Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Application No. | Application Title | Issue Date |
| 20120127841 | PICKUP DEVICE AND OPTICAL DISC DRIVE ADOPTING THE SAME Provided are a single beam optical pickup device and a disc drive including the optical pickup device. The optical pickup device includes a light controlling device that prevents or limits stray light generated from a medium from being incident on a light sensor. The li... | 05/24/2012 |
| 20120127845 | OPTICAL PICKUP An optical pickup includes an objective lens, a lens holder which holds the objective lens, a focusing coil attached to the lens holder having the winding axis directed at the optical axis of the objective lens, and a magnet provided opposite the side surface of the len... | 05/24/2012 |
| 20120127846 | OPTICAL INFORMATION DEVICE AND INTERLAYER MOVEMENT METHOD IN OPTICAL INFORMATION DEVICE Provided is a method of, in movement between recording layers of an optical disc, resolving a problem caused by an increase in spherical aberration change as a result of widening of a layer interval at which the movement is made and executing appropriate interlayer move... | 05/24/2012 |
| 20120106313 | Optical Disk Device and Optical Disk Discriminating Method An optical disk discriminating method and an optical disk device which can detect reflected rays for making discrimination among kinds of optical disks with high accuracies. By switching a plurality of lasers and moving a spherical aberration corrector while moving an o... | 05/03/2012 |
| 20120106312 | OPTICAL PICKUP DEVICE A first laser light source emits first laser light of a predetermined wavelength, and a second laser light source emits second laser light of a wavelength different from the wavelength of the first laser light. Reflected light of the first and second laser light is ente... | 05/03/2012 |
| 20120082020 | OPTICAL PICKUP DEVICE An astigmatism element converges laser light in first and second directions to generate focal lines. A spectral element makes propagating directions of light fluxes entered into first through fourth areas different from each other to disperse the four light fluxes from ... | 04/05/2012 |
| 20120082021 | OPTICAL PICKUP DEVICE An optical pickup device, an optical drive using the same, and a method of forming a beam spot are provided. The optical pickup includes a light source system that includes a light source corresponding to at least one of a digital versatile disc (DVD) and a Blu-ray disc... | 04/05/2012 |
| 20120069727 | METHOD FOR EVALUATING READ SIGNAL A method for evaluating a read signal obtained by irradiating a medium with a laser beam through an objective lens and reading data from the reflected laser beam by a PRML detection method is provided. The method includes: a sampling step of sampling the data obtained f... | 03/22/2012 |
| 20120069722 | REPRODUCING DEVICE AND OPTICAL PATH LENGTH SERVO CONTROL METHOD A reproducing device includes a homodyne detection part that carries out homodyne detection by using reflected light of first light obtained from a recording layer as signal light and using reflected light of second light by a mirror as reference light, a signal reprodu... | 03/22/2012 |
| 20120069726 | Optical Storage Focus Servo System And Method Of Controlling Same An optical storage focus servo system may include an optical pickup unit that includes an astigmatic focusing lens, a focusing actuator that controls a position of the lens relative to an optical media, and a plurality of detectors that detect an intensity and shape of ... | 03/22/2012 |
| 20120051206 | OBJECTIVE LENS, LENS MANUFACTURING METHOD, AND OPTICAL DRIVE APPARATUS An objective lens includes: a solid immersion lens having a super-hemispherical or hemispherical shape, wherein a hyper-lens portion is formed in a part of an object-side surface of the solid immersion lens and integrated therewith by alternately stacking a first thin f... | 03/01/2012 |
| 20120026858 | OPTICAL PICKUP DEVICE An optical pickup device has an astigmatism element which imparts astigmatism to reflected light of laser light reflected on a recording layer, and a spectral element into which the reflected light is entered, and which separates the reflected light. The spectral elemen... | 02/02/2012 |
| 20120020198 | OBJECTIVE LENS AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS An optical information recording/reproducing apparatus for an optical disc using a light beam having a wavelength of λ including: an objective lens that converges the light beam onto a recording surface of the optical disc and satisfies a condition: | 01/26/2012 |
