Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 8081558 | Optical system of optical pick-up and optical information recording/reproducing apparatus An optical system of an optical pick-up including a resin coupling lens and a resin objective lens with NA larger than 0.8, wherein, magnification β satisfies a condition: −0.13 | 12/20/2011 |
| 7821906 | Objective lens for optical pick-up An objective lens for an optical pick-up which is used to record data to and/or to reproduce data from at least three types of optical discs by selectively using one of at least three light beams having different wavelengths is provided. When thicknesses of a first,... | 10/26/2010 |
| 7342851 | Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelen... | 03/11/2008 |
| 7330420 | Objective lens unit, optical pickup apparatus and optical information recording and reproducing apparatus An objective lens unit for use in an optical pickup apparatus, includes a first optical element arranged opposite to the optical information recording medium; a second optical element arranged at a light source side of the first optical element opposite to the first... | 02/12/2008 |
| 7266070 | Objective lens for different optical recording media and an optical pickup device utilizing it An objective lens and an optical pickup device utilizing it are disclosed wherein the objective lens includes a specified aspheric surface profile having a discontinuity and a single specified diffraction optical surface so to provide a focusing effect which is usab... | 09/04/2007 |
| 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 |
| 7209427 | Optical pickup with reduced size An optical pickup having a light-emitting element, an objective lens unit, a reflecting mirror and a light-receiving element, emits a beam onto an optical recording medium and uses a reflected beam to read recorded information. In the objective lens unit, a central ... | 04/24/2007 |
| 7190658 | Optical element having a plurality of ring-shaped zones An optical element-for use in an optical pickup apparatus for converging a light flux onto an information recording plane of an optical information recording medium, is provided with an optical path difference providing section divided coaxially around an optical ax... | 03/13/2007 |
| 7126905 | Information recording medium and information recording/reproducing apparatus to increase recording density An information recording medium 101 includes: a transparent substrate 109 having a first surface A and a second surface B opposite to the first surface A; reflectance reduction means 110 provided on the first surface A of the transparent substra... | 10/24/2006 |
| 7102980 | Optical pickup apparatus and objective lens An objective lens of an optical pickup apparatus converges a divergent light flux onto an information recording surface. The following conditional formula is satisfied: |δSA1/δU|·|δU|+|δSA2/δT|·|δT|≦0.07... | 09/05/2006 |
| 7099264 | Flat-plate lens The invention discloses a flat-plate lens to be built in an optical recording medium for improving the image-forming characteristics of the recording medium. The flat-plate lens of the invention comprises a layered thin film having a periodical structure in the dire... | 08/29/2006 |
| 7079473 | Objective lens, optical pickup apparatus and recording reproducing apparatus An objective lens for use in an optical pickup apparatus has two positive lenses of a first lens arranged at a light source side and a second lens arranged at an information recording medium side and the objective lens comprises a first surface being a light source ... | 07/18/2006 |
| 7079331 | Device for holding a beam splitter element The invention relates to a device for holding a beam splitter element having an optically active beam splitter layer in an optical imaging device, the beam splitter element being connected to at least one support element that is fastened in the housing of the imagin... | 07/18/2006 |
| 7079457 | Method of reproducing information with equalization coefficient for the reproduced information A method of reproducing information by scanning information marks, disposed with a predetermined mark pitch therebetween and recorded on tracks inside a predetermined information recording region, by an optical spot. The method includes detecting the size of the opt... | 07/18/2006 |
| 7075880 | Optical pick-up device and objective lens used therein An optical pickup apparatus conducts recording or reproducing information for an information recording plane of a first or second optical information recording medium and comprises a first light source and a second light source mounted on a same base board; a conver... | 07/11/2006 |
| 7012876 | Optical scanning head An optical head (1) for scanning optical record carriers (2) is provided with a compensator (16) for compensating spherical aberration of the objective system (18) or defocus of the collimator lens (14) caused by operation of the o... | 03/14/2006 |
| 6999221 | Bimorphic polymeric photomechanical actuator A bimorphic polymeric photomechanical actuator, in one embodiment using polyvinylidene fluoride (PVDF) as a photosensitive body, transmitting light over fiber optic cables, and controlling the shape and pulse duration of the light pulse to control movement of the ac... | 02/14/2006 |
| 6977870 | Optical head having light reflection prevention film, and optical information processing apparatus incorporating the same An optical head has objective lenses that converge a light beam, a light-emitting surface that faces an optical recording medium with an air layer therebetween and from which the light beam converged by the objective lenses exits towards the optical recording medium... | 12/20/2005 |
| 6938890 | Objective lens for high-density optical focusing and an optical disk in an optical pickup An optical pickup includes a light source emitting a laser beam and an optical path changing unit altering a traveling path of an incident beam. An objective lens, disposed on an optical path between the optical path changing unit and an optical disk, focuses the in... | 09/06/2005 |
| 6930973 | Optical element An optical element (16) introduces a first wavefront deviation when a first radiation beam having a first wavelength passes through it and a second wavefront deviation when a second radiation beam having a second wavelength different from the first wavelength... | 08/16/2005 |
| 6922376 | Sil magneto-optic transducer having thin film magnetic coil and holded magnetic core An optical device is provided which has a light converging unit for converging the light illuminated on a magneto-optical recording layer of an optical recording medium and a magnetic field generating unit provided on the light converging unit towards the optical re... | 07/26/2005 |
