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| Number | Title | Issue Date |
| 8184520 | Optical pickup device having chromatic aberration correction lens An optical pickup device includes a light source to emit light, an objective lens to focus the light on a recording medium to form a light spot, an optical path changer on an optical path between the light source and the objective lens to change the path of incident... | 05/22/2012 |
| 8179768 | Optical system for compensating for spherical aberration and/or coma aberration in an optical pickup device and optical pickup device having the same An optical system for optical pickup, which optical system is used for performing recording, reproducing, and/or erasing of information on an optical recording medium and has a simple configuration, is provided. An optical pickup device 1 includes a collimato... | 05/15/2012 |
| 8169880 | Optical pickup having radially arranged lenses in a low profile construction An optical pickup includes a first source which emits a first beam with a first wavelength; a second source which emits a second beam with a wavelength shorter than the first wavelength; a first collimate lens which collimates the first beam; a second collimate lens... | 05/01/2012 |
| 8169879 | Optical recording system to record information with light A multilayer optical recording system to record information with light includes a lens unit, a recording medium, and a microscopic drive unit. The lens unit includes a metamaterial lens or a plasmon lens. The metamaterial lens has a first dielectric member in which ... | 05/01/2012 |
| 8154980 | Object lens driving apparatus and manufacturing method thereof An objective lens driving apparatus includes an objective lens (13) collecting a light flux emitted from a light source on a optical disk (11), and a lens holder (14) holding the objective lens (13). The lens holder (14) includes a... | 04/10/2012 |
| 8130624 | Optical head device for forming light spot on disc-shaped information medium An optical head device has at least one upward-reflecting mirror, objective lenses, an objective lens actuator, and a moving mechanism. The upward-reflecting mirror receives an incident luminous flux having a wavelength emitted from a semiconductor, and changes its ... | 03/06/2012 |
| 8130625 | Optical information recorder/reproducer, optical information recording/reproducing method and control circuit A distance control circuit keeps constant the distance between a condensing member and the surface of an optical disk using return light from a region where near field light is generated. Additionally, a focus control circuit controls the focus position of the near ... | 03/06/2012 |
| 8089850 | Optical pickup, optical disc apparatus, integrated coupling lens, integrated prism, and optical information equipment An optical pickup is provided for directing a blue-violet laser beam to access a first information recording medium covered with a first transparent substrate or a second information recording medium covered with a second transparent substrate, which includes a ligh... | 01/03/2012 |
| 8077585 | Condenser lens for an objective lens system An objective lens system for an optical pickup apparatus, includes in order from an object side: a first lens group having negative paraxial power P1 (mm−1); and a second lens group having positive paraxial power P2 (mm−1 | 12/13/2011 |
| 8072870 | Optical pickup and optical disc drive The present invention provides an optical structure of an optical pickup for adjusting an exit light quantity of a light source, so as not to have adverse effect on reliability of semiconductor laser to be suited to the quantity of light. The exit light quantity of ... | 12/06/2011 |
| 8059516 | Method and apparatus for recording/reproducing holographic information Provided are a method and apparatus for recording/reproducing holographic information. The apparatus for recording/reproducing holographic information includes an optical pickup which irradiates light on a holographic information storage medium and receives irradiat... | 11/15/2011 |
| 8031576 | Optical pickup device An optical pickup device according to the present invention includes: a first light source that outputs a first laser beam; a second light source that outputs a second laser beam; and an optical system that irradiates an information medium with the first and second ... | 10/04/2011 |
| 8014258 | Optical pickup having radially arranged lenses in a low profile construction An optical pickup includes a first source which emits a first beam with a first wavelength; a second source which emits a second beam with a wavelength shorter than the first wavelength; a first collimate lens which collimates the first beam; a second collimate lens... | 09/06/2011 |
| 8004956 | Optical disc drive, optical pickup and optical component used therefor Provided are an optical pick up and an optical component used for the optical pickup which are capable of preventing or restraining occurrence of deviation and unbalance which are caused by assembly errors during manufacturing of optical components, a temperature va... | 08/23/2011 |
| 7969853 | Optical pickup device A servo objective lens and a recording/reproducing objective lens are commonly held on a holder. The servo objective lens and the recording/reproducing objective lens are integrally displaced, thereby pulling servo light onto a servo layer. Upon the pulling, focus p... | 06/28/2011 |
| 7969852 | Optical pickup apparatus An optical pickup apparatus includes: a first light source; a second light source; a light-converging optical system including a coupling lens and an objective lens; and a photodetector. The optical pickup apparatus is capable of recording and/or reproducing informa... | 06/28/2011 |
| 7944799 | Optical information apparatus with gap control system An optical information apparatus according to the present invention includes: an optical system that includes a solid immersion lens (SIL) 11 and that produces near-field light to be incident on an optical disc 10; a first actuator for displacing the S... | 05/17/2011 |
| 7929402 | Optical pickup, optical information recording device, optical information recording method, optical information reproduction device, optical information reproduction method and optical information recording medium An optical pickup includes: an objective lens that collects a first beam and a second beam and emits the first and second beam toward an optical information recording medium on which information can be recorded as a recording mark as a result of being exposed to the... | 04/19/2011 |
| 7924687 | Optical system for collimating elliptical light beam and optical device using the same An optical system (20) for efficiently collimating an elliptical light beam includes a light source (21), a first lens (22), a second lens (23), and a third lens (24). The light source is adapted for providing an elliptical light b... | 04/12/2011 |