| 20120008485 | Objective Lens, Optical Pickup Apparatus, and Optical Information Recording Reproducing Apparatus An objective lens relating to the present invention includes a first optical path difference providing structure in which a first basic structure and a second basic structure are overlapped with each other. The first basic structure is a blaze-type structure which emits... | 01/12/2012 |
| 20120008475 | METHOD OF CONTROLLING LIGHT, AND OPTICAL PICKUP DEVICE AND OPTICAL DISK DRIVE ADOPTING THE METHOD An optical pickup device, an optical disk drive and method of controlling light performed by the optical pickup device are provided. The optical pickup device includes: a light transmitting system including an object lens for facing a medium having a multi recording lay... | 01/12/2012 |
| 20120008484 | OPTICAL INFORMATION RECORDING REPRODUCTION APPARATUS AND OPTICAL INFORMATION RECORDING REPRODUCTION METHOD An optical information recording reproduction apparatus includes: a first light beam source; a second light beam source emitting a beam with a wavelength shorter than that of the first light beam source; and an object lens condensing the beams from the first and second ... | 01/12/2012 |
| 20120002532 | Optical Pickup Device And Optical Disc Apparatus An optical pickup device includes a semiconductor laser for emitting laser light, an objective lens for irradiating luminous flux emitted from the semiconductor laser to an optical disc, a branching element having a plurality of regions for branching luminous flux refle... | 01/05/2012 |
| 20110317539 | Objective Optical Element and Optical Pickup Device Provided is an objective optical element which can appropriately correct degradation from spherical aberration upon fluctuation of a light source wavelength while maintaining light use efficiency, just by changing the magnification of the objective optical element, and ... | 12/29/2011 |
| 20110317538 | OPTICAL PICKUP ASSEMBLIES AND DRIVE SYSTEMS WITH THE SAME Disclosed are a pickup device assembly and an optical drive system. The assembly may comprise: a laser generator for generating laser beams; an objective lens; and at least one piezoelectric actuator for generating bending moments once applied with voltages, wherein the... | 12/29/2011 |
| 20110299377 | LENS AND OPTICAL PICK-UP A lens including: a lens body having first and second surfaces; a flange part formed to protrude from a periphery of the lens body and to have a cylindrical outer circumferential surface; a lens installation surface formed at an outer edge part of the flange part; a rec... | 12/08/2011 |
| 20110280115 | TILT ANGLE ADJUSTMENT METHOD FOR OBJECTIVE LENS AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS A method for adjusting a tilt angle of an objective lens with respect to one of a multilayer optical disc having a plurality of recording layers and an optical axis of an optical information recording/reproducing apparatus, wherein a use wavelength λ and a numerical ap... | 11/17/2011 |
| 20110267935 | OPTICAL PICKUP DEVICE An optical pickup which is configured to suppress resonances in the objective lens which are caused during tilt control of the objective lens is provided. The optical pickup device includes an objective lens, a lens holder for retaining the objective lens, and an actuat... | 11/03/2011 |
| 20110242953 | Systems and Methods for Testing Unformatted Optical Recording Media Various embodiments herein include one or more of systems, methods, software, and/or data structures to test and evaluate unformatted optical media such as optical tape and optical discs. Advantageously, testing and evaluation can be performed earlier in the manufacturi... | 10/06/2011 |
| 20110242951 | OPTICAL PICKUP, OPTICAL DRIVE APPARATUS, AND LIGHT ILLUMINATION METHOD There is provided an optical pickup including: an optical-system having an object-lens illuminating a first light for information recording or reproducing on a recording layer as a target and a second light on an optical-recording medium including a reference plane havi... | 10/06/2011 |
| 20110242959 | LAMINATED WAVE PLATE AND OPTICAL DEVICE USING THE SAME [Problems to be Solved] To obtain a laminated quarter-wave plate having a bandwidth of a plurality of wavelengths to be a phase difference of 90 degrees broadened [Means to Solve the Problem] A laminated wave plate of the present invention ... | 10/06/2011 |
| 20110235496 | OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS AND OBJECTIVE LENS FOR THE SAME An objective lens for an optical information recording/reproducing apparatus, at least one of optical surfaces of the objective lens comprising a diffraction surface having a diffraction structure defined by an optical path difference function, and wherein: the diffract... | 09/29/2011 |
