Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7956312 | Optical disc device An optical disc device comprising: first and second laser diodes to radiate first and second laser beams with different first and second wavelengths, respectively; a first objective lens to irradiate the first laser beam to reflection area to read out image recordin... | 06/07/2011 |
| 7915569 | Method for calibrating focus level on a light scribe disc A method for calibrating a focus level on a light scribe disc includes driving a pick-up head with a predetermined speed in a predetermined direction to calibrate a focus level for a moving stage, detecting light summed signals along the light path of the moving sta... | 03/29/2011 |
| 7755014 | Optical pickup device An optical pickup device is equipped with a diffraction element (8) that includes liquid crystal, two transparent electrodes sandwiching the liquid crystal, and a liquid crystal control portion (21) with electrodes connected electrically to the transpa... | 07/13/2010 |
| 7750276 | Optical information detecting method, optical head, and optical disc apparatus utilizing plural photodetectors In multilayer optical discs and high-speed optical discs, the amount of reproduction light per unit time greatly decreases and the reproduction signal quality (S/N) significantly drops due to the low effective reflectivity and the short read time of the medium. Thes... | 07/06/2010 |
| 7718939 | Optical pickup apparatus An optical pickup apparatus includes a light source to emit light of a predetermined wavelength, an objective lens to focus the light emitted from the light source to form a light spot on an optical disc having a plurality of recording layers, a photodetector to det... | 05/18/2010 |
| 7671312 | Optical pickup system, optical system, and optical information recording medium The present invention provides an optical pickup system including a first light source emitting a light flux with a first wavelength; a second light source emitting a light flux with a second wavelength; and a light-converging optical system converging the light flu... | 03/02/2010 |
| 7595472 | Optical head device An optical head device includes a light source which emits a light beam, an objective lens which condenses the light beam on the optical disk, a condensing lens which condenses reflected light from the optical disk, a liquid crystal panel disposed near a focal point... | 09/29/2009 |
| 7569801 | Optical head, optical reproducing apparatus, and optical recording and reproducing apparatus An optical head, capable of performing output control for a light source without weakening an intensity of a light beam for recording and reproduction even if an optical element is not added anew, and an optical recording and reproducing apparatus including the opti... | 08/04/2009 |
| 7550700 | Light-receiving semiconductor device and optical pickup device According to an embodiment of the present invention, a semiconductor device used in an optical disk device driving an optical disk, includes: an optical pickup device detecting an optical signal irradiated to the optical disk and converting the detected optical sign... | 06/23/2009 |
| 7547868 | Optical near-field generating apparatus and method and information recording and reproducing apparatus An optical near-field generating apparatus includes a conductive scatterer causing an optical near-field based on a surface plasmon to be generated by being illuminated by incident light, and a conductive body arranged in a vicinity of the scatterer and generating a... | 06/16/2009 |
| 7541564 | Optical pickup The invention relates to an optical pickup for an optical recording medium, an electrically controlled diffraction grating suitable for use in such a pickup, and to an apparatus for reading from and/or writing to optical recording media using such an optical pickup ... | 06/02/2009 |
| 7534981 | Optical semiconductor device having a shield wire and optical pickup device having a shield wire An optical semiconductor device of the present invention includes: a light-receiving element which converts light into an electric signal; an amplifier circuit having an input terminal to which the light-receiving element is connected, and which amplifies the electr... | 05/19/2009 |
| 7531773 | Auto-focus and zoom module having a lead screw with its rotation results in translation of an optics group An optical module includes a first optics group, a second optics group, and an image sensor, wherein the first optics group and second optics group are configured to provide an image having a focus and a magnification to the image sensor. In some embodiments of the ... | 05/12/2009 |
| 7531772 | Apparatus for translational displacement of a lens in a laser focussing optical system An apparatus is described for automatically shifting a lens of a laser focussing optical system, the lens undergoing translational motion along an optical axis, being moved by at least one motor which carries out rotational movement. This rotational movement is conv... | 05/12/2009 |
| 7514661 | Focus calibration in an optical drive Focus calibration in an optical drive. Optics are moved with respect to a disc in the optical drive. A first interface of the disc is optically detected at a first distance, and a first drive signal value is detected at the first interface. A drive signal change is ... | 04/07/2009 |
| 7498550 | Optical pickup apparatus which records and/or reproduces information using different types of optical information recording mediums An optical pickup apparatus for recording and/or reproducing information for an optical information recording medium, comprising a light converging optical system including a coupling lens and an objective lens, wherein a first diffraction structure is installed on ... | 03/03/2009 |
| 7470879 | Optical pickup, information processing apparatus and signal processing method An optical pickup for recording or reproducing information to an optical disk, includes: a first photodetector for detecting a return light from the optical disk, wherein the first photodetector is configured so that the first photodetector is divided into three por... | 12/30/2008 |
| 7435934 | Optical pickup apparatus which is compatible with multiple types of media An optical pickup apparatus includes a first objective lens having a low numerical aperture (NA) suitable for a low density recording medium, a second objective lens having a high NA suitable for a high density recording medium, a first light source that emits short... | 10/14/2008 |
| 7435936 | Light analyzer device and method for detecting objects utilizing the light analyzer device A light analyzer device and a method for detecting objects utilizing the light analyzer device are provided. The light analyzer device includes a focal plane array configured to receive the light that has passed through a light filter and to generate a first digital... | 10/14/2008 |