| 7924688 | Optical pickup and manufacturing method for optical pickup An optical pickup includes a first objective lens, a second objective lens having a numerical aperture different from that of the first objective lens, and an objective lens holder that holds the objective lenses. The first objective lens is attached to the objectiv... | 04/12/2011 |
| 7889621 | Objective lens device, optical pickup device, optical-disc driving device and driving method of objective lens An objective lens device includes: a first objective lens having a first numerical aperture, which can condense light into a disc-shaped first optical recording medium including a first cover layer of first thickness; a second objective lens having a second numerica... | 02/15/2011 |
| 7852737 | Optical pickup An optical pickup includes a first objective lens, a second objective lens having a numerical aperture different from that of the first objective lens, and an objective lens holder. The first objective lens is attached to the objective lens holder via a spacer that ... | 12/14/2010 |
| 7835253 | Actuator having a plurality of objective lenses installed in a lens holder used with an optical pickup An actuator used with an optical pickup includes: a base on which a holder is fixed; a lens holder in which a plurality of installation holes are formed such that a plurality of objective lenses to record and/or reproduce optical discs having different recording den... | 11/16/2010 |
| 7733760 | Optical pickup having radially arranged lenses in a low profile construction An optical pickup includes a first source which emits a first beam with a first wavelength; a second source which emits a second beam with a wavelength shorter than the first wavelength; a first collimates lens which collimates the first beam; a second collimate len... | 06/08/2010 |
| 7733759 | Optical pickup and optical disc apparatus An optical system is disclosed including an optical pickup having a wavefront aberration-correcting element capable of correcting coma aberration and astigmatism, and an optical disc apparatus which uses the optical pickup. The optical pickup includes a laser light ... | 06/08/2010 |
| 7680015 | Optical disk apparatus compatible with different types of mediums adapted for different wavelengths 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 ... | 03/16/2010 |
| 7668066 | Optical pickup apparatus An optical pickup apparatus for information recording and/or reproduction on different optical information recording media with compatibility among these media, the optical surface of a first objective lens and the optical surface of a second objective lens are form... | 02/23/2010 |
| 7656774 | Objective lens, optical head, and optical pickup apparatus An objective lens for at least one of recording and reproducing for an optical information recording medium includes in the order from a light source side: a first lens group having negative refracting power, which is in a meniscus shape having a concave surface fac... | 02/02/2010 |
| 7636293 | Optical pickup device, recorder and/or reproducer An optical system and pick-up device having an optical magnification suitable for three different optical disc formats and a light emitting means for emitting a laser beam having a wavelength corresponding to each disc in the optical system of the optical pickup for... | 12/22/2009 |
| 7623435 | Optical pickup device, and information recording and reproduction device A sufficient S/N ratio in reproduction of an optical disk is achieved without complexing a circuit structure even if a data recording speed relative to the optical disk is increased. When data is recorded into an optical disk (DK), in an information recording and re... | 11/24/2009 |
| 7613099 | Solid immersion lens, condensing lens, optical pickup device, optical recording and reproducing apparatus and method of forming solid immersion lens A solid immersion lens has an inclined portion formed on at least a part thereof from the tip end portion of the objective side to a spherical portion and an inclination angle θ is expressed as θ≧θi where θi represents the angle of incidence of light incident ... | 11/03/2009 |
| 7593307 | Objective optical system for optical pickup apparatus, optical pickup apparatus, driving apparatus for optical information recording medium, condenser lens and optical path compounding element An objective lens system for an optical pickup apparatus, includes in order from an object side: a first lens group having negative paraxial power P1 (mm−1); and a second lens group having positive paraxial power P2 (mm−1 | 09/22/2009 |
| 7558181 | Optical information recording/reproduction apparatus Provided is an optical information recording/reproduction apparatus in which a tilt margin in a radial direction of an optical disk is increased to thereby reduce a danger that the optical disk and a solid immersion lens come into contact with each other as compared... | 07/07/2009 |
| 7545726 | Optical disc drive An optical disc drive includes a light source and an objective optical system for condensing a light from the light source onto a recording surface of an optical disc. A chassis which is movable radially of the optical disc supports both the light source and the obj... | 06/09/2009 |
| 7505390 | Compatible optical pickup A compatible optical pickup includes a light source which emits a first light beam having a wavelength for a first recording medium; a twin light source which emits second and third light beams respectively having wavelengths for second and third recording media; a ... | 03/17/2009 |
| 7444047 | Multiplexing optical system A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have been emitted from semiconductor lasers. The first condensing lens conden... | 10/28/2008 |
| 7440383 | Optical pickup device and recording and/or reproducing apparatus An optical pickup device includes an objective lens (2), with a numerical aperture (NA) being not less than 1, having a solid immersion lens (1) which is made up by a spherical portion (1a) and a flat portion (1b) parallel t... | 10/21/2008 |
| 7426171 | Optical lens, condenser lens, optical pickup, and optical recording/reproducing apparatus Disclosed herein is an optical lens suitable for a near-field optical recording/reproducing system. A condenser lens, optical pickup, and optical recording/reproducing apparatus each using this optical lens are also disclosed. This optical lens is formed from an SiC... | 09/16/2008 |
| 7417935 | Optical system having an objective system and an optical aberration correcting element An optical system for use in an optical pickup device for recording and/or reproducing information on an optical recording media, the optical system having an optical axis and comprising: an objective system for converging a light beam emitted from a light source on... | 08/26/2008 |
| 7417939 | Optical pickup including aberration correction lens assembly An optical pickup records information on an optical recording medium and retrieves information from the optical recording medium by radiating a light beam on the optical recording medium. The optical pickup includes a light source which emits the light beam. The opt... | 08/26/2008 |
