Patent application number | Description | Published |
20090040909 | Optical head device and optical information device - An optical head device is provided with a light source | 02-12-2009 |
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 |
20100182890 | OPTICAL DISK RECORDING/REPRODUCING DEVICE AND OPTICAL HEAD - An optical disk recording/reproducing device includes a turntable | 07-22-2010 |
20100232265 | DRIVE DEVICE, OPTICAL HEAD, AND OPTICAL DISK RECORDING/REPRODUCING DEVICE - A spherical aberration correction mechanism | 09-16-2010 |
20110019524 | OPTICAL HEAD AND OPTICAL INFORMATION DEVICE - An optical head comprises: a light source that emits a light beam; an objective lens that condenses, in the form of converging light, the light beam emitted by the light source, onto an information recording medium; a cylindrical lens onto which a reflected light beam that is reflected by the information recording medium is incident, and which generates astigmatism for forming a focus error signal; a light detector that receives the reflected light beam passing through the cylindrical lens; and a holder that holds the cylindrical lens and the light detector. The holder has a first main face and a second main face that extend in directions that intersect the optical axis of the reflected light beam. The cylindrical lens is bonded to the first main face and the light detector is bonded to the second main face. | 01-27-2011 |
20120147726 | OPTICAL HEAD AND OPTICAL INFORMATION DEVICE - Provided are an optical head and an optical information device capable of inhibiting the temperature rise of a photodetector. An optical head ( | 06-14-2012 |
20120151508 | OPTICAL HEAD DEVICE, OPTICAL INFORMATION DEVICE, AND INFORMATION PROCESSING DEVICE - When information is recorded or reproduced on or from an optical information medium having three or more recording layers using blue light, interference by another layer light is reduced and, when information is reproduced from an optical information medium using red light, an S/N ratio is held excellently high. | 06-14-2012 |
20130010584 | OPTICAL HEAD AND OPTICAL INFORMATION DEVICE - There are provided an optical head and an optical information device capable of downsizing the optical head, and capable of improving the qualities of a focus error signal, a tracking error signal, and a reproduction signal. A light detector ( | 01-10-2013 |
20130152110 | OPTICAL DRIVE SYSTEM, CARTRIDGE AND DRIVE DEVICE WHICH ARE USED IN OPTICAL DRIVE SYSTEM, AND CLEANING METHOD FOR OPTICAL DRIVE SYSTEM - The present application discloses an optical drive system, including: a cartridge with a wall portion which defines a storage room to store a rotatable record medium with a light receiving surface scanned by light; and a drive device with a rotary driver, which rotates the record medium, an optical element, which irradiates the light, and a movement driver, which moves the optical element between inner and outer positions. The wall portion is provided with an outlet at the outer position. Air in the storage room is exhausted from the outlet by air flow resulting from rotation of the record medium. The outlet is divided into first and second opening regions by a movement track of the optical element. The first opening region is larger than the second opening region at an upstream position of the first opening region in a rotational direction of the record medium. | 06-13-2013 |
20140380342 | OPTICAL DISC APPARATUS, SHEET MEMBER, AND METHOD FOR CLEANING OBJECTIVE LENS - The present application discloses optical disc apparatus including: drive mechanism for rotating medium including processing surface to be subjected optical information process; housing for storing drive mechanism; tray mechanism for displacing medium between storage position, at which medium is stored in housing, and ejection position, at which medium is ejected from housing; at least one objective lens for condensing light onto processing surface of medium situated at storage position to perform information process; and first displacement mechanism for displacing at least one objective lens along processing surface between first position and second position which is more distant from rotational center of medium rotated by the drive mechanism than first position is. Tray mechanism defines at least one opening in position closer to second position than first position. | 12-25-2014 |