| 7432487 | Device for correcting output of optical pickup Light receiving elements for receiving a + one-dimensional light divided into four are arranged in the vicinity of a light receiving part for receiving the zero-dimensional light. Some light receiving elements configure the light receiving elements of a first group ... | 10/07/2008 |
| 7423246 | Analysis apparatus and analysis disc used for the same It is an object of the present invention to provide an analysis apparatus which can achieve an image with a proper contrast even from an analysis object on an analysis optical disc. When an image is obtained from an analysis object 111, a control unit (210... | 09/09/2008 |
| 7408143 | Previous amplifier circuit, light-receiving amplifier circuit, and optical pickup apparatus having grounded emitter amplifier circuits each with a grounded emitter transistor A previous amplifier circuit of the present invention includes: a grounded emitter amplifier circuit using a grounded emitter transistor connected to a light receiving device; another grounded emitter amplifier circuit using another grounded emitter transistor conne... | 08/05/2008 |
| 7405386 | Light receiving device for reading an optical medium with reducing influence of dark current and stray light performance Disclosed is a light receiving device for reading an optical medium compliant with any of different standards. The receiving device includes light receiving elements and an amplifier circuit. Each light receiving element is for receiving light reflected from an opti... | 07/29/2008 |
| 7405383 | Optical pickup device having three light sources with a holographic element for directing diffraction light to photodetectors An optical pickup device has three different light sources, a holographic element, beam splitters, and first and second photodetectors. The beam splitters each change an optical path of a light beam coming from the associated light source toward a recording medium a... | 07/29/2008 |
| 7394050 | Method of vertical deviation disc detection A method is provided to detect whether vertical deviation occurs as an optical disc spins in an optical disc player having a pickup head pre-installed in a balanced position at a focal distance. When moving towards and away from the balanced position, the pickup hea... | 07/01/2008 |
| 7394049 | Optical disk apparatus and pickup unit An optical disk apparatus includes a light emitting unit, a light detecting unit, a tracking error signal generating unit, and a tracking control unit. The light emitting unit emits a single light beam onto an optical disk. The light detecting unit includes at least... | 07/01/2008 |
| 7378627 | Semiconductor light receiving element and optical pick-up device having the semiconductor light receiving element A semiconductor light receiving element has: a semiconductor substrate; a plurality of photodiodes formed on the semiconductor substrate and configured to receive respective lights of different wavelengths; and an anti-reflection film provided on light receiving sur... | 05/27/2008 |
| 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 |
| 7366079 | Optical pickup device and optical disk drive using the same An optical pickup device includes a light source unit an optical system which leads a return light beam to a predetermined light-receiving location and includes an object lens focusing each light beam from the light source unit to a recording surface of a correspond... | 04/29/2008 |
| 7362667 | Optical information reproduction method and apparatus In an optical information reproduction apparatus having optical beam sources having at least two types of wavelengths, an object lens may be damaged by colliding with an information recording medium while driving a focus servo, which is caused by a fake signal gener... | 04/22/2008 |
| 7358471 | Optical head device An optical head device includes a light source which emits a light beam, an objective lens which condenses the light beam on the optical disk, a condensing lens which condenses reflected light from the optical disk, a liquid crystal panel disposed near a focal point... | 04/15/2008 |
| 7359307 | Catadioptric objective system and objective system A catadioptric objective system used for storage and/or reproduction of information by use of an optical near field. The catadioptric objective system is composed of a catadioptric objective lens and a light transmitting plate. The lens has a first surface and a sec... | 04/15/2008 |
| 7358470 | Optical pickup An optical pickup with a reflective coating device is provided, including a laser diode (LD), an optical element, and a photo detector integrated circuit (PDIC). The LD emits 1-3 lights with different wavelengths but the same polarization orientation. The beam trans... | 04/15/2008 |
| 7355932 | Optical disk device for detecting thickness errors of the transparent substrate The invention detects the thickness error of the transparent substrate using a general focus error signal detection system employing the fact that the reflecting light from the optical disk causes distortions in diffraction image at the detection plane or unsymmetri... | 04/08/2008 |
| 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 |
| 7349299 | Method of optical disc discrimination A method for discriminating between different types of optical discs is intended to apply to an optical storage device with a pick-up head having three beams. A main beam push-pull signal and a sub-beam push-pull signal, both acquired by means of the photo-detector ... | 03/25/2008 |
| 7349298 | Optical disc drive including detection and correction of spherical aberration The optical disc drive reads and/or writes data from/on an optical disc having an information storage layer. In an optical disc drive 100, light from a light source 3 is focused by a focusing section 1, and each of the peripheral and non-periphe... | 03/25/2008 |
| 7348548 | Image forming apparatus and image forming method A printer has a laser emitter for emitting a laser beam to irradiate a surface of a photosensitive member; a reflector, disposed at a position on a laser beam path defined by the laser emitter and the photosensitive member, for reflecting the laser beam emitted by t... | 03/25/2008 |
| 7348529 | Optical device and optical pickup device An optical device diffracts incident light with a hologram element 19 and receives the diffracted light with light receiving regions 20A to 29 on a light receiving element 12. The light receiving element 12 separately receives refl... | 03/25/2008 |
| 7345266 | Optical medium judging method for avoiding the collision of an objective lens with a disk The present invention relates to an optical medium judging method for avoiding the collision of an objective lens with a disk or the failure to judge a warped disk when the optical disk drive judging the disk. This method will move the objective lens so as to obtain... | 03/18/2008 |
