| Patent application number | Description | Published |
|---|
| 20080291573 | Magnetic Recording Medium, and Manufacturing Method, Manufacturing Apparatus, Recording and Reproduction Method, and Recording and Reproduction Apparatus for the Same - With a magnetic recording medium, servo pits have to be recorded one disk at a time, which is a problem in that it takes more time and is more expensive. In view of this, with the present invention, at least one signal region whose surface roughness is different from that of other than the signal region is formed on the substrate of a magnetic recording medium comprising a recording layer on a substrate, or on an under layer formed on a substrate. | 11-27-2008 |
| 20090129240 | GAP CONTROLLER AND OPTICAL INFORMATION PROCESSOR - A gap controller according to the present invention can set a reference level reasonably for a gap control that needs to be done to keep the gap between a solid immersion lens (SIL) and an optical disc constant. With the gap varied at a substantially regular step, gap detection signal levels are logged to find an extreme value of its second-order difference. And the gap control reference level is determined by the gap detection signal level that results in that extreme value. | 05-21-2009 |
| 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 |
| 20090290456 | OPTICAL DISC DEVICE, METHOD FOR ACTIVATING OPTICAL DISC DEVICE, AND CONTROL CIRCUIT - An optical disc device includes: a light source; a condensing system including a solid immersion lens for emitting light from the light source onto an optical disc; a gap control circuit for setting a distance between the solid immersion lens and the optical disc to a constant value; a CPU for adjusting a condensing position of emission light from the solid immersion lens with respect to an information recording/reproducing surface of the optical disc by moving a concave lens in a direction of an optical axis; and a focus control circuit for setting the condensing position on the information recording/reproducing surface, while following plane displacement of the information recording/reproducing surface, using a focus error signal. The CPU is operable to correct coma aberration in focus position adjustment by moving the concave lens in a direction perpendicularly intersecting with the optical axis. | 11-26-2009 |
| 20090310467 | OPTICAL INFORMATION DEVICE - An optical information apparatus according to the present invention includes: an optical system that includes a solid immersion lens (SIL) | 12-17-2009 |
| 20100118665 | DEVICE AND METHOD FOR RECORDING AND/OR REPRODUCING DATA ONTO/FROM INFORMATION RECORDING MEDIUM BY USING NEAR-FIELD LIGHT AND INFORMATION RECORDING MEDIUM - An apparatus | 05-13-2010 |
| 20100220574 | INFORMATION RECORDING MEDIUM AND RECORDING/REPRODUCING METHOD FOR THE SAME - The information recording medium ( | 09-02-2010 |
| 20100232264 | OPTICAL INFORMATION RECORDER/REPRODUCER, OPTICAL INFORMATION RECORDING/REPRODUCING METHOD AND CONTROL CIRCUIT - A distance control circuit ( | 09-16-2010 |
| 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 |
| 20100278030 | 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 | 11-04-2010 |
| 20110002208 | OPTICAL DISK DEVICE AND TILT CORRECTION METHOD FOR OPTICAL DISK DEVICE - An optical disk device has: a detector ( | 01-06-2011 |
| 20110007613 | OPTICAL RECORDING/REPRODUCTION METHOD, OPTICAL RECORDING/REPRODUCTION DEVICE, PROGRAM, AND OPTICAL RECORDING MEDIUM - In optical recording and/or reproduction using an SIL optical system that performs a tilt servo using light for recording and/or reproduction, the SIL and an optical recording medium have a high probability of colliding with each other before the tilt servo is started. To prevent the collision, an optical recording/reproduction method performs a gap servo that controls a gap between a surface of an optical recording medium and a bottom surface of an SIL using reflected light that is generated from light traveling from the bottom surface of the SIL and reflecting on the optical recording medium, a focus servo that controls a distance between a focal point of the light and the bottom surface of the SIL, and a tilt servo that controls a tilt of the bottom surface of the SIL relative to the surface of the optical recording medium using the reflected light. The method includes the acts (A), (B), and (C), which are performed sequentially: (A) starting the gap servo with the gap being set larger than when optical recording and/or reproduction is performed, and shifting the focal point to an optical recording medium side from the bottom surface of the SIL, (B) starting the tilt servo, and (C) setting the gap smaller and arranging the SIL at a predetermined position. | 01-13-2011 |
| 20110069599 | OPTICAL INFORMATION RECORDING AND/OR REPRODUCING APPARATUS, OPTICAL INFORMATION RECORDING AND/OR REPRODUCING METHOD, OPTICAL INFORMATION RECORDING MEDIUM, AND SOLID IMMERSION LENS - An optical information recording and/or reproducing apparatus comprises: a focusing unit ( | 03-24-2011 |
