Matches 1 - 20 out of 20


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US20050135207 Optical system for detecting data signal and tracking error signal  
In an optical system, reflected light from the disk is diffracted by a hologram optical element, and received by an optical detector. A focusing error signal is detected from −1st-order diffracted...
US20050224693 Objective lens and optical pickup apparatus  
An optical pickup apparatus includes: a first light source for emitting a first light flux with a wavelength λ1 for recording and/or reproducing information on a first optical disc having a...
US20060268669 Optical pickup unit and information recording/reproducing apparatus  
An embodiment of the invention is useful for providing an optical pickup unit, which condenses light with different wavelengths at different positions and focal distances, and exactly detects a...
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...
US20050006558 Method of vertical deviation disc detection  
A method is provided to detect whether vertical deviation occurs as an optical disc spins in an optical disc player having a pickup head pre-installed in a balanced position at a focal distance....
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...
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...
US20060102826 Optical pickup device  
An optical pickup device includes: a separation section for separating a light beam into (i) a first light beam, which includes an optical axis of the light beam, and (ii) a second light beam,...
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...
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...
US20070120042 OPTICAL INFORMATION RECORDING-REPRODUCTION APPARATUS  
A collinear system optical information recording-reproduction apparatus is provided which gives sufficiently high interference modulation degree even with inexpensive semiconductor laser as the...
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...
US20050116137 Optical pick-up device for recording/reading information on optical recording medium  
An optical pick-up device for recording/reading an optical recording medium is provided, which can efficiently utilize light emitted from the laser light source. The optical pick-up device...
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...
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,...
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,...
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...
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...
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...
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...

Matches 1 - 20 out of 20