Patent application number | Description | Published |
20090135508 | Lens Driving Device, Optical Pick Up Device and Adjusting Method - A lens driving device according to the present invention includes a mounting base; a collimation lens that is engaged with the mounting base and movable in optical axis directions; and a driving source that moves the collimation lens in the optical axis directions, and the mounting base includes a fulcrum section with which, when the driving device is mounted on a base, a pitch angle and a roll angle of the driving device are adjusted with respect to the base and the optical axis. | 05-28-2009 |
20100110866 | OPTICAL DISC REPRODUCING LIGHT QUANTITY SETTING METHOD AND OPTICAL DISC APPARATUS - In a method of setting a quantity of light directed onto an optical disc for reproduction purposes, an area of the optical disc in which information has been recorded is reproduced with a test-reproducing light quantity (S | 05-06-2010 |
20100162282 | Optical-system driving device - An optical-system driving device is achieved that can switch over between objective lenses and is space-saving, lightweight, and simply-configured. | 06-24-2010 |
20100284260 | OBJECTIVE LENS DRIVING DEVICE AND OPTICAL PICKUP DEVICE - An objective lens driving device includes a lens holder ( | 11-11-2010 |
20110211429 | OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE - An optical pickup device includes a plurality of laser light sources emitting laser beams of different oscillation wavelengths, and a plurality of objective lenses on which the laser beams in the form of diverging beams emitted by the plurality of laser light sources are incident, and which directly focus the laser beams onto a recording surface of an optical disc. A rising mirror reflects a laser beam in the form of a diverging beam emitted by a laser light source of a predetermined oscillation wavelength among the plurality of laser light sources so as to lead the laser beam to one of the plurality of objective lenses, and transmits the laser beam in the form of a diverging beam emitted by the other laser light source. As the rising mirror transmits the laser beam in the form of the diverging beam emitted by said other laser light source, astigmatism is generated so as to correct existing astigmatism of the laser beam emitted by said other laser light source. | 09-01-2011 |
20110271291 | OPTICAL DISC DISCRIMINATION METHOD, OPTICAL DISC TRANSPORT DEVICE, OPTICAL DISC DEVICE, OPTICAL DISC INSPECTION DEVICE, AND OPTICAL PICKUP INSPECTION DEVICE - An optical disc device compatible with optical discs of different types having different track pitches, having a light detecting means ( | 11-03-2011 |
20130044576 | OPTICAL RECORDING/REPRODUCTION METHOD AND OPTICAL RECORDING/REPRODUCTION DEVICE - An optical recording/reproduction method and device that can perform control for optimizing the amount of spherical aberration in a multilayered optical disc in a short period of time. When the objective lens is displaced in the focusing direction, the amplitude value of the focusing error signal detected just after leaving the focal position of a given first recording layer and the amplitude value of the focusing error signal detected just before passing through the focal position of a given second recording layer other than the first recording layer are measured with a particular spherical aberration, the amplitude ratio of amplitude values is calculated, the difference between spherical aberration and the optimal spherical aberration for the second recording layer is approximated as a function of the amplitude ratio, the optimal spherical aberration is calculated on the basis of this approximation, and the spherical aberration is set. | 02-21-2013 |
20130279319 | OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE - An optical pickup device moves in a feed direction parallel to a radial direction of an optical disc rotating on an axis of rotation, and records or reproduces information on an information recording surface of the optical disc. The optical pickup device has a first light source that emits light of a first wavelength, a second light source that emits light of a second wavelength differing from the first wavelength, a first objective lens for focusing the light from the first light source onto the information recording surface, and a second objective lens for focusing the light from the second light source onto the information recording surface. The first and second objective lenses and the first light source are disposed in a plane that passes through the axis of rotation and is parallel to the feed direction. | 10-24-2013 |
20130286810 | OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE - An optical pickup device includes a laser light source | 10-31-2013 |
20140313874 | OPTICAL HEAD DEVICE AND OPTICAL DISC DEVICE - An optical component, a hologram, and a photodetector are configured in an optical head device of an optical disc device such that a +1-order beam or a −1-order beam of diffracted light generated from light reflected from an information track in the intended information recording layer strikes the interior of the light-receiving surfaces of the tracking error detection light-receiving sections, a +1-order beam or a −1-order beam of diffracted light generated from light reflected from an information track in an information recording layer one layer deeper than the intended information recording layer strikes outside the light-receiving sections, and a +1-order beam or a −1-order beam of diffracted light that is generated from light reflected from an information track in an information recording layer one layer shallower than the intended information recording layer strikes outside the light-receiving sections. | 10-23-2014 |