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US20080112303 |
Optical element, optical head, optical recording reproducing apparatus and optical recording/reproducing method
The invention presents an optical element with which an optical head can be configured, in which there is little deterioration of the correctional effect when the objective lens shifts, as well as...
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US20080068972 |
Optical pick-up apparatus and optical disc apparatus including the same
An optical pick-up apparatus having a plurality of light sources emitting light fluxes having different wavelengths from each other, an objective lens for focusing each of the light fluxes emitted...
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US20080068971 |
Optical pick-up apparatus and optical disc apparatus including the same
An optical pick-up apparatus having a plurality of light sources emitting light fluxes having different wavelengths from each other, an objective lens for focusing each of the light fluxes emitted...
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US20080068970 |
Optical-Recording Medium, Method for Producing the Same, and Method for Recording and Reproducing Optical-Recording
An object of the invention is to provide an optical-recording medium in which problems such as cross-write, i.e., signals are recorded wrongly on adjacent tracks, and cross-erase i.e., recording...
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US20080062849 |
Optical pick-up apparatus and optical disc apparatus including the same
An optical pick-up apparatus having a plurality of light sources emitting light fluxes having different wavelengths from each other, an objective lens for focusing each of the light fluxes emitted...
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US20080049582 |
Optical pickup device
An optical pickup device includes a spherical aberration compensating element which can compensate the spherical aberration of a light beam for a BD or a CD, and a phase shift element which can...
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US20080043597 |
Optical recording apparatus, recording method for optical recording medium and optical recording medium
Disclosed herein is an optical recording apparatus which may record post pre-format recording information on an optical recording medium which has a guide portion formed in advance for guiding a...
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US20080037404 |
Optical Disc Recording/Reproduction Device
An optical disc recording/reproduction device is provided, in which a tracking drive offset amount ( 21 ) is given to a tracking drive signal ( 19 ), a beam spot position irradiated on a...
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US20080037399 |
Optical disk apparatus compatible with different types of mediums adapted for different wavelengths
A polarizing beam splitter for separating an upstream beam from a downstream beam according to the polarization of an incident beam is provided between first and second light sources emitting laser...
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US20080008077 |
OPTICAL DISK DRIVE AND FOCUS OFFSET CONTROL METHOD
An optical disk drive includes an optical pickup which emits a light beam onto an optical disk, and receiving a reflection light to output a signal in accordance with the reflection light, a PRML...
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