| Patent application number | Description | Published |
|---|
| 20080259777 | Optical Pickup Device and Optical Disc Device - An optical pickup device | 10-23-2008 |
| 20090016196 | OPTICAL DISC DEVICE AND METHOD FOR CONTROLLING OPTICAL DISC DEVICE - An optical disk device of the present application includes: a turntable | 01-15-2009 |
| 20090040909 | Optical head device and optical information device - An optical head device is provided with a light source | 02-12-2009 |
| 20090046564 | OPTICAL HEAD AND OPTICAL DISC DEVICE - In an optical head ( | 02-19-2009 |
| 20090072818 | Position sensor, optical head device, head moving mechanism, information recordng/reproducing device and position control system - As imaging devices are miniaturized, and optical devices are miniaturized, lens moving mechanisms are also miniaturized. Thus, position sensors for them are required to be miniaturized and have high accuracy at low cost. A magnet | 03-19-2009 |
| 20090135683 | DRIVE MECHANISM AND OPTICAL HEAD - A drive mechanism according to the present invention includes: a drive body that defines a longitudinal direction; a mover that makes a friction fit with the drive body so as to slide in the longitudinal direction; a base member that supports the drive body so as to allow the drive body to move in the longitudinal direction; a drive element, which is secured to one end of the drive body to vibrate the drive body in the longitudinal direction; and a viscoelastic body, which is arranged between the drive body and the base member in a direction perpendicular to the longitudinal direction. | 05-28-2009 |
| 20090135687 | OPTICAL HEAD, CONTROL METHOD FOR OPTICAL HEAD, AND OPTICAL INFORMATION PROCESSING APPARATUS - An optical head includes a hologram which extracts, from a luminous flux of reflected light from an optical disk, at least a first luminous flux branch which does not include the optical axis of the luminous flux; and a photodetector which receives the reflected light from the optical disk and produces signal output, wherein the photodetector has light-receiving areas which receive the first luminous flux branch of reflected light from an optical information recording medium layer targeted for recording or playback out of the plurality of optical information recording medium layers of the optical disk, the light-receiving areas are placed in such a way that the signal output resulting from a light spot formed by the first luminous flux branch of the reflected light from the optical information recording medium layer targeted for recording or playback is practically the same between the first and second photodetection areas, and a boundary line of the light-receiving areas is located in such a position as not to include light spots formed by luminous fluxes of reflected light from the optical information recording medium layers other than the optical information recording medium layer targeted for recording or playback. | 05-28-2009 |
| 20090161499 | NEAR-FIELD OPTICAL HEAD, NEAR-FIELD OPTICAL HEAD DEVICE, NEAR-FIELD OPTICAL INFORMATION DEVICE AND NEAR-FIELD OPTICAL INFORMATION SYSTEM - A conventional near-field optical head cannot be miniaturized because a scattering body generating a near field and an optical head exist individually. A near-field optical head capable of being significantly miniaturized is constituted by a near-field optical probe slider formed by holding, on a slider, a semiconductor laser, a heat dissipation member, a prism for guiding light from the semiconductor laser to a scattering body and a photodetector element. | 06-25-2009 |
| 20090201789 | OPTICAL HEAD DEVICE FOR FORMING LIGHT SPOT ON DISC-SHAPED INFORMATION MEDIUM - An optical head device has at least one upward-reflecting mirror, objective lenses, an objective lens actuator, and a moving mechanism. The upward-reflecting mirror receives an incident luminous flux having a wavelength emitted from a semiconductor, and changes its direction. The objective lenses having mutually different numerical apertures condenses the luminous flux whose direction has been changed by the upward-reflecting mirror to radiate a condensed luminous flux onto an information recording medium. The objective lens actuator moves the objective lenses in the focus direction of the information recording medium so that the luminous flux incident on the information recording medium becomes in a focused state. The moving mechanism moves the upward-reflecting mirror so that the luminous flux is incident on the information recording medium via any one of the objective lenses. | 08-13-2009 |
| 20090257340 | OPTICAL HEAD - To provide an optical head to produce good servo and read signals by reducing the influence of interference by light reflected from a non-read layer of a multilayer optical disc. | 10-15-2009 |
