Mitsubishi Electric Corporation

Nihon Kohden Corporation

Mitsubishi Denki Kabushiki Kaisha

Namco Limited

Tamura Corporation

Nobutaka Kobayashi

Junichi Nishimae

Daiji Morita

Akihiro Yamada

Tomohiro Sasagawa

Hiroshi Kida

Akiko Fujiuchi

Yoshio Sakai

Takuo Aoyagi

Tomotaka Katsura

Tomohiro Kyoto

Tadashi Sasaki

Shinji Yagyu

Toshiaki Shoji

Ikuhiro Tsumura

Akio Masuda

Rena Nishitani

Nami Nakano

Nobuaki Arai

Masatoshi Kobayashi

Tadashi Kuroiwa

Kenichi Ijima

Chisako Oda

A wavelength combining laser apparatus includes: a semiconductor laser emitting laser beams in an optical-axial direction perpendicular to a laser beam combining direction; a wavelength combining element combining the laser beams in the laser beam combining direction into a single laser beam; a cross-coupling reduction optical system having positive power in the laser beam combining direction perpendicular to an optical axis of the single laser beam output from the wavelength combining element; and a partially-reflective mirror reflecting the single laser beam having passed through the cross-coupling reduction optical system and also allowing the single laser beam to transmit through and exit the partially-reflective mirror. The cross-coupling reduction optical system is disposed to image the light emitting end face on the partially-reflective mirror by causing the light emitting end face to be conjugate to the partially-reflective mirror in a plane formed by the optical axis and the laser beam combining direction.

Wavelength combining laser apparatus

A beam shaping device includes an SAC and an FAC. The SAC is placed between an LD bar and the FAC. A first incident surface and a first exit surface are formed in the SAC. The first incident surface includes a plurality of incident-side lens surfaces aligned in a slow axis direction X. The incident-side lens surfaces each have, in section orthogonal to a fast axis direction Y, a shape convexed toward the outside of the SAC and, in section orthogonal to the slow axis direction X, a shape concaved toward the inside of the SAC. The shape of the first incident surface and the shape of the first exit surface in section orthogonal to the slow axis direction X are concentric arcs having a point on an emission end surface of a light emitting layer as the center.

Beam shaping device and laser oscillator

A light source apparatus according to the present invention includes a phosphor wheel having a phosphor disposed in an annular shape on a disk-shaped base material, the phosphor serving to emit fluorescent light from excitation light, thereby forming an excitation light source having a predetermined color, and the phosphor having a discontinuous portion in a part of the annular shape, an excitation light source for emitting the excitation light with which a passage position of the circular phosphor is irradiated with respect to the phosphor wheel to be rotatively driven by the wheel motor, and a controller that controls light emission of the light source and the excitation light source synchronously with a position of the discontinuous portion with respect to an irradiation position of the excitation light.

Light source apparatus and projector

A planar light source deviceincludes a light sourceand a reflection member. The light sourceemits a light beamhaving directivity. The reflection memberhas a box shape including a single bottom-plate part, side-plate partsandconnected to the bottom-plate part, and an opening partfacing the bottom-plate part. The box shape has inner surfaces which are reflection surfaces. The bottom-plate parthas a quadrilateral shape including two facing short sides and two facing long sides. The light beamenters an inside of the box shape of the reflection memberthrough a side of the side-plate partconnected to the short side of the bottom-plate part, travels in a direction of the long side of the bottom-plate partwhile being reflected at the side-plate partsandconnected to the long sides of the bottom-plate part, and is emitted through the opening part. The reflection surfaces of the side-plate partsandconnected to the long sides of the bottom-plate partinclude regions at which the light beamis specularly reflected and regions at which the light beamis diffused and reflected.

Planar light source device and liquid crystal display apparatus

An irradiation device increasing the lighting depth and facilitating the assembling is provided. A transparent bar-shaped light guide having LEDs disposed near ends thereof includes a first prism group and a first reflector, and, a second prism group and a reflector which are provided so as to extend in a lengthwise direction and which diffuse and reflect light. The light guide includes a first light outgoing area emitting reflected light as primary light Lm, and a second light outgoing area emitting reflected light as secondary light Ls. The first light outgoing area includes a plane portion forming a flat surface. A plane mirror reflects the secondary light Ls in a direction overlapping the primary light Lm in a read area.

Irradiation device and image-reading device

A laser material processing apparatus for processing a workpiece () in such a way as to separate one laser light () into two laser beams () via first polarizer (), one laser beam being passed via the mirrors (), the other laser beam being scanned biaxially by a first galvano scanner (), and conduct two laser beams () to a second polarizer () for scanning via a second galvano scanner (), wherein an optical path is constituted such that the laser beam () transmitted through the first polarizer () is reflected by the second polarizer (), and the laser beam () reflected by the first polarizer () is transmitted through the second polarizer ().

Laser beam machining device

The objective is to prevent erroneous operation of an optical sensor while removing restrictions on the degree of freedom of design. In a handgun-shaped controller comprising a lens for focusing light that is incident on a muzzle and an optical sensorfor detecting the thus-focused light, a light-proof caseis provided to cover the lens and optical sensor in such a manner that external light other that from a muzzle is not incident thereon. The light-proof case covers the entire surface of the optical sensor and the portion of the board on which the optical sensor is mounted. Cut-out portionsA andB for through-holes for signal terminalsare provided in a connection portion between partsA andB that form the light-proof case. A protuberant portion is provided on the connection portion of one partA and a fit portion thereof is provided in the connection of another partB. A protuberant portion is provided so as to deform when a boardis pressed into slitsA andB, sealing the gaps between the slits and the board. The configuration could be such that the entirety of the board is covered by the light-proof case and the optical sensor is attached directly within the light-proof case.

Position indication device, and information storage medium

In a defibrillator with an electrocardiographic monitor which monitors electrocardiographic signals induced at electrodes by means of a preamplifier and supplying the signals to an electrocardiographic signal processing circuit through high-pass filters, the dynamic range of a preamplifier is made wider in accordance with the amplitude of a polarization voltage which is developed when a defibrillator is operated. A high-pass filter is formed of a first high-pass filter which operates in a normal state and a second high-pass filter whose blocking frequency is higher than that of the first high-pass filter so that the polarization voltage is attenuated without erasing the electrocardiographic signals. The second high-pass filter is operated in synchronization with the operation of the defibrillator during a time period corresponding to the time period in which the polarization voltage is generated.

Defibrillator with electrocardiogram monitor

An apparatus for determining the concentration of a light-absorbing material contained in blood flowing through a tissue which minimizes the amount of error caused by noise and which ensures highly precise results at all times. The apparatus operates according the principle that light beams of different wavelengths are absorbed by different amounts when passing through the tissue at different portions of the blood pulsation cycle. A plurality of points are detected that fall in the vicinity of the peak and trough of a cycle of a light detection signal. For each wavelength of light, the values of the detection signals produced at each of these points in time is stored. The concentration of the light-absorbing material is computed in response to the stored detection signals.

Apparatus for determining the concentration of a light-absorbing

Growing community of inventors

Tokyo, Japan

Nobutaka Kobayashi