Seiko Epson Corporation

Hokkaido University

Kazuhiro Nishida

Tomiyoshi Ushiyama

Osamu Ishibashi

Koichi Shimizu

Kazuhiko Amano

Katsuyuki Uehara

Kimio Nagasaka

Chiyoaki Iijima

Jun Amako

Akira Ikeda

Katsumi Tanaka

Katsumitsu Hama

Takeshi Takezawa

Akitaka Yajima

Hirohisa Nakano

Sumio Utsunomiya

Shuji Narimatsu

Takeshi Takizawa

Hirotaka Yanagisawa

Hideaki Yamada

Kimitake Mizobe

Hirokazu Kasahara

Akira Momose

Masahide Tsuda

Makoto Fuse

Sakiko Shimizu

Hisamaro Kato

Osamu Fujimaki

Kenji Goto

Kenshi Sakai

Takafumi Ito

Fumie Kawai

Hirtaka Yanagisawa

Yuji Kato

An internal temperature measuring device is configured to include an acquisition unit that acquires a one side temperature and a one side heat flux of a measurement target on a one side surface side and an opposite side temperature and an opposite side heat flux of the measurement target on an opposite side surface side; and a computation unit that computes an internal temperature of the measurement target by applying the one side temperature, the one side heat flux, the opposite side temperature, and the opposite side heat flux.

Internal temperature measuring device, wrist mounting-type device, and method of measuring internal temperature

A blood pressure measurement device includes: a light emitting unit configured to irradiate a living body with measurement light; a light receiving unit configured to receive reflected or transmitted light of the measurement light; and a computational unit configured to calculate a blood flow and a volume pulse wave based on a light-receiving result from the light receiving unit, and to calculate blood pressure based on the blood flow and blood vessel resistance that is obtained from the volume pulse wave.

Blood pressure measurement device, electronic device, and blood pressure measurement method

An optical rotation measurement method includes causing measurement light of a predetermined polarization to be incident on a subject from an incident direction that is a non-right angle to the subject, discriminating an optical rotation reflecting component of the predetermined polarization from reflected light that is reflected in a different direction to the incident direction of the subject, and measuring the optical rotation based on the discrimination result.

Optical rotation measurement method and optical rotation measurement apparatus

In a biological information processing apparatus, a body motion detection unit detects a body motion of a subject. A measurement method selection unit selects one measurement method on the basis of a detection result from the body motion detection unit, from among a plurality of measurement methods of measuring a blood glucose level by applying irradiation waves toward a living body of the subject. A measurement result display control unit performs control for displaying a measurement result which is obtained by performing a measurement according to the one measurement method.

Biological information processing apparatus, and biological information processing method

In a concentration measuring device, a measuring light in a wavelength region where an absorbance related to the water in a subject can be practically ignored is irradiated to the subject by a light source. The transmitted light transmitted through the subject is received in a light receiving part. An optical rotation calculation part calculates an optical rotation of the subject by using an output signal from the light receiving part, and an absorbance calculation part calculates an absorbance of the subject by using an output signal from the light receiving part. A concentration calculation part calculates a concentration of glucose by using a glucose measurement data related to an aqueous solution of simple glucose, a protein measurement data related to an aqueous solution of simple protein, the optical rotation calculated by the optical rotation calculation part, and the absorbance calculated by the absorbance calculation part.

Concentration measuring device and a method of controlling the concentration measuring device

A light absorption coefficient distribution estimation device includes a detection section and a light absorption coefficient distribution estimation section. The detection section detects the received light intensity of scattered light from a subject at a plurality of light-receiving positions that differ in distance from an irradiation position at which measurement light is applied to the subject. The light absorption coefficient distribution estimation section estimates the light absorption coefficient distribution of the subject using the received light intensity, a propagation optical path length model that specifies a propagation optical path length on a basis of the distance, and a first model that specifies the received light intensity on a basis of the distance when absorption of light is at a predetermined value.

Light absorption coefficient distribution estimation device, concentration measurement device, and method for controlling light absorption coefficient distribution estimation device

A concentration determination apparatus in accordance with exemplary embodiments has a storage body and a temperature control plate. The concentration determination apparatus may also have a first and second input light guide and a first and second light receiving light guide, and an operational unit that contains an absorbance calculation device for calculating an absorbance of liquid and living body tissue and a concentration calculation device for comparing the absorbance of the liquid and the living body tissue.