| 20110228664 | OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS AND OBJECTIVE OPTICAL SYSTEM FOR THE SAME An objective optical system for information recording/reproducing, at least one of optical surfaces of the objective optical system comprising a diffraction surface including a first region contributing to converging first, second and third beams and including a diffrac... | 09/22/2011 |
| 20110216641 | OPTICAL PICK-UP In an optical pick-up used in common with DVD/CD and BD, when the thickness is intended to be reduced by mounting a total reflection mirror, a cavity for passing through a laser light is necessary and, since this decreases the degree of freedom for arranging tracking co... | 09/08/2011 |
| 20110211437 | OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS An optical pickup device including: a laser diode for emitting laser light; an objective lens which irradiates an optical beam emitted from the laser diode; an actuator which displaces the objective lens in a radius direction of the optical disc; a grating for branches ... | 09/01/2011 |
| 20110199884 | ABERRATION CORRECTING DEVICE, OPTICAL DEVICE, AND OPTICAL HEAD DEVICE The present invention relates to an aberration correcting device comprising: an aberration correcting element which modulates the phase of incident light; and a position adjusting section which can move the aberration correcting element in a direction perpendicular to a... | 08/18/2011 |
| 20110199883 | OPTICAL DISC APPARATUS AND METHOD FOR CONTROLLING THE SAME In recording or reproducing data on or from an optical disc with recording multi-layers, the focusing is likely to be out of control when an inter-layer jumping is carried out for changing a recording layer on or from which data is to be recorded or reproduced to anothe... | 08/18/2011 |
| 20110199882 | Objective Lens and Optical Pickup Device There are provided an optical pickup apparatus which can record/reproduce information properly at a time of temperature change or of using a multilayer disc, and an objective lens for use in the same. When temperature changes, spherical aberration resulting from a chang... | 08/18/2011 |
| 20110194391 | LASER DEVICE, OPTICAL PICKUP, AND OPTICAL DISK DEVICE A laser device includes a semiconductor laser, a signal generating circuit generating a pulse signal for driving the semiconductor laser, an amplifying circuit amplifying the pulse signal, and a control circuit unit provided between the amplifying circuit and the semico... | 08/11/2011 |
| 20110188367 | OPTICAL PICKUP DEVICE An optical pickup includes a collimator lens having a diverging lens and a converging lens, such that it maintains a constant focal length and has a short optical path length. The collimator lens of the optical pickup device includes a diverging lens located at the side... | 08/04/2011 |
| 20110182165 | OPTICAL PICKUP DEVICE AND OPTICAL DISC APPARATUS USING SAME According to the present invention, of all beams of light reflected from the optical disc, only light in a peripheral region excluding a push-pull region is used to generate a DPD signal. In this method of signal generation that optimizes internal light-receiving surfac... | 07/28/2011 |
| 20110182160 | OPTICAL DISC APPARATUS, DRIVING METHOD OF OPTICAL DISC APPARATUS An optical disc apparatus, for executing recording or reproducing on an optical disc having at least two (2) or more of recording/reproducing layers, comprises an optical pickup, having: a sphere aberration compensating portion, which is configured to set up a compensat... | 07/28/2011 |
| 20110170400 | LAMINATED HALF-WAVE PLATE, POLARIZING CONVERTER, POLARIZED LIGHT ILLUMINATION DEVICE AND LIGHT PICKUP DEVICE First and a second wave plates using quartz crystal having birefringence are laminated together in such a manner that their optical axes intersect to form a laminated wave plate functioning as a half-wave plate as a whole. Phase differences of the first and the second w... | 07/14/2011 |
| 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. The optical head device includes a plurality of l... | 07/14/2011 |
| 20110170399 | OPTICAL ENCODER HAVING OPTICAL ENCODING DISC An optical encoder includes an optical encoding disc, a light source module, a motor, and an optical detection system. The optical encoding disc includes a plurality of concentric annular tracks. Each track includes a plurality of coding units. Each coding unit includes... | 07/14/2011 |
| 20110164487 | INFORMATION RECORDING/REPRODUCING DEVICE AND INFORMATION RECORDING/ REPRODUCING METHOD A writing condition adjusting apparatus according to the present invention adjusts a writing condition using first and second recording patterns. The first recording pattern is used to adjust a writing condition for recording marks and spaces, of which the lengths are e... | 07/07/2011 |
