Patent application number | Description | Published |
20090040908 | OPTICAL PICKUP AND OPTICAL INFORMATION PROCESSING APPARATUS - An optical pickup performing recording, reproduction and deletion of information on or from an optical recording medium. The pickup includes light sources for information recording media using a blue wavelength beam, information recording media of DVD family and information recording media of CD family. A single object lens may be used to condense light from any of the light sources. A single aberration correction device may be disposed in a common light path between each of the light sources and the object lens. | 02-12-2009 |
20090231981 | OPTICAL PICKUP AND OPTICAL DATA PROCESSING DEVICE USING THE SAME - An optical pickup including a light source, a light focus device, a diffraction element, an optical split element, a ¼ wavelength board, a light reception device and a correction element wherein the correction element is divided into multiple areas in a surface vertical to an optical axis, each area of the multiple areas has a sub-wavelength convexo-concave structure having a pitch equal to or shorter than a wavelength of the outgoing light beam and the sub-wavelength convexo-concave structures of the multiple areas adjacent to each other have groove directions perpendicular to each other, and the filling factors of adjacent areas of the multiple areas are determined to substantially equalize effective refractive indices with regard to the polarization direction of the outgoing beam emitted from the light source and impart a phase difference of π with regard to a polarization direction perpendicular to the polarization direction of the outgoing beam. | 09-17-2009 |
20090231982 | OPTICAL PICKUP AND OPTICAL DATA PROCESSING DEVICE USING THE SAME - An optical pickup including a light source, two light focus devices, a light reception device, a polarization selective light path splitting device, a polarization switching device, a first diffraction element including a periodic structure including two kinds of sub-wavelength convexo-concave structures while the two kinds of sub-wavelength convexo-concave structures alternately arranged at right angles to each other, and the filling factors of the two kinds of sub-wavelength convexo-concave structures are determined to substantially equalize effective refractive indices of the two kinds of sub-wavelength convexo-concave structures with regard to the polarization direction of the outgoing light beam, and the second diffraction element having a structure similar to that of the first diffraction element except that the filling factors are determined to substantially equalize effective refractive indices of the two kinds of sub-wavelength convexo-concave structures with regard to a polarization direction perpendicular to the polarization direction of the outgoing light beam. | 09-17-2009 |
20090315993 | IMAGE PICKUP AND METHOD OF DETECTING ROAD STATUS - An image pickup including a lens array having a substrate on which multiple lenses are provided; a filter including at least two polarizer areas with respective perpendicular axes which are separated according to beams of light which have passed through the respective lenses of the lens array; an image pickup unit including multiple image pickup areas that shoots images of an object by receiving the beams of light which have passed through the respective corresponding polarizer areas of the filter; a signal processing unit that processes image signals of the images of the object shot in the multiple image pickup areas of the image pickup unit, wherein a vertical polarization image is shot at one of the image pickup areas and a horizontal polarization image is shot at another image pickup area, and wherein the signal processing unit produces an image according to the polarization ratio of the vertical polarization image to the horizontal polarization image shot in the image pickup unit. | 12-24-2009 |
20090316025 | IMAGE PICKUP - An image pickup including a light emission portion that irradiates an object with near infrared; and an image pickup portion that receives a reflection light image of the object by the near infrared. The image pickup portion includes a lens array containing a substrate on which multiple lenses to respectively receive the reflection light image of the object by the near infrared are arranged; a light shield spacer that shields beams of light that have passed through the lens array from each other; a color filter separated into areas according to beams of light that pass through the light shield spacer, each of which transmits only particular beams of near infrared depending on the wavelengths thereof; and an image pickup element that simultaneously obtains multiple images of the object which are formed of each of the particular beams of near infrared having independent wavelengths that have passed through each of the areas of the color filter. | 12-24-2009 |
20100020401 | WAVELENGTH SELECTION FILTER, FILTER UNIT, LIGHT SOURCE DEVICE, OPTICAL APPARATUS, AND REFRACTIVE INDEX SENSOR - A wavelength selection filter selectively resonating and reflecting light of a given wavelength contained in incident light, includes a substrate having a rectangular waveform concave and convex structure which is formed on a plane on which the incident light falls incident, the concave and convex structure including convex portions and concave portions which are arranged in one axial direction and a multilayer structure including a first layer and a second layer respectively coating one and the other one of side surfaces, in the one axial direction, of each of convex portions of the concave and convex structure. A refractive index of the first layer and a refractive index of the second layer are both higher than a refractive index of the substrate. | 01-28-2010 |
20130208120 | ATTACHED MATTER DETECTOR AND IN-VEHICLE DEVICE CONTROLLER USING THE SAME - An attached matter detector includes a light source; an imager receiving transmitted light from a predetermined imaging region on a light-receiving region for an imaging region and imaging an image of the imaging region, and receiving reflected light on a light-receiving region for attached matter detection when light from the light source is reflected by attached matter and imaging an image of the attached matter; a parameter calculator of an image for an attached matter image region calculating a parameter of an image for an attached matter image region as information of an image region of the attached matter; a parameter calculator of an image for an imaging region calculating a parameter of an image for an imaging region as information of the imaging region; and an output device of an attached matter state signal outputting a signal showing a state of the attached matter based on the calculated parameters. | 08-15-2013 |
20140270532 | ATTACHED MATTER DETECTOR AND VEHICLE EQUIPMENT CONTROL APPARATUS - An attached matter detector includes a light source configured to irradiate light toward a plate-like transparent member from one surface thereof, an imaging device configured to image reflection light by attached matter on a surface of the plate-like transparent member, a memory configured to previously store flare information obtained by the image device by turning on the light source in a state without having disturbance light and the attached matter on the surface of the plate-like transparent member, and a difference information-obtaining device configured to obtain difference information between a light-up image as an image obtained by the imaging device with the turned-on light source and a light-out image as an image obtained by the imaging device with the turned-off light source, wherein the attached matter on the surface of the plate-like transparent member is detected based on the difference information and the flare information stored in the memory. | 09-18-2014 |
20150054954 | IMAGING UNIT AND METHOD FOR INSTALLING THE SAME - An imaging unit includes a light source, an imaging element to receive a light having entered an outer surface of the transparent plate-like member from a predetermined imaging area and transmitted through the transparent plate-like member and a light from the light source reflected by an attached matter on the outer surface, to capture an image of the predetermined imaging area and that of the attached matter, a mirror module fixed on the internal surface of the transparent plate-like member to fixedly support a reflective mirror to reflect the light from the light source, an imaging module to fixedly support the light source and the imaging element, fixed relative to the internal surface of the transparent plate-like member so that the imaging element captures an image in a certain direction, and a positioning mechanism to determine relative positions of the mirror module and the imaging module. | 02-26-2015 |