Celebrity Inventors
Glam girl Heddy Lamar may have used her good looks to good effect on the silver screen, but she put her smarts to better use as an inventor. During World War II, she co-patented a frequency-switching system for torpedo guidance that was considered years ahead of its time.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7965611 | Optical disk apparatus and starting method thereof In a three-wavelength-compliant optical disk apparatus, the present invention enables to shorten time required for starting the apparatus such as discrimination of an optical disk and adjustment of a beam-expander. At the time of starting the apparatus, the operatio... | 06/21/2011 |
| 7460459 | Optical pickup apparatus, objective optical element and optical information recording and/or reproducing apparatus An optical pickup apparatus comprises: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting a third light flux; and an objective optical element. The objective optical element... | 12/02/2008 |
| 7453786 | Optical pickup apparatus, objective optical element and optical information recording and/or reproducing apparatus An optical pickup apparatus comprises: a first light source; a second light source; a third light source; and an objective optical element. The objective optical element comprises at least two areas comprising first and second optical path difference providing struc... | 11/18/2008 |
| 7369480 | Optical pickup device and optical element An optical pickup device includes a light source emitting a light beam having a wavelength within a range of 390 nm to 420 nm and an optical element to perform recording and/or reproducing of information of an optical disk having a protective substrate thickness d | 05/06/2008 |
| 7333416 | Optical pickup apparatus for recording or reproducing information for an optical information recording medium and objective lens for optical pickup apparatus 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... | 02/19/2008 |
| 7283451 | Objective lens, optical head apparatus, optical information recording/reproducing apparatus An objective lens for converging a light beam emitted from a first light source on a recording surface (17a) of a first optical information recording medium covered with a transparent substrate (7a) and converging a light beam emitted fro... | 10/16/2007 |
| 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 |
| 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 |
| 7072118 | Optical element and manufacturing method of the optical element An optical element having an optical axis, comprises an element body having the maximum first length of 4 mm or less in the optical axis direction and the second maximum length of 6 mm or less in the direction perpendicular to the optical axis direction; wherein the... | 07/04/2006 |
| 7046611 | Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the optical pickup apparatus including two laser light sources to emit light b... | 05/16/2006 |
| 7035186 | Optical pickup for detecting thickness variation of a recording medium, and/or compensating for spherical aberration caused by thickness variation of a recording medium An optical pickup for a recording medium includes a light beam division and detection unit including receiving portions dividing an incident light beam reflected on the recording medium into a first light beam portion and a second light beam portion around the first... | 04/25/2006 |
| 7035193 | Objective lens for optical disc An objective lens for recording data to and/or reproducing data from first and second optical discs. The objective lens is provided with at least one surface including a plurality of annular zones divided by steps. The steps has functions of phase shifting a wavefro... | 04/25/2006 |
| 7016291 | Optical recording and pickup head for digital versatile disc compatible with read-writable compact disc by adopting flat plate lens having staircase type diffraction grating structure An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively s... | 03/21/2006 |
| 6995929 | Objective lens for scanning optical disks (DVDS) An objective lens for scanning DVD and HD-DVD optical disks, comprising a first part and a second part, wherein said first part is shaped to comprise a first surface and an opposing second surface, said second part is shaped to comprise a third surface and an opposi... | 02/07/2006 |
| 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 |
| 6882614 | Recording/reproducing apparatus having an optical pickup device to read from and record information to disks of different thicknesses A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration. The recording and/or reproducing apparatus includes an optical pickup having an objective lens, disposed opposite a disk, having a l... | 04/19/2005 |
| 6816449 | Optical pickup compatible with a digital versatile disk and a recordable compact disk using a holographic ring lens An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the optical pickup apparatus including two laser light sources to emit light b... | 11/09/2004 |
