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US20090296559 |
OPTICAL SCANNING DEVICE
An optical scanning device for scanning optical record carriers having cover layers of different thicknesses. The scanning device has a first mode for scanning a first optical record carrier, a...
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US20090274020 |
OPTICAL HEAD UNIT AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS
An optical head unit is configured as an optical head unit corresponding to an optical recording medium of BD standard, and an optical recording medium of HD DVD standard. A magnification-variable...
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US20090252011 |
OPTICAL INFORMATION RECORDING/ REPRODUCING DEVICE AND OPTICAL INFORMATION RECORDING/ REPRODUCING METHOD
An optical information recording/reproducing device includes a liquid optical element containing a liquid crystal polymer layer in an optical head. A liquid crystal optical element drive unit...
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US20090238061 |
OPTICAL PICKUP APPARATUS AND OPTICAL INFORMATION RECORDING REPRODUCING APPARATUS
A structure according to the present invention is an optical pickup apparatus including a first light source, a second light source, a third light source, a first objective optical system, a second...
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US20090028034 |
TEMPERATURE CONTROL APPARATUS FOR OPTICAL CRYSTAL
A temperature control apparatus for optical crystal can employ a general temperature control element as is, can be controlled by a single temperature sensor and is applicable to patterns that...
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US20090022035 |
SPHERICAL ABERRATION CORRECTION CONTROL
A controller and a control method is provided to control a spherical aberration correcting device provided in an optical pick-up head to change a spherical aberration compensate value according to...
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US20090016194 |
Optical Pickup Device
An optical pickup device includes a first light source emitting first light with a first wavelength, a second light source emitting second light with a second wavelength, a third light source...
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US20080291808 |
Optical pickup device
An optical pickup device includes: a light source; an objective lens which condenses a light beam that is emitted from the light source on a recording layer of an optical recording medium; and a...
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US20080253262 |
Multi Layer Variable Refractive Index Unit
A variable refractive index unit ( 140 ) includes an optical axis and a first layer ( 144 a, 146 a, 146 a′ of controllably variable refractive index extending in a first predetermined...
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US20080231788 |
LIQUID CRYSTAL OPTICAL MODULATION ELEMENT AND OPTICAL HEAD DEVICE
To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. A liquid crystal...
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US20080205242 |
Multi-Radiation Beam Optical Scanning Device
An optical scanning device ( 1 ) for scanning an information layer ( 2 ) of an optical record carrier ( 3 ). The device includes a radiation source ( 7 ) for providing at least a first radiation...
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US20080205241 |
Optical Head With Switchable Diameter of the Radiation Spot on the Radiation Detector
In an optical scanning device ( 10 ) capable of scanning an information plane of an optical record carrier ( 5 ) of different types such as BD, DVD and CD, the diameter of the radiation spot on the...
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US20080181084 |
OPTICAL PICKUP
The liquid crystal element includes a pair of transparent substrates, a liquid crystal arranged between the substrates, a diffraction pattern including concentric diffraction electrodes formed on...
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US20080151736 |
OPTICAL PICKUP
The present invention aims to correct the spherical aberration and ensure the working distance and furthermore to obtain satisfactory recording and reproducing property by shaping the optical spot...
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US20080144473 |
OPTICAL ELEMENT AND OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS
An optical element is for generating recording signal light and reference light interferes with the recording signal light by changing an orientation state of a liquid crystal to record optical...
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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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US20080106983 |
Optical pickup apparatus
An optical pickup apparatus includes a plurality of laser light sources, a single objective lens, and a beam shaping mirror. The beam shaping mirror causes each of the laser beams to be incident on...
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US20080101201 |
Optical Pickup Device
The object of the present invention is to eliminate a broadband wavelength plate and to reduce a burden imposed on a manufacture and design of an optical pickup device. According to the present...
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US20080074963 |
OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE
A polarizing diffraction element is disposed between a photodetector and a liquid crystal lens to impart diffraction action to light reflected from a disk. The polarizing diffraction element is...
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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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