摘要:
A photosensor comprises a first electrode layer, a light-transmitting second electrode layer, and a laminate structure disposed between the two electrode layers and comprising a first photoconductive layer, a blocking layer and a second photoconductive layer (4) for charge injection as a result of modification of the electrical properties of the first photoconductive layer and of the blocking layer, the main component of the first photoconductive layer being silicon, the blocking layer being made of a substance having a broader band gap as compared with hydrogenated amorphous silicon and composed mainly of silicon and carbon or mainly of silicon and nitrogen or mainly of silicon and oxygen, and the main component of the second photoconductive layer being silicon and the silicon of the second photoconductive layer being doped with an element(s) of the group III or V of the period table. In this photosensor, the bright current can be increased while the dark current remains suppressed as in the conventional photodiode type photoelectric transducer devices.
摘要:
Provided is a backlight device having: a light source element having light emitting diodes and a lens expanding light from the light emitting diodes; a housing containing the light source element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the light source element, toward the diffuser plate. In the light source element, a plurality of the lenses are arranged at a central zone, the plurality of lenses being arranged in a plurality of rows.
摘要:
A high-NA and thin objective lens which prevents occurrence of a crack during lens molding and can stably be molded is provided. The present invention is directed to an objective lens having an optical surface having power which is not negative. The objective lens is a single lens and is formed such that a flat portion which is provided at an outer peripheral portion and perpendicular to the optical axis is closer to a disc surface than the position of the top of an exit-side surface of the objective lens and such that the rate of change in sag of the exit-side surface is continuous across the entire region.
摘要:
An optical system for optical pickup includes a magnification conversion optical element moving along an optical axis direction in accordance with each of optical recording medium recording surfaces, and an objective lens element converging a light beam incident through the magnification conversion optical element, to form a spot on a corresponding one of the recording surfaces, and satisfies the following formula: 4.0×10−4
摘要:
This invention provides a method of producing an epiblast-like cell (EpiLC) from a pluripotent stem cell, which comprises culturing the pluripotent stem cell in the presence of activin A; a method of producing a primordial germ cell-like (PGC-like) cell a pluripotent stem cell, which comprises culturing the EpiLC obtained by the method above in the presence of BMP4 and LIF. Also provided are a cell population containing PGC-like cells as obtained by the method, and reagent kits for the EpiLC- and PGC-like cell-induction from a pluripotent stem cell.
摘要:
A display device includes: a light source which emits light; a position detection unit which detects an eye position of a user; a light deflection unit which deflects the emitted light toward the eye position detected by the position detection unit; a user identification unit which identifies which one of persons is the user; a deflection control unit which controls a deflecting direction in which the light deflection unit deflects the light, depending on the person identified as the user; and a liquid crystal display panel which receives the light from the light deflection unit and display an image formed by the light.
摘要:
An optical system for optical pickup, which optical system is used for performing recording, reproducing, and/or erasing of information on an optical recording medium and has a simple configuration, is provided. An optical pickup device 1 includes a collimator lens system 23, a beam expander 33, and an objective lens system 34 that includes an S-SIL element 27b. The beam expander 33 includes a lens element 33c that is supported so as to be movable in a direction perpendicular to an optical axis. By moving the lens element 33c in the direction perpendicular to the optical axis, a coma aberration of a spot on a recording layer can be compensated in a state where the interval between a surface of an optical recording medium 28 and the S-SIL element 27b opposed thereto is maintained constant.
摘要:
Provides an objective lens, an optical head and an optical disc apparatus (drive) capable of compensating for various types of aberrations including wavelength changes for a plurality of types of optical discs including high density optical discs, DVDs and CDs with a good wavelength dispersion compensation ability and thus capable of providing good recording or reproduction characteristics.The objective lens according to the present invention includes a first lens and a second lens substantially in close contact with each other such that optical axes thereof match each other, and acts as a convex lens as a whole. Each lens includes a central portion including the optical axis and a peripheral portion located in a periphery of the central portion. The central portion of the first lens acts as a convex lens; and the central portion of the second lens acts as a concave lens. Where the refractive index of the first lens at d line (wavelength: 587.56 nm) is nd1, the Abbe constant of the first lens represented using the refractive indices at d line, F line (wavelength: 486.13 nm) and C line (wavelength: 656.27 nm) is νd1, the refractive index of the second lens at d line is nd2, and the Abbe constant of the second lens represented using the refractive indices at d line, F line and C line is νd2, the objective lens fulfills nd1>nd2 and νd1>νd2.
摘要:
An optical element which has optical steps each providing a phase difference to transmitted light and has low light amount loss and a high efficiency is provided. The optical element includes a symmetry axis, a plurality of optically functional surfaces which are ring-shaped regions around the symmetry axis, and a plurality of wall regions connecting the optically functional surfaces to each other. The optically functional surfaces and the wall regions constitute the optical steps. On a cross-section taken by, as a cutting plane, a plane including the symmetry axis, the contour line of each wall region is substantially parallel to a light beam which is incident on the optically functional surface on the outer side and passes near the wall region. The maximum value of the angle between the symmetry axis and the light beam passing near the wall region is equal to or more than 25 degrees.
摘要:
The present invention relates to a structure comprising: a resin pattern (A)3 formed on a base material 1 and having structure units of a predetermined shape; and a resin pattern (B)5 formed on a surface of the resin pattern (A)3 and having microscopic structure units, of a predetermined shape, arranged at a period shorter than or equal to a wavelength range of a using light, and to a method for producing the structure, comprising the steps of: (i) forming a resin layer 2 on the base material 1 and subjecting the resin layer 2 to an exposure-development process so as to form the resin pattern (A)3; and (ii) subjecting a surface of the resin pattern (A)3 to an exposure-development process so as to form the resin pattern (B)5, wherein the steps (i) and (ii) are sequential.