| 6781943 | Objective lens and optical pick-up device for reproducing and/or recording of information In an optical pickup device for conducting reproducing and/or recording of information in at least two kinds of optical information recording media, an optical element divides a light flux into k(k≧4) pieces of ring-shaped light flux. When reproducing or recording... | 08/24/2004 |
| 6687037 | Optical scanning device An optical device scans record carriers with radiation of two wavelengths. The device has an objective lens with a diffractive part with a pattern of elements of stepped profile. The total of the step heights are substantially equal to multiples of height... | 02/03/2004 |
| 6590851 | Optical pickup for recording/reproducing optical discs of multiple thicknesses An optical pickup including: first and second light sources for generating first and second laser beams having different wavelengths corresponding to first and second media having different thicknesses, respectively; an objective lens that has diverging a... | 07/08/2003 |
| 5930220 | Tracking method for optical disk apparatus using diffraction light In an optical head, light from a semiconductor laser is directed through a condensing optical system with a condensing lens onto an optical information recording medium through a transparent substrate in the form of a light spot. A unit for producing a li... | 07/27/1999 |
| 5841754 | Optical pickup device having an objective lens and auxiliary lenses exterior thereof An optical pickup device which can obtain a stable reproduction signal by an increased numerical aperture of an objective lens. The optical pickup device includes an objective lens unit having an objective lens facing a disc and having a predetermined eff... | 11/24/1998 |
| 5777971 | Optical head with a micro fresnel lens integrated on a beam splitter Disclosed is an optical pickup having simplified constitution. A light source for radiating laser beam for reading an optical disc is comprised. A beam splitter for separating the laser beam radiated from the light source into transmitting light and refle... | 07/07/1998 |
| 5724335 | Objective lens for recording and reproducing for use in an optical information recording medium An optical system includes a laser light source; an objective lens for converging luminous flux emitted from the laser light source onto an information recording surface of an optical information recording medium through a transparent substrate of the opt... | 03/03/1998 |
| 5644413 | Optical head for adjusting a positional relation between the information medium and the optical head An optical head apparatus consists of a semiconductor laser for radiating a light beam, a first collimator lens for collimating the light beam, a wedge-like prism for reshaping the light beam, a beam splitter for transmitting the light beam in an outgoing... | 07/01/1997 |
| 5526338 | Method and apparatus for storage and retrieval with multilayer optical disks A multilayer optical disk system, which includes an optical disk unit having a number of connected optical disks. A number of light sources, such as diode lasers, are used to provide a number of light beams of different wavelengths. A wavelength multiplex... | 06/11/1996 |
| 5453961 | Pick-up device for optical disk readout using waveguide gratings An optical device for detecting focus error, tracking error and recorded data in an optical head system has a grating plate having a plurality of gratings and waveguides. The gratings are fabricated by holographic exposure of a resist layer spin-coated on... | 09/26/1995 |
| 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 |
| 5111448 | Optical pickup head having a hologram-associated objective lens and optical information processing apparatus using the same An optical pickup head for performing recording, reproducing and erasing of information on an optical disc in an optical system employs an objective lens, which is integrated or combined with a holographic optical element, so that the focusing of a diffra... | 05/05/1992 |
| 4876680 | Monolithic optical pick-up using an optical waveguide An optical pick-up for use in an optically information recording and reproducing apparatus is provided. The pick-up includes a substrate on which an optical waveguide layer is formed and a grating coupler is formed on the optical waveguide layer. Photosen... | 10/24/1989 |
| 4733065 | Optical head device with diffraction grating for separating a light beam incident on an optical recording medium from a light beam reflected therefrom An optical head device comprises a light source, condensing optics for condensing a light beam emitted from the light source on an optical recording medium, a photodetector for detecting the light of the light beam reflected from the recording medium, and... | 03/22/1988 |
| 4628367 | Method and device for reading digital data in an optical mass memory system using electrophotography An electrostatic image of binary data representing elements if formed on a particular electrophotographic member disclosed and claimed in U.S. Pat. No. 4,025,339. The electrostatic image is toned and the toned image is transferred to a storage medium. The... | 12/09/1986 |
