| Patent Number |
Title Of Patent |
Date Issued |
| RE39025 |
Lens device including a light controlling mechanism and an optical pickup apparatus using a lens |
March 21, 2006 |
| A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in a |
| 7613095 |
Optical pickup apparatus |
November 3, 2009 |
| An optical pickup apparatus according to an embodiment of the present invention, comprises an optical unit for projecting a plurality of wavelengths of light, the light including a celadon light, toward a recording medium and receiving the light reflected from the recording medium to |
| 7606135 |
Optical recording/reproducing apparatus capable of recording/reproducing information onto/from v |
October 20, 2009 |
| An optical recording/reproducing apparatus including a plurality of light sources emitting lights with different wavelengths for use in recording/reproducing information onto/from various types of optical recording media of different recording densities, in which at least two lights |
| 7593306 |
Diffraction element and optical pick-up apparatus having the same |
September 22, 2009 |
| A diffraction element for an optical pick-up apparatus is provided that enables more accurate focusing control. The diffraction element for an optical pick-up apparatus is divided into first and second regions, each being formed with a grid pattern in which grids are repeated with a |
| 7590034 |
Method for detecting servo error, apparatus therefor, disk which maintains quality of servo erro |
September 15, 2009 |
| An apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, includes a reproducing signal generator for generating a reproducing signal including sum signals V1 and V2 of radial pairs, a sum signal RF_sum, and a push-pull s |
| 7558179 |
Compatible optical pickup using light sources following a common optical path |
July 7, 2009 |
| An optical pickup compatible with recording media having different formats, the optical pickup includes a light device module having a first light beam source and a second light beam source to emit corresponding first and second light beams having different wavelengths, a hologram li |
| 7529039 |
Object lens device with high numerical aperture and optical pickup device adopting the same |
May 5, 2009 |
| An object lens arranged on a light proceeding path to focus light on a recording medium includes a first surface that is an incident surface on which light is incident, a second surface from which light exits to be focused on the recording medium, and a diffractive optical element di |
| 7435934 |
Optical pickup apparatus which is compatible with multiple types of media |
October 14, 2008 |
| 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 wavelength light |
| 7319643 |
Method for detecting servo error, apparatus therefor, disk which maintains quality of servo erro |
January 15, 2008 |
| An apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, includes a reproducing signal generator for generating a reproducing signal including sum signals V1 and V2 of radial pairs, a sum signal RF_sum, and a push-pull s |
| 7200098 |
Objective lens for high-density optical focusing and an optical disk in an optical pickup |
April 3, 2007 |
| 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 incident beam from the |
| 7167424 |
METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERRO |
January 23, 2007 |
| A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting |
| 7116627 |
Compatible optical pickup device using a single light source |
October 3, 2006 |
| A compatible optical pickup device includes a single light source to emit a light having a wavelength longer than 650 nm, an objective lens having a near axis area, a ring type annular lens area, and a far axis area to focus the light to form light spots suitable for a first relatively t |
| 7110334 |
Method for detecting servo error, apparatus therefor, disk which maintains quality of servo erro |
September 19, 2006 |
| An apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, includes a reproducing signal generator for generating a reproducing signal including sum signals V1 and V2 of radial pairs, a sum signal RF_sum, and a push-pull s |
| 7072254 |
Optical pickup device and recording medium used therefor |
July 4, 2006 |
| An optical pickup device includes a light unit for irradiating a light beam having a wavelength longer than 650 nm onto a recording medium and receiving and detecting a light beam reflected by the recording medium, and an objective tens formed of a single lens having an NA of 0.7 or more |
| 7072114 |
Optical pickup using an optical phase plate and which is compatible with optical recording media |
July 4, 2006 |
| An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an objective lens having a focal length of an information recording surface in the DVD, an optica |
| 7046611 |
Optical pickup compatible with a digital versatile disk and a recordable compact disk using a ho |
May 16, 2006 |
| 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 beams having the di |
| 7035191 |
Compatible optical pickup using light sources following a common optical path |
April 25, 2006 |
| An optical pickup compatible with recording media having different formats, the optical pickup includes a light device module having a first light beam source and a second light beam source to emit corresponding first and second light beams having different wavelengths, a hologram li |
| 7016291 |
Optical recording and pickup head for digital versatile disc compatible with read-writable compa |
March 21, 2006 |
| 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 short wavelength, a |
| 6985293 |
Optical pickup using an optical phase plate and which is compatible with optical media for diffe |
January 10, 2006 |
| An optical pickup apparatus having laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an objective lens having a focal length of an information recording surface in the DVD, an optica |
| 6938890 |
Objective lens for high-density optical focusing and an optical disk in an optical pickup |
September 6, 2005 |
| 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 incident beam from the |
| 6882614 |
Recording/reproducing apparatus having an optical pickup device to read from and record informat |
April 19, 2005 |
| 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 light passing region |
| 6816449 |
Optical pickup compatible with a digital versatile disk and a recordable compact disk using a ho |
November 9, 2004 |
| 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 beams having the differ |
| 6791933 |
Optical pickup using an optical phase plate |
September 14, 2004 |
| An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light so |
| 6788636 |
Optical pickup compatible with a digital versatile disk and a recordable compact disk using a ho |
September 7, 2004 |
| 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 beams having the differ |
| 6765857 |
Optical recording and pickup head for digital versatile disc compatible with read-writable compa |
July 20, 2004 |
| 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 short wavelength, a |
| 6721243 |
METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERRO |
April 13, 2004 |
| A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting |
| 6657942 |
Optical recording and reproducing apparatus having floating swing arm and optical disk for use t |
December 2, 2003 |
| A swing-arm type optical recording and reproducing apparatus and an optical disk applicable to the same. The optical disk includes a substrate having an information recording surface to record and reproduce an information signal, and a protective layer which is provided on the informatio |
| 6639889 |
Recording/reproducing apparatus including an optical pickup having an objective lens compatible |
October 28, 2003 |
| A recording/reproducing apparatus including an optical pickup compatible with a plurality of optical recording media each using light of a different wavelength. The optical pickup includes at least one light source, an objective lens having a function of focusing light emitted from t |
| 6636464 |
Optical pickup device capable of detecting stable error signal |
October 21, 2003 |
| An optical pickup device employing a signal detection unit including a hologram element having a plurality of pattern regions for diffracting and/or focusing light reflected and incident from a recording medium, a photodetector having a plurality of light receiving regions for receiving |
| 6556521 |
METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERRO |
April 29, 2003 |
| A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting |
| 6556520 |
METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERRO |
April 29, 2003 |
| A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting |
| 6547398 |
Projection-type image display apparatus and method |
April 15, 2003 |
| A projection-type image display apparatus having a structure adapted so that the efficiency of the use of light and resolving power thereof can be enhanced. The projection-type image display apparatus includes a light source; a color separation unit separating incident rays according to |
| 6480222 |
Semiconductor laser and flying optical pickup for recording/reproducing using the same |
November 12, 2002 |
| A semiconductor laser for generating a laser beam and an optical pickup for recording/reproducing information using the semiconductor laser as an optical source are provided. The semiconductor laser includes an aperture member on an emitting end thereof to perform high-density memory |
| 6469979 |
METHOD FOR DETECTING SERVO ERROR, APPARATUS THEREFOR, DISK WHICH MAINTAINS QUALITY OF SERVO ERRO |
October 22, 2002 |
| A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting |
| 6466529 |
Optical pickup assembly and method of detecting tilt |
October 15, 2002 |
| An optical pickup assembly having an elastically supported tilt mechanism. The optical pickup assembly includes a bobbin at which an objective lens is mounted and an elastic support member which supports the bobbin in elastic motion with respect to a holder installed at a base. A focus c |
