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| Number | Title | Issue Date |
| 8184521 | Optical pickup lens An optical pickup lens for focusing a light beam from a laser light source on an optical information recording medium is a single lens. The optical pickup lens has two surfaces, and a surface R2 opposite to a surface R1 closer to the laser light source... | 05/22/2012 |
| 8179769 | Optical head device, optical information device, computer, disc player, car navigation system, optical disc recorder, and vehicle An optical head device compatible to different types of optical discs and capable of guaranteeing a sufficiently wide dynamic range for a low density optical disc, and the like are provided. The optical head device includes a plurality of light sources switch... | 05/15/2012 |
| 8121013 | Optical pickup apparatus and optical disc apparatus An optical pickup apparatus changes a propagation direction of luminous fluxes, out of a laser light reflected by a disc, in four luminous flux regions set about a laser optical axis so as to mutually disperse these luminous fluxes. A signal light region in which on... | 02/21/2012 |
| 8116189 | Optical pickup lens An optical pickup lens for focusing a light beam from a laser light source on an optical information recording medium is a single lens. The optical pickup lens has two surfaces, and a surface R2 opposite to a surface R1 closer to the laser light source... | 02/14/2012 |
| 8107350 | Optical information recording/reproducing apparatus and objective lens for the same An objective lens including: a first region to respectively converge first and second light beams onto recording surfaces of first and second optical discs; and a second region located outside of the first region and configured to converge the first light beam onto ... | 01/31/2012 |
| 7969854 | Optical pickup device and objective lens used in the same An optical system has an optical functional surface including a common region used for conducting information recording and/or reproducing for both of a first optical information recording medium and a second optical information recording medium. The common region c... | 06/28/2011 |
| 7948857 | Optical pickup apparatus, objective optical element and optical information recording reproducing apparatus An optical pickup apparatus according to the present invention includes: 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 elem... | 05/24/2011 |
| 7920456 | Objective lens for optical pickup device, optical pickup device and optical information recording/reproducing apparatus An objective lens used for an optical pickup device wherein the optical pickup device includes: light source; and a converging optical system including the objective lens for converging a light beam emitted from the light source to an information recording surface o... | 04/05/2011 |
| 7859978 | Optical pickup lens An optical pickup lens for focusing a light beam from a laser light source on an optical information recording medium is a single lens. The optical pickup lens has two surfaces, and a surface R2 opposite to a surface R1 closer to the laser light source... | 12/28/2010 |
| 7843793 | Optical pickup apparatus, objective optical element and optical information recording reproducing apparatus An optical pickup apparatus according to the present invention includes: 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 elem... | 11/30/2010 |
| 7830774 | Optical pickup lens An optical pickup lens for focusing a light beam from a laser light source on an optical information recording medium is a single lens. The optical pickup lens has two surfaces, and a surface R2 opposite to a surface R1 closer to the laser light source... | 11/09/2010 |
| 7787349 | Optical pickup lens and optical pickup apparatus An optical pickup lens focuses laser beams having different wavelengths λ1, λ2 and λ3 on at least three kinds of optical discs. At least one side of the optical pickup lens has a concentric loop zonal structure for compensating wavefront aberration ... | 08/31/2010 |
| 7755998 | Optical pickup system, optical head, optical disk apparatus, and objective lens An optical pickup system for reading information of three kinds of optical recording media. The optical pickup system has a wavelength selective filter that includes an outer area for shielding one light beam of light beams having three kinds of wavelengths and an i... | 07/13/2010 |
| 7483358 | Objective lens, optical element, optical pick-up apparatus and optical information recording and/or reproducing apparatus equipped therewith A hybrid objective lens has a refractive lens and a diffractive optical element constructed by plural coaxial ring-shaped zones on at least one optical surface thereof. When n1, n2 and n3 each is a diffraction order of a diffracted ray having a maximum light amount ... | 01/27/2009 |
| 7463571 | Optical element, optical pickup, and optical information recording/reproducing apparatus The hologram (20) for spherical aberration correction is formed in optical element (10). With respect to the first laser light which requires the largest effective diameter, the hologram does not have effect on wavefront. With respect to the second las... | 12/09/2008 |
| 7433290 | Complex objective lens, optical head, optical information apparatus, computer, optical disk player, car navigation system, optical disk recorder, and optical disk server A complex objective lens composed of a hologram and an objective lens, capable of realizing stable and high-precision compatible reproducing/recording of a BD with a base thickness of about 0.1 mm for a blue light beam (wavelength λ1) and a DVD with a base t... | 10/07/2008 |
| 7408866 | Objective lens for optical pickup apparatus, optical pickup apparatus and optical information recording reproducing apparatus An objective lens, comprises a first diffractive structure having plural concentric ring-shaped zones. A n1-th order diffracted ray is converged on an information recording surface of first optical information recording medium through first protective substra... | 08/05/2008 |
| RE40329 | Single objective lens for use with CD or DVD optical disks An optical disk reader or read/write system for CD or DVD formats. First and second laser diodes operating at different wavelengths have their output beams collimated and directed at a single element objective lens, and are then reflected off the disk back through t... | 05/20/2008 |