| 6920098 | Optical pick-up device having lens for first-order light beam convergence Disclosed is a lens for light collection for total reflection for a front monitor photodiode (PD) in an optical pick-up device. The optical pick-up device includes a light source provided with a holographic unit adapted to diffract a light beam, an optical disc arra... | 07/19/2005 |
| 6842296 | Optical lens and method of producing the same, method of producing optical lens array, focus error signal production method, and optical pickup apparatus An optical lens whose focal length is different on first and second planes perpendicular to each other is provided. The optical lens is configured such that a convex element, which is formed integrally with a substrate having a flat face, has a convex curved face th... | 01/11/2005 |
| 6839315 | Optical head and optical pickup having improved thermal coefficient matching for thermal expansion adjustment An optical head, able to reduce thermal stress generated in an optical lens mounted on a bobbin, having a bobbin formed with a center hole and an optical lens mounted on the bobbin via a thermal expansion adjustment member 40 formed with an opening. The optic... | 01/04/2005 |
| 6831790 | Optical element, method for producing the same, and optical pickup An optical element having a substrate formed by an optical material and able to improve mechanical strength, wherein the substrate has a convex part functioning as a convex lens, a flat part positioned around the convex part, and an outer circumference part position... | 12/14/2004 |
| 6801492 | Solid immersion mirror type objective lens and optical pickup device adopting the same A solid immersion mirror (SIM) type objective lens and an optical pickup employing the same. The objective lens has a first curved surface which condenses incident light and a second curved surface surrounding the first curved surface which diverges incident light. ... | 10/05/2004 |
| 6687209 | Optical pickup apparatus, objective lens, apparatus for reproducing and/or recording optical information recording medium An optical pickup apparatus for at least two kinds of optical information recording media, comprises a first light source; a second light source; an optical converging system; and a photo detector. An optical element of the optical converging system compr... | 02/03/2004 |
| 6545969 | Monolithic optical head A monolithic optical head facilitates reading and writing optical data on an optical recording medium. The optical head includes a monolithic substrate formed of an optically transparent material. The substrate has a first side and a second flat side oppo... | 04/08/2003 |
| 6404722 | Method of increasing recording density and capacity of a compact disc A method of increasing recording density and capacity of a compact disc. The compact disc has a transparent substrate and a data-recording region on the transparent substrate. To perform data access, a laser light beam emitting from a light source transmi... | 06/11/2002 |
| 6377535 | High numerical aperture optical focusing device having a conical incident facet and a parabolic reflector for use in data storage systems An optical focusing device for focusing an incident optical beam onto a focal plane, as a focal spot. The optical focusing device includes an incident central refractive facet upon which an optical beam impinges, and a high-index glass body through which ... | 04/23/2002 |
| 6349083 | Near field type optical disk recording reproducing apparatus, optical information recording medium recording reproducing apparatus, pickup apparatus, objective lens In a near field type optical disk recording and/or reproducing apparatus, provided with a light source; an objective single lens to converse light from the light source to a focusing point; an optical disk; and a rotating device to rotate the optical disk... | 02/19/2002 |
| 6337841 | Compatible optical pickup A compatible optical pickup capable of recording or reproducing information on or from compact disc (CD) family media such as CD rewritable (CD-RW) and digital versatile disc (DVD) by adopting a stepped planar lens having a plurality of gratings. The comp... | 01/08/2002 |
| 6310840 | Optical scanning device comprising a main lens and an auxiliary lens An optical player includes an optical scanning device. The scanning device includes an optical lens system for focusing a light beam into a scanning spot on a track of an information carrier. The scanning device includes a first actuator for displacing th... | 10/30/2001 |
| 6249502 | Optical recording head An optical recording head which decomposes light emitted from a light source into three primary colors with rotation of a color wheel, emits the light linearly through an optical fiber array, illuminates an optical valve array through an integrator and an... | 06/19/2001 |
| 6091694 | Solid immersion lens with semiconductor material to achieve high refractive index An immersion system for a magneto-optical storage device has a spherical-segment-shaped lens. The lens is formed of material that is transparent to the electromagnetic radiation of the wavelength λ at which the device is operated, and preferably of a sem... | 07/18/2000 |
| 5757758 | Optical pickup apparatus objective lens and converging optical system for optical pickup and optical disk apparatus An optical pickup apparatus includes: a laser light source; a light converging optical system for converging a light beam emitted from the laser light source onto a first information recording surface of a first optical information recording medium having... | 05/26/1998 |
| 5754512 | Correction elements to lower light intensity around an optical axis of an optical head with a plurality of focal points An optical head apparatus which records or reproduces signals stably on optical disks having different thicknesses. A correction hologram element or a correction filter is provided between a light source and a 2-focus lens in order to decrease optical int... | 05/19/1998 |
| 5555232 | Optical head with built-in semiconductor laser, objective lens and 1/4 wavelength plate An optical head has a semiconductor laser for emitting light, a collimator lens for converting the light from the laser into a parallel light beam, a semiconductor substrate for reflecting the light beam, and an objective lens for focussing the light beam... | 09/10/1996 |
| 5450237 | Hyperresolution optical system A hyper-resolution optical device which can focus a beam of light to a diameter less than the diffraction limit. The optical device has an optical system disposed on a transmissive substrate. One component in the optical system is a hyper-resolution optic... | 09/12/1995 |
| 5161148 | Optical pick-up using wavelength guide with grating coupler therein An optical pick-up for an optical disk has a semiconductor laser having an optical axis for generating a laser beam. An objective lens focuses the laser beam onto an optical disk disposed in the path of the optical axis of the semiconductor laser. A wavel... | 11/03/1992 |
