Matches 1 - 15 out of 15


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US20050151052 Dual three-spots optical scanning device  
A radiation detector array for radial tracking error detection for a dual-wavelength optical scanning device. Three spot detectors (100, 102, 104) for conducting three spot radial tracking error...
US20050072899 Inclination detector, optical head, optical information processor computer, video recorder, video reproducer, and car navigation system  
Light from a light source (1) is split by an optical splitting means (2) into a main beam and at least two subbeams. A focusing optical system (6) focuses the main beam and the subbeams to the...
US20060033004 Optical head device and adjusting method therefor  
An optical head device includes a laser beam emitting element, an objective lens, a light receiving element provided with a light receiving face, a beam guide mirror for guiding the reflected...
US20070001112 Optical element, optical pickup device, and optical information recording and/or reproducing apparatus  
It is to provide an optical element, an optical pickup device, and an optical information recording and/or reproducing apparatus, which can decrease the offset effectively and detect fine tracking...
US20080277562 Information Processing Device  
Light emitted from alight source (5) is reflected by the reflection film of a polarized beam-splitter (6), passes through collimating lens (7) and a mirror (8) to reach a convergence lens (9). The...
US20060266918 Optical pick-up device  
An optical pick-up device is provided that reduces aberrations in light irradiated from an optical recording meidu. The device includes a light source that outputs light for recordation and...
US20060016958 Objective optical element and optical pickup apparatus  
An objective optical element for use in an optical pickup apparatus which conducts reproducing and/or recording information for first, second and third optical information recording mediums,...
US20060261243 Optical reproducing apparatus capable of using laser diode of two wavelengths  
An optical reproducing apparatus having a photo detector using a laser diode of two wavelengths. A 16-split photo diode for detecting laser beams respectively for a DVD and a CD enables an optical...
US20080054157 Photodetector  
A photodetector to be incorporated in an optical pickup device, comprising: a photodiode that a laser light emitted from a laser diode is applied to and that outputs a signal corresponding to...
US20090278029 PICKUP DEVICE  
A pickup device includes an irradiation optical system containing an objective lens for forming a spot by converging a light beam onto a track of a recording surface of an optical recording medium...
US20060081761 Optical pickup apparatus and optical disk apparatus  
An optical pickup apparatus, comprises: a light source in which a plurality of light emitting points having different wavelengths are provided; a light receiving unit, receiving light reflected...
US20070051870 Optical pickup apparatus and information recording and reproducing apparatus  
An optical pickup apparatus and an information recording and reproducing apparatus are provided. When a focused state is obtained on a first light receiving portion corresponding to a first laser...
US20050247855 Optical pickup apparatus  
An optical pick up apparatus includes: a first, a second and a third light emitting points for emitting light beams; an optical system for introducing the light beams emitted from the first,...
US20080067321 OPTICAL INFORMATION DETECTING METHOD, OPTICAL HEAD, AND OPTICAL DISC APPARATUS  
In multilayer optical discs and high-speed optical discs, the amount of reproduction light per unit time greatly decreases and the reproduction signal quality (S/N) significantly drops due to the...
US20080089193 APPARATUS AND METHOD FOR CONTROLLING FOCUS JUMP BETWEEN RECORDING LAYERS IN HIGH-DENSITY MULTI-LAYER DISK  
An apparatus and method for controlling a focus jump between recoding layers in a high-density multi-layer disk. The apparatus includes: an optical pickup including an objective lens focusing...

Matches 1 - 15 out of 15