| Patent application number | Description | Published |
|---|
| 20100016532 | NOVEL FLUORINATED COMPOUND, FLUOROPOLYMER AND METHOD FOR PRODUCING THE COMPOUND - To provide a novel fluorinated compound, a fluoropolymer and a method for producing the compound. | 01-21-2010 |
| 20100091634 | OPTICAL HEAD DEVICE - In an optical head device that subjects light exiting from a light source to reflection on an information recording layer of an optical disk, to thus guide the light to a photodetector, an optical attenuation device is disposed in an optical path from the optical disk to the photodetector, wherein the optical attenuation device has a first region having high transmissivity, a second region having low transmissivity, and a third region having an intermediate value of transmissivity, whereby light returned from a layer differing from the information recording layer, which will be responsible for crosstalk, is reduced by mean of the photodetector. | 04-15-2010 |
| 20100317808 | NOVEL FLUORINATED COMPOUND, FLUOROPOLYMER AND METHOD FOR PRODUCING THE COMPOUND - To provide a novel fluorinated compound, a fluoropolymer and a method for producing the compound. | 12-16-2010 |
| Patent application number | Description | Published |
|---|
| 20080226298 | Optical Transmission System - The present invention has been achieved to provide a novel optical transmission system realizing high-speed optical transmission over greater distance by suppressing waveform degradation caused by mode dispersion and mode transition in a multimode optical transmission line. The optical transmission system of the present invention includes: an optical transmitter for transmitting incoherent light; an excitation mechanism for exciting a predetermined mode in the incoherent light transmitted from the optical transmitter; a multimode optical transmission line for transmitting the incoherent light transmitted from the excitation mechanism; a transmission mechanism for transmitting a predetermined mode in the incoherent light transmitted from the excitation mechanism; and an optical receiver for receiving the incoherent light transmitted from the transmission mechanism or the incoherent light transmitted from the transmission mechanism. | 09-18-2008 |
| 20080253265 | OPTICAL HEAD APPARATUS - The present invention provides an optical head apparatus having: a light source emitting a linearly-polarized light; an objective lens focusing a light source light emitted from the light source on an optical recording medium; a light detector receiving a return light generated by reflecting the light source light by the optical recording medium; and a variable diffraction device having: a first polarized light diffraction grating; and a second polarized light diffraction grating, the variable diffraction device: diffracting an incident light of the linearly-polarized light by one of the first polarized light diffraction grating and the second polarized light diffraction grating; and transmitting the incident light without diffraction by the other thereof, the first polarized light diffraction grating having: first stripes including an anisotropic transparent material; and second stripes including an isotropic transparent material, the first stripes and the second stripes being alternately arranged in a first direction and in a first pitch to fill each space; the second polarized light diffraction grating having: third stripes including an anisotropic transparent material; and fourth stripes including an isotropic transparent material, the third stripes and the fourth stripes being alternately arranged in a second direction and in a second pitch to fill each space; the first polarized light diffraction grating and the second polarized light diffraction grating being different in at least one of the pitches and the directions, the variable diffraction device being capable of switching: either the first polarized light diffraction grating or the second polarized light diffraction grating diffracting the incident light; and the other thereof transmitting the incident light without diffraction by changing refractive indices sensed by the incident light with respect to the first polarized light diffraction grating and the second polarized light diffraction grating by an externally applied electric signal. | 10-16-2008 |
| 20090016191 | OPTICAL HEAD DEVICE - It is provided an optical head device which includes: a light source; an objective lens, configured to converge light emitted from the light source to an information recording surface of an optical disk; a beam splitter, configured to deflect returned light reflected by the optical disk into an optical path which is different from an optical path of the light emitted from the light source; a photo detector, configured to detect the returned light deflected by the beam splitter; and a depolarizing element, disposed on an optical path between the beam splitter and the photo detector, and configured to cause the returned light to transmit through while reducing a degree of polarization of the returned light. | 01-15-2009 |
| 20090110011 | OPTICAL COMPONENT FOR LASER BEAM - The present invention is to suppress deterioration of durability at the time when an optical component using a material optimized to be used in an optical path of a laser beam for performing reproduction/recording for a CD and a DVD is used in an optical head device using light sources including a blue semiconductor laser. A first transparent substrate | 04-30-2009 |
| 20090176954 | NOVEL FLUOROADAMANTANE DERIVATIVE, FLUORINE-CONTAINING POLYMER AND PRODUCTION METHOD - To provide a novel fluoroadamantane derivative, a novel polymerizable fluoroadamantane derivativeand a novel fluoropolymer, and processes for production thereof. | 07-09-2009 |
| 20100128593 | PHASE DIFFERENCE ELEMENT AND OPTICAL HEAD APPARATUS - Three phase difference layers having refractive index anisotropy are stacked in parallel and an optic axis angle and retardation of each of the phase difference layers are adjusted and thereby, characteristics having peaks at which ellipticity is approximated to 1 at desired three design wavelengths can be obtained and it can efficiently be adapted to an optical head apparatus for converting linear polarization of a light source with, for example, three different wavelengths into circular polarization. | 05-27-2010 |
| 20110149386 | OPTICAL LOW PASS FILTER - The present invention relates to a low pass filter including a wave plate capable of modulating incident light serving as image information such that A-polarized light and B-polarized light orthogonal to the A-polarized light are at an equivalent light quantity level over a visible light region, i.e., a transmittance takes a value close to 50%. According to the low pass filter of the present invention, it is possible to appropriately reduce a moiré phenomenon generated by an image sensor constituting the optical low pass filter including the above-described wave plate, and suppress degradation of an image quality caused by light quantity deflection of a separated light beam, and the low pass filter of the present invention is therefore useful. | 06-23-2011 |
