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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 8130621 | Optical head device and optical disk playback system A recording and reproducing device that is capable of improving its reproduction quality by efficiently detecting a reproduction signal having small low frequency noises even when reproducing data on a super-resolution optical disk including recording marks smaller ... | 03/06/2012 |
| 8072867 | Optical pickup An optical-pickup hologram element has six regions on an x-y plane, divided as follows: the first region with a first line (an x-axis) and a second line that connects points (−xa, 0) and (−xb, yb); the second region with the first and second lines and a third li... | 12/06/2011 |
| 7990833 | Optical pickup device with diffraction patterns on object lens An optical pickup device, which reduces the size of an optical spot formed on an optical disk, and prevents the degradation of a tracking error signal due to coherent light from a layer adjacent a target recording/reproducing layer of the optical disk. The optical p... | 08/02/2011 |
| 7969850 | Optical element, optical pickup device comprising the same, and unnecessary light elimination method The optical element comprises a first diffraction structure for generating three beams by diffracting light from a light source and a second diffraction structure that exhibits structural birefringence for a prescribed polarized light returning to the light source. ... | 06/28/2011 |
| 7961583 | Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelen... | 06/14/2011 |
| 7929399 | Optical pickup device and optical disc device When recording on and/or reproducing from an information recording medium having a plurality of recording layers is performed, there has been a problem in appropriately detecting a control signal at the time of the recording and/or reproducing, since reflected light... | 04/19/2011 |
| 7924681 | Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelen... | 04/12/2011 |
| 7889617 | Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelen... | 02/15/2011 |
| 7876659 | Optical pickup and optical drive An optical pickup including a two-wavelength multilaser for generating a tracking error signal and a focusing error signal with high accuracy without light quantity variations which otherwise might be caused by the interference. An optical beam of first wavelength i... | 01/25/2011 |
| 7859976 | Optical pickup device In a photo pickup device, an incident area 30 for a reflection light of a light spot is divided into four areas 30a˜30d by parting lines 31, 32 making axial-symmetrical angles with a direction Y of a projected track on an o... | 12/28/2010 |
| 7848207 | Optical pickup An optical pickup includes: a first projector for projecting a first light beam of a first wavelength so as to record and reproduce information with respect to an optical disk having a first light transmissive layer; a second projector for projecting a second light ... | 12/07/2010 |
| 7792005 | Optical pickup apparatus On an optical path between a light source and an objective lens, there is provided an optical path changing section for changing a predetermined optical path of undesired light passing through, from the predetermined optical path to another optical path. The optical... | 09/07/2010 |
| 7782736 | Optical pickup for a disk apparatus An optical pickup includes: a frame, having a first face formed with a groove, a second face opposite to the first face, a first hole in which a diffraction grating is disposed, and a second hole communicated with the groove and the second face; a spring plate, atta... | 08/24/2010 |
| 7773490 | Optical compensator for use in an optical scanning device An optical compensator is included in an optical scanning device for scanning optical record carriers. There are at least two different information layer depths within two different carriers. The scanning device produces first to third radiation beams respectively h... | 08/10/2010 |
| 7724634 | Optical pickup apparatus with temperature compensation An optical pickup apparatus, comprising: a light source to emit a light flux; a light converging system including an objective lens to converge the light flux emitted from said light source onto an optical information recording medium; a first diffraction element pl... | 05/25/2010 |
| 7719948 | Lens unit for optical pick-up apparatus and optical pick-up apparatus The lens unit for the optical pick-up apparatus has: the objective lens by which the projecting light from the light source is condensed on the information recording surface of the optical information recording medium; the phase control element which is arranged on ... | 05/18/2010 |
| 7715299 | Objective optical system, optical pickup apparatus and optical information recording/reproducing apparatus with diffraction structure and optical path difference-generating structure The objective optical system of the present invention includes a first diffraction structure that applies diffraction to the light fluxes of wavelength λ1, wavelength λ2 and wavelength λ3 so that the diffracted lights of the L-th order (L: od... | 05/11/2010 |
| 7715300 | Diffraction element, objective lens unit, optical pickup and optical disc apparatus A diffraction element for diffracting a particular wavelength of incident optical beam includes: a base section made from a first resin and provided with a predetermined diffraction pattern; and a cover section made from a second resin and covering the diffraction p... | 05/11/2010 |
| 7706236 | Optical pickup and optical disc apparatus including a multi-section diffractive element An optical pickup including: a light source; a diffractive element; an objective lens; and a photodetector, wherein the diffractive element has first to fourth areas provided with a predetermined periodic structure in each of the areas, the second and third areas ha... | 04/27/2010 |
| 7697395 | Optical device, method of producing the same, optical pickup, and optical information processing device An optical device having a sub-wavelength grating formed in a specified region is disclosed that is able to prevent wave front degradation accompanying a phase difference of a polarized light beam passing through the optical device. The optical device includes a cir... | 04/13/2010 |
