Nec Corporation

Kagawa University

Photonics Electronics Technology Research Association

Takeshi Akagawa

Masahiro Kubo

Katsumi Abe

Yuji Ohno

Tetsuri Ariyama

Ersin Altintas

Kimiyasu Takoh

Ichiro Ishimaru

Kenichiro Yashiki

Naofumi Suzuki

Masayoshi Tsuji

Hiroshi Hatakeyama

Kimiyoshi Fukatsu

Takayoshi Anan

Soichiro Araki

Kenichiro Fujiyama

Mineto Satoh

Tan Azuma

Terumi Umematsu

An object of the present disclosure is to provide an optical measurement method, an optical measurement apparatus, and a non-transitory computer readable medium capable of specifying the position of a pore. The optical measurement method includes first, second, and third steps. In the first step (ST), first 3D tomographic image data is acquired from a skin by using optical coherence tomography. In the second step (ST), a line shown in a second planar image (B) at a second depth is removed from a first planar image (B) at a first depth, the second depth being deeper than the first depth. In the third step (ST), a position of a pore is specified from the first planar image (B) from which the line has been removed.

Optical measurement method, optical measurement apparatus, and non-transitory computer readable medium

An identification device including a generation unit and an information identification unit. The generation unit generates factor information relating to pulse-wave information with respect to an identification target in accordance with biological model information representing a relevance between pulse-wave information representing a pulse wave and the factor information representing a factor of pulse wave. The information identification unit selects certain list information satisfying a predetermined determination criterion of the factor information generated by the generation unit out of list information associating the factor information generated based on the pulse-wave information representing a pulse wave of a biological subject to be an identification target with identification information for identifying the biological subject, and identifies the identification information in the selected certain list information.

Identification device, identification method, and recording medium with recorded identification program

A living body determination device includes: a light irradiation device that irradiates a measuring object with a first light including a plurality of spectrums; a spectroscopic device that disperses a light at intensity depending on a wavelength and outputs the light; an image acquisition device that receives the light output by the spectroscopic device and outputs image information representing brightness depending on the intensity of the light; and a control unit. The control unit, for each spectrum of the first light, acquires image information with respect to the measuring object from the image acquisition device, based on the image information, selects one or more areas, for each of the areas, acquires spectroscopic information, and based on whether the spectroscopic information satisfies a predetermined condition, determines whether the measuring object is a living body.

Living body determination device, living body determination method, and living body determination program

To provide a fire sensing system, fire sensing method, and program with which it is possible to identify the position of a fire using a low number of sensors A fire sensing systemprovided with: gas sensorsfor sensing a change in gas concentration at three locations P, P, P; a gas propagation speed calculation unitfor sensing gas concentration increase times T, T, Tat the three locations P, P, Pand calculating the gas propagation speeds v, v, vat the three locations P, P, P; and a fire information estimation unitfor estimating the position of the fire on the basis of the gas concentration increase times T, T, Tand the gas propagation speeds v, v, v.

Fire sensing system, fire sensing method, and program

The purpose of the present invention is to provide a sphygmomanometer that has a high level of measurement accuracy and places a low burden upon a subject whose systolic pressure is being measured. To this end, the sphygmomanometer according to the present invention is characterized by comprising: a cuff pressure and pulse wave detecting unit that detects cuff pressure and pulse waves; and a blood pressure calculating unit that divides pulse waves detected by the cuff pressure and pulse wave detecting unit into a plurality of sections within a specific period, and calculates an estimated value for systolic pressure on the basis of fluctuations in the symmetry of the pulse wave waveform in the plurality of sections, said fluctuations occurring along with variations in the cuff pressure detected by the cuff pressure and pulse wave detecting unit.

Sphygmomanometer, blood pressure measurement method, and blood pressure measurement program

Optical measuring apparatus includes: a light source irradiating an object to be measured; a splitter splitting transmitted light or reflected light from the object to be measured; a phase changer changing a phase of a first light which is one of the lights split; a phase fixer maintaining a phase of a second light which is the other light split; a multiplexer multiplexing lights output from the phase changer and the phase fixer; a detector detecting the light (interference image) output from the multiplexer; and a controller that extracts a reference point from the interference image, when a displacement of the reference point is detected, corrects a luminance value for each pixel of the interference images in accordance with a displacement of the object to be measured indicated by a displacement of the reference point, constructs an interferogram based on the luminance value for each pixel of the interference images after the correction.

Optical measuring apparatus and optical measuring method

An object of the present invention is to provide an electrocardiogram measurement apparatus capable of significantly reducing the number of electrodes and measuring even a faint signal. The present invention provides an electrocardiogram measurement apparatus including a first electrode and a second electrode to be brought into contact with a body surface near an artery, an electrocardiogram measurement means for measuring a signal obtained from the first electrode and the second electrode, an artery position measurement means for identifying a position at which a measured value of a measured signal is largest as a position of an artery; and a notification means for notifying a user of information indicating the position of an artery.

Electrocardiogram measurement apparatus and electrocardiogram measurement method

A gas detection system, comprising: a humidity measuring apparatus that measures humidity; a transmitting apparatus that includes a light source which emits an optical signal of a plurality of wavelengths; and a receiving apparatus including: a light detection part that receives the optical signal from the transmitting apparatus; a discrimination part that determines whether or not condensation exists in at least one region of regions where the optical signal passes, based on the humidity measured by the humidity measuring apparatus and a light intensity of the optical signal received by the light detection part.

Gas detection system, gas detection method and program

Provided is an excrement analysis device capable of analyzing urine and feces simultaneously without increasing a burden of maintenance. The excrement analysis deviceof the present invention includes: a light sourcethat emits an inspection light toward an inspection area in a toilet bowl; spectroscopic information acquisition meansthat receives an inspection light emitted toward the inspection area and acquires spectroscopic information from the received inspection light; and analysis meansthat extracts a first space containing the largest amount of urine components and a second space containing the largest amount of fecal components from the acquired spectroscopic information, and outputs a result of analysis of urine and feces on the basis of spectroscopic information regarding the first space and the second space.

Excrement analysis device, toilet provided with said analysis device, and method for analyzing excrement

A light measurement device that maintains high measurement precision. The light