Patent application number | Description | Published |
20090022039 | Optical Pickup and Objective Optical System for Use in the Same - An optical pickup ( | 01-22-2009 |
20090185473 | OBJECTIVE LENS AND OPTICAL PICKUP DEVICE - In order that thickness reduction, weight reduction, and mass productivity improvement should be achieved in an objective lens even in the case where NA is high, an objective lens according to the present invention is a bi-convex single lens having at least one aspheric surface, and satisfies conditions: (1) 3.507-23-2009 | |
20090245075 | 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. | 10-01-2009 |
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 |
20100172027 | OPTICAL MEMBER - The present invention relates to an optical element and, more particularly relates to an optical element having at least one surface in which an antireflection concave-convex structure is formed. | 07-08-2010 |
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 |
20100254248 | OPTICAL PICKUP OPTICAL SYSTEM AND OPTICAL PICKUP DEVICE HAVING THE SAME - An optical system for optical pickup, which optical system is used for performing recording, reproducing, and/or erasing of information on an optical recording medium and has a simple configuration, is provided. An optical pickup device | 10-07-2010 |
20110002217 | OBJECTIVE LENS AND OPTICAL PICKUP DEVICE - In order that thickness reduction, weight reduction, and mass productivity improvement should be achieved in an objective lens even in the case where NA is high, an objective lens according to the present invention is a bi-convex single lens having at least one aspheric surface, and satisfies conditions: (1) 3.501-06-2011 | |
20110032811 | DIFFRACTIVE OPTICAL ELEMENT, OBJECTIVE OPTICAL SYSTEM INCLUDING THE SAME, AND OPTICAL PICKUP INCLUDING THE SAME - A diffractive optical element includes a first optical part and a second optical part bonded to each other with a bonded surface therebetween configured as a diffraction surface. In this diffractive optical element, the diffraction order of diffracted light with the largest quantity of light out of diffracted light for one of a plurality of kinds of laser beams obtained on the diffraction surface is different from the diffraction order for at least another laser beam. | 02-10-2011 |
20110170398 | 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. | 07-14-2011 |
20110235492 | OPTICAL HEAD, DIFFRACTION DEVICE, OBJECTIVE LENS, AND OPTICAL DISC APPARATUS - An object of the present invention is to reduce the influence of a stray light incident on a light receiving device by reflection of an unnecessary diffraction light not contributing to write or read on a disc surface at write or read of an optical disc having a large surface reflectivity with respect to an information recording surface. A position in which a diffraction light with an n-order in an advancing path and the n-order in a returning path, reflected on the information recording surface of a first information recording medium, is focused by a condensing lens is different from a position in which a diffraction light different from the n-order diffraction light in at least one of the advancing path and the returning path, reflected on a surface of the first information recording medium, is focused by the condensing lens. | 09-29-2011 |