Concentration determination apparatus and concentration determination method for detecting an absorbance of living body tissue based on a light intensity and measuring a concentration of a measured component contained in living body tissue

A first temperature sensor is formed in a first measurement area. A first input part is formed in the first measurement area so that an output surface thereof is exposed to the inner surface of the liquid tank. A first light receiving part receives a reference light through the liquid from the first input part. A second input part causes a second incident light to be incident on a living body. A second light receiving part receives a measurement light from the second input part. Based on the light intensity of the reference light and the measurement light, an absorbance calculation device can detect the absorbance of the liquid and living body tissue. A concentration calculation device compares the absorbance of the liquid with the absorbance of the living body tissue and calculates a concentration of a measured component contained in the living body tissue.

Concentration determination apparatus and concentration determination method for measuring a concentration of a measured component contained in a living body tissue

A concentration measurement method by an absorptiometric method which measures a concentration of a first solute component dissolved in a solution, in which the first solute component interacts with a solvent, includes: referring to an absorption coefficient (&#x3bc;(&#x3bb;)) of the solvent; measuring an absorption coefficient (&#x3bc;(&#x3bb;)) of a first sample material, after an interaction between the solvent and the first solute component has occurred; and obtaining an unknown volume fraction (v) of the first solute component and a volume fraction (v) of the solvent, based on the absorption coefficient (&#x3bc;(&#x3bb;)) of the solvent, a apparent absorption coefficient (&#x3bc;'(&#x3bb;)) of the first solute component, and the absorption coefficient (&#x3bc;(&#x3bb;)) of the first sample material.

Concentration measurement method and concentration measurement apparatus

A projector includes: an illuminator that emits an illumination light flux; a light control mechanism that blocks at least part of the illumination light from the illuminator; a light modulator illuminated with the illumination light from the illuminator; a projection system capable of projecting modulated light formed by the light modulator and switching the f number when the modulated light is projected; and a control unit that controls the open/close state of the light control mechanism in accordance with the f number of the projection system so that illumination light having an angular distribution corresponding to the f number of the projection system is incident on the projection system.

Projector having light amount control based on projection system F-number

An illumination apparatus includes: first and second lamps; and a combining mirror configured to combine emitted lights from the first and second lamps The combining mirror includes first and second reflection surfaces opposing the first and second lamps respectively, being abutted vertically with respect to each other, whereby forming an edge. Since optical axes of the first and second lamp are respectively inclined with respect to a reference axis being orthogonal to a system optical axis of the illumination apparatus, central axes of the lights from the first and second lamps are incident on a downstream optical system in a state of being slightly inclined with respect to the system optical axis after being reflected on the first and second reflection surfaces respectively.

Illumination apparatus and projector having the same

An electro-optical display device includes: a reflection-type liquid crystal panel that has a driving substrate, on which a reflective layer is disposed, and an opposing substrate facing each other with a liquid crystal interposed therebetween; and an light-transmissive substrate that is disposed on an outer side of the opposing substrate, wherein any one or more values of thermal expansion coefficients of a plurality of element substrates including at least the opposing substrate and the light-transmissive substrate are negative, and any one or more values of the thermal expansion coefficients of the plurality of element substrates are positive.

Electro-optical display device and projector

An electro-optical display device includes: a transmission-type liquid crystal panel that has a driving substrate and an opposing substrate facing each other with a liquid crystal interposed therebetween; a first light-transmissive substrate that is disposed on an outer side of the driving substrate; and a second light-transmissive substrate that is disposed on an outer side of the opposing substrate, wherein any one or more values of thermal expansion coefficients of a plurality of element substrates including at least the driving substrate, the opposing substrate, the first light-transmissive substrate, and the second light-transmissive substrate are negative, and any one or more values of the thermal expansion coefficients of the plurality of element substrates are positive.

A projector having a first lens array with a plurality of first lenses in a plane substantially orthogonal to an optical axis of the light beam from a light source that divides the light beam into a plurality of partial light beams, a second lens array having a plurality of second lenses corresponding to the plurality of first lenses, and a polarization converter that is disposed on a light beam emitting-side of the first lens array. A focal position in a first direction of the first lens is set in the vicinity of the second lens array in the optical direction of the light beam irradiated from the first lens. A focal position in the second direction of the first lens is set in the vicinity of the polarization converter in the optical direction of the light beam irradiated from the first lens.

Projector

An auxiliary reflecting mirror is manufactured by heating the central portion of a quartz glass tube and compressing the central portion by pushing two end portions of the quartz glass tube so that the wall thickness of the central portion thickens, accommodating the quartz glass tube after thickening the wall thickness of the central portion in a mold having inner surfaces formed to the reflecting surface shape, which is to be formed in an auxiliary reflecting mirror, and forming an expanded portion by expanding the central portion, of which the wall thickness was thickened, by introducing a gas from the two ends of the quartz glass tube, cutting the quartz glass tube in at least the central portion of the expanded portion, evaporating a reflecting film on the outer surface of the expanded portion and forming a reflecting surface.

Growing community of inventors

Matsumoto, Japan

Kazuhiro Nishida