| 20090262630 | OPTICAL CONTROL DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE, OPTICAL INFORMATION RECORDING MEDIUM AND OPTICAL HEAD CONTROL METHOD - An optical controller includes a light source for emitting light, an object lens for condensing light emitted from the light source, a light detection unit for receiving light reflected on an optical information recording medium and outputting a signal corresponding to the amount of the light, and a laser control unit for controlling the amount of the light emitted from the light source to the information recording surface on which information is to be recorded or reproduced, based on the recording state of an information recording surface disposed closer to the object lens than an information recording surface on which the information is to be recorded or reproduced. | 10-22-2009 |
| 20090268588 | OPTICAL HEAD, OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE, AND OPTICAL INFORMATION SYSTEM DEVICE - An object of the invention is to provide an optical element for use in an optical information recording and reproducing device or a like device for recording or reproducing information with respect to an information recording medium using laser light, wherein the optical element is a resin optical element capable of suppressing lowering in transmittance due to deterioration by irradiation of light having a high energy density, and maintaining a high transmittance for a long time. To realize the above object, used is an optical element made of a silicon resin cured material obtained by subjecting a silicon resin composition containing a silsesquioxane compound to a curing treatment. | 10-29-2009 |
| 20090279399 | OPTICAL HEAD AND OPTICAL DISC DEVICE - A tilt can be detected highly accurately by minimizing the tilt detection error. An optical head includes: an objective lens for converging a light beam from a light source onto an optical disc; a photodetector section receiving the beam, reflected from the disc, at divided areas on its photodetection plane and outputting light detection signals from those areas; and a tilt detecting section for detecting a relative tilt between the lens and disc based on the detection signals. The tilt detecting section generates a first push-pull signal PP | 11-12-2009 |
| 20090303864 | OPTICAL RECORDING MEDIUM AND REPRODUCING DEVICE - An optical recording medium is provided with a plurality of recording layers, wherein the recording layers are formed such that all the spacings between two recording layers in all the combinations selected from the plurality of recording layers do not coincide with each other. Accordingly, the return of lights reflected by other layers to an optical head along the same optical path as reflected light from a readout layer during the reproduction can be avoided. Therefore, an optical recording medium, from which a good reproduction signal can be obtained, can be provided by suppressing the deterioration of a servo signal and a reproduction signal of a reproducing device due to a variation of interference fringes on a light receiving element. | 12-10-2009 |
| 20100002560 | COUPLING LENS, OPTICAL HEAD AND OPTICAL DISC DEVICE - Provides a coupling lens which, when used in combination with an objective lens for a plurality of types of optical discs such as a high density disc, DVD, CD or the like, is capable of compensating for various types of aberrations including those caused by wavelength changes and thus providing good recording or reproduction characteristics with a good wavelength dispersion compensation ability; and an optical head and an optical disc apparatus (drive). | 01-07-2010 |
| 20100137506 | PROCESS FOR PRODUCING MULTI-LAYERED INFORMATION RECORDING MEDIUM, SIGNAL TRANSFER SUBSTRATE, AND PROCESS FOR PRODUCING THE SIGNAL TRANSFER SUBSTRATE - In a process for producing a multilayered information recording medium of the present invention, a process for forming a second signal substrate ( | 06-03-2010 |
| 20100182890 | OPTICAL DISK RECORDING/REPRODUCING DEVICE AND OPTICAL HEAD - An optical disk recording/reproducing device includes a turntable | 07-22-2010 |
| 20100214891 | OPTICAL PICKUP DEVICE, OPTICAL DISC DEVICE, COMPUTER, OPTICAL DISC PLAYER, AND OPTICAL DISC RECORDER - A first light source | 08-26-2010 |
| 20100220578 | OBJECTIVE LENS, OPTICAL HEAD AND OPTICAL DISC DEVICE - Provides an objective lens, an optical head and an optical disc apparatus (drive) capable of compensating for various types of aberrations including wavelength changes for a plurality of types of optical discs including high density optical discs, DVDs and CDs with a good wavelength dispersion compensation ability and thus capable of providing good recording or reproduction characteristics. | 09-02-2010 |
| 20100254236 | OPTICAL HEAD DEVICE, AND RECORDING AND/OR REPRODUCING DEVICE - An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens | 10-07-2010 |