| 6449237 |
Optical recording and pickup head for digital versatile disc compatible with read-writable compa |
September 10, 2002 |
| 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 short wavelength, a |
| 6449229 |
Optical pickup assembly with adjustable inclination |
September 10, 2002 |
| An optical pickup assembly includes a base, a bobbin having an objective lens mounted thereon, the bobbin being installed at the base so as to be movable and having a pair of first side surfaces parallel to a radial direction of a disk and a pair of second side surfaces parallel to the |
| 6430139 |
Objective lens for high-density optical focusing, and optical pickup using the same |
August 6, 2002 |
| A high-density focusing objective lens having a high numerical aperture (NA), which can be easily manufactured by an existing technique, and an optical pickup using the objective lens for high-density recording. The objective lens includes a first transmitting portion placed at a rel |
| 6400666 |
Optical pickup device |
June 4, 2002 |
| An optical pickup device includes a light source for generating and emitting light, optical path changing means for changing a proceeding path of incident light, an objective lens for focusing incident light on a recording medium which has a recording surface where information is rec |
| 6400658 |
DVD-RAM disk reproduction apparatus for reducing errors during detection of identification data |
June 4, 2002 |
| A DVD-RAM disk reproduction apparatus for reducing an error during detection of ID data, which includes a first operational amplifier for obtaining a sum signal resulting from the addition of four picked-up signals picked up by divided-by-four photodiodes from a DVD-RAM disk having a |
| 6396638 |
Optical pickup device capable of stable tracking |
May 28, 2002 |
| An optical pickup device includes a light source for generating light, a light path changing means for changing the traveling path of incident light, an objective lens for focusing incident light to form a light spot on a recording medium and having an incidence region of a predetermined |
| 6381207 |
Optical pickup movable to control beam shift and field angle in an optical disk drive |
April 30, 2002 |
| An optical pickup of an optical disk drive. The optical pickup includes a laser beam source for generating a laser beam; a pickup base having an objective lens for projecting the laser beam generated from the laser beam source to an information recording surface of an optical disk; a var |
| 6363046 |
Optical recording/pickup head compatible with a digital versatile disk (DVD) and a recordable co |
March 26, 2002 |
| An optical recording/pickup head having compatibility with a recordable compact disk (CD-R) and a digital video disk (DVD) transmits a first light beam having a wavelength of 635 nm for a DVD emitted from a first light source and a second light beam having a wavelength of 780 nm for a CD |
| 6345029 |
Optical pickup apparatus and method |
February 5, 2002 |
| An optical pickup apparatus and method which can selectively perform optical pickup with respect to at least two types of optical disks, on which information recording surfaces are formed, having a different thickness. The optical pickup apparatus includes an optical path alteration |
| 6337841 |
Compatible optical pickup |
January 8, 2002 |
| 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 compatible optical pickup includes a |
| 6304540 |
Optical pickup compatible with a digital versatile disk and a recordable compact disk using a ho |
October 16, 2001 |
| 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 beams having the differ |
| 6285646 |
Optical pickup using objective lens compatible with a plurality of optical disks |
September 4, 2001 |
| An optical pickup device including an objective lens which is compatible with a plurality of optical disks of respectively different specifications, such as a digital versatile disk (DVD), a compact disk-recordable (CD-R) medium, a compact disk (CD) and a laser disk (LD). The optical |
| 6275461 |
Optical pickup using an optical phase plate |
August 14, 2001 |
| A recording/reproducing apparatus includes an optical pickup device having an optical phase plate which is compatible with optical recording mediums having different thicknesses, and an optical signal processing device processes information read from the optical recording mediums and |
| 6272096 |
Optical pickup using an optical phase plate |
August 7, 2001 |
| An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light so |
| 6266315 |
Catadioptric optical system, optical pickup and optical disk drive employing the same, and optic |
July 24, 2001 |
| An optical focusing system which uses a light beam emitted from a light source, includes a refractive surface on one side of the optical focusing system and having a first radius of curvature, a first reflection surface on the above one side, surrounding the refractive surface and having |