| 7372794 | Compatible optical pickup applying tilt to objective lens in proportion to radial movement of objective lens A compatible optical pickup compatibly using a high density recording medium and at least one low density recording medium, includes an objective lens to form a light spot suitable for use on a recording surface of the high density recording medium by focusing a cor... | 05/13/2008 |
| 7369478 | Optical information recording apparatus, optical information reproducing apparatus, and optical information recording/reproducing apparatus An object is to lighten a pickup and reduce the size of a driving device and, as a result, to reduce the size of an optical information recording apparatus, an optical information reproducing apparatus and an optical information recording/reproducing apparatus, and ... | 05/06/2008 |
| 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 |
| 7359294 | Optical scanning device with tilt detection This invention relates to an optical scanning device for scanning an optical record carrier and detecting a tilt characteristic of the optical record carrier during scanning. The device includes a redirecting structure (26) arranged on an objective lens (1... | 04/15/2008 |
| 7342865 | Objective lens for optical recording/reproducing device There is provided an objective lens which has positive refractive power and has a single lens element having an incident surface from which the collimated beam enters and an exit surface from which the collimated beam emerges. Further, the incident surface and the e... | 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 |
| 7319646 | Focus operation for an optical disk device A disk device in which at the recovery job of a focus pull-in operation, a CPU supplies servo control means with the respective correction values of the rotational speed of an optical disk and the moving speed of a lens which are described in the data table of a RAM... | 01/15/2008 |
| 7315503 | Optical pick-up device using micromirror array lens An optical pick-up device comprising at least one micromirror array lens. The micromirror array lens enables focusing, tracking, and/or tilt compensation in the optical pick-up device without macroscopic motions. The micromirror array lens provides the device with a... | 01/01/2008 |
| 7315504 | Optical pickup apparatus and manufacturing method thereof A front monitor-type optical pickup apparatus is composed of a window 10w for taking in a laser light beam, and a housing 10 for housing a front monitor detector 9 so as to face the window 10w. In the housing 10, the ... | 01/01/2008 |
| 7305689 | Optical recording medium and disc cartridge An optical recording medium is provided which has a substrate and a signal recording layer provided on the substrate and in which an information signal is recorded in the form of microscopic pits. A light beam is focused on the signal recording layer and some change... | 12/04/2007 |
| 7292517 | Optical scanning device for use with multiple types of record carrier surfaces An optical scanning device for scanning of a first, second and third type of optical record carrier with radiation of a first wavelength λ1, a second wavelength λ2 and a third wavelength λ3, respectively, where the three wavelengt... | 11/06/2007 |
| 7283452 | Objective lens having two aspheric surfaces and a phase shifter and optical device including the same An objective lens in which a first wavelength is used in reading a first optical disk, a second wavelength is used in recording or reading a second optical disk, and a phase shifter provided with annular step portions having a center coincident with an optical axis ... | 10/16/2007 |
| 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 |
| 7274646 | Object lens for an infinite-type optical pickup, optical pickup and optical information processing device As an object lens for an optical pickup, applied is a single-lens and both-side-convex configuration is applied. Further, specific conditional formulas are created with respect to a particular numerical aperture NA, for a paraxial curvature radius R1 on the surface ... | 09/25/2007 |
| 7272083 | Optical head device and method for correcting spherical aberration On an optical disk in a recording and/or playback apparatus, the position at which the thickness error of a light transmission layer is in the optical axis of an objective lens 11, and the position at which the recording/playback of information is performed i... | 09/18/2007 |
| 7260048 | Object lens for optical pickup and method for designing the same An optical pickup records data in or reproduces data from optical recording media respectively having recording faces at different heights, and includes a semiconductor laser diode array having light emitting portions for respectively emitting laser beams of differe... | 08/21/2007 |
| 7260032 | Focal point adjusting method, and optical pickup device A focus control process (S2), a spherical aberration correcting process (S4), and a focus offset adjusting process (S7 to S9) are performed in this order. In the focus control process, an output of a focus error signal obtained by detecti... | 08/21/2007 |
| 7254107 | Optical head and optical recording and reproducing apparatus An optical head is provided with: an objective-lens-use opening that determines an aperture of the objective lens; a light-source light-quantity controlling opening that aperture-controls light that has been separated by the light separation device; a light detector... | 08/07/2007 |
| 7239594 | Self-referenced holography using element formed on a holographic medium The invention is directed to self-referenced holographic recording techniques that make use of an element of a holographic medium to create a reference beam from a zero frequency Fourier component of a data encoded object beam. In other words, the self-referencing e... | 07/03/2007 |
| 7239598 | Objective lens for optical pick-up There is provided an objective lens for an optical pick-up which is used to record/reproduce data to/from at least three types of optical discs. Thicknesses t1, t2 and t3 of cover layers of first, second third optical discs are t1≅0.6 m... | 07/03/2007 |
| 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 |
| 7227702 | Bi-convex solid immersion lens A bi-convex solid immersion lens is disclosed, having a top and bottom convex surfaces. The radius of curvature of the bottom surface is larger than that of the top surface. A conical sloped side-wall connects the top and bottom surface. ... | 06/05/2007 |