| 7688700 | Phase correction element and optical head device A phase correction element comprising a first phase correction layer formed in a region of numerical aperture NA2, and a first phase plate; the first phase correction layer comprising a concavo-convex portion having a rotational symmetry with respect to t... | 03/30/2010 |
| 7684305 | Optical pickup, optical recording and reproducing apparatus and tracking error signal detecting method An optical pickup includes an optical system in which light from a light source is introduced through an objective lens into an optical recording medium and in which light reflected from the optical recording medium is introduced into a light-receiving unit and an o... | 03/23/2010 |
| 7680014 | Objective optical system and optical pickup device using it An objective optical system is formed of a diffractive optical element with a diffractive surface formed on a virtual plane and an objective lens for focusing three collimated light beams of three different wavelengths at three different numerical apertures onto des... | 03/16/2010 |
| 7668065 | Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelen... | 02/23/2010 |
| 7606134 | Optical pickup An optical pickup includes: a first projector for projecting a first light beam of a first wavelength so as to record and reproduce information with respect to an optical disk having a first light transmissive layer; a second projector for projecting a second light ... | 10/20/2009 |
| 7542399 | Method and apparatus capable of detecting spherical aberration caused by a storage medium A method capable of detecting spherical aberration caused by a storage medium includes generating a plurality of light beams having distinct phases by diffracting light emitted from a light source using a diffractive optical element, measuring optical signals of the... | 06/02/2009 |
| 7522508 | Optical pickup An optical pickup includes: a first projector for projecting a first light beam of a first wavelength so as to record and reproduce information with respect to an optical disk having a first light transmissive layer; a second projector for projecting a second light ... | 04/21/2009 |
| 7515522 | Lensless optical servo system for an optically assisted disk drive A lensless optical servo system (100) has an unfocused light source (102) and patterned photodetectors (104, 106, 108). The unfocused light is reflected by the markings on an LS-120 disk (40) and the reflected light carries the pattern of... | 04/07/2009 |
| 7480227 | Optical head device and optical information apparatus using the same An optical head device includes a focusing optical system for focusing a laser beam emitted from a semiconductor laser light source on an optical information medium with an objective lens. A chromatic aberration correction element for correcting chromatic aberration... | 01/20/2009 |
| 7471610 | Optical pickup An optical pickup includes: a first projector for projecting a first light beam of a first wavelength so as to record and reproduce information with respect to an optical disk having a first light transmissive layer; a second projector for projecting a second light ... | 12/30/2008 |
| 7430076 | Diffraction element A diffraction element having concave/convex-like diffraction gratings in its two surfaces from which at least two separated light beams can be taken in the same direction without changing largely the propagating direction of diffracted light even if the temperature ... | 09/30/2008 |
| 7414949 | Semiconductor laser device and optical pickup device A semiconductor laser device includes: a semiconductor laser chip which is composed of a semiconductor substrate and a plurality of semiconductor layers stacked on an element formation face of the semiconductor substrate and which outputs an irradiation light for ir... | 08/19/2008 |
| 7408724 | Optical systems including a chromatic diffractive optical element corrector and associated methods A diffractive optical element (DOE) corrector for use with three different wavelengths includes a first diffractive element on a first surface of a first material, the first diffractive element diffracting a first wavelength of the three wavelengths, while directing... | 08/05/2008 |
| 7394746 | Optical head apparatus and optical information processing apparatus To reduce the optical path length of the entire optical system in a reproduction or recording optical system of an optical recording medium, and promote miniaturization and reductions in costs of apparatuses. An optical head apparatus has an optical system an includ... | 07/01/2008 |
| 7385906 | Objective lens, optical pickup, and optical information processing apparatus using the same An optical pickup includes a first optical source producing a first optical beam having a wavelength λ1, a second optical source producing a second optical beam having a wavelength λ2 (λ1 | 06/10/2008 |
| 7372794 | Compatible optical pickup applying tilt to objective lens in proportion to radial movement of objective lens A compatible optical pickup compatibly using a high density recording medium and at least one low density recording medium, includes an objective lens to form a light spot suitable for use on a recording surface of the high density recording medium by focusing a cor... | 05/13/2008 |
| 7372798 | Optical element and optical pickup device An optical element has a dichroic film held between transparent materials which transmits one of first light in a wavelength range of 390 to 425 nm and second light in a wavelength range of 630 to 820 nm and reflects the other light, and a first, a second, a third a... | 05/13/2008 |
| 7369479 | Optical miniaturized module, optical pickup device, and optical disk device provided with light source and photodetector The optical miniaturized module includes a semiconductor laser for irradiating an optical disk with laser light, a diffraction grating for forming a main beam and two sub beams from the laser light, a polarization hologram for dividing reflected light from the optic... | 05/06/2008 |
| 7366420 | Optical transmission device An optical transmission device for providing stable communication with a partner device by reducing errors in optical axis misalignment. Such errors are caused by uneven distribution of the light intensity in a received light beam resulting from atmospheric microsco... | 04/29/2008 |
| 7366078 | Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelen... | 04/29/2008 |
