). A pivotable objective lens (34) is brought to a first focus measuring location such as to focus a light beam (32) in a first anchor point (P1(r−Δr1... | 10/03/2006 |
| 7088659 | Optical disk apparatus and tilt detection method An optical disk apparatus includes a laser diode, and a light from the laser diode becomes a parallel light by a collimator lens, which is reflected toward an object lens by a reflection mirror. The parallel light transmitted through a through-hole provided on an ob... | 08/08/2006 |
| 7085220 | Optical head and optical device for enhancing the intensity of a transmitted light A optical device including conductive films having a first and second surfaces, one hole, surface specific shapes periodically, and a layer inserted as an intermediate layer between the first and the second surface of conductive films. The intermediate layer has the... | 08/01/2006 |
| 7075597 | Dual-screen liquid crystal display The present invention provides a dual-screen liquid crystal display including three substrates. The first substrate has a first surface and a second surface. The first reflector layer, the first liquid crystal layer, the second substrate and the first polarization f... | 07/11/2006 |
| 7068588 | Optical disk medium having a predetermined change in the tilt of the surface An optical disk medium and a drive system are provided that enable high density recording to be carried out. In the optical disk medium, recorded information tracks are formed in a concentric or spiral manner, and information is recorded and played back by irradiati... | 06/27/2006 |
| 7054256 | High capacity digital data storage by transmission of radiant energy through arrays of small diameter holes A storage media for storage of data thereon is provided. The storage media including: a first layer, the first layer being substantially transparent to a predetermined radiant energy used for reading the data; and a second layer formed on the first layer and being s... | 05/30/2006 |
| 7050385 | Optical recording medium An optical recording medium comprising at least a land and a groove where information-recording/reproducing is carried out by a flying type optical head, The optical recording medium keeps the flying height of the flying optical head constant in the entire region of... | 05/23/2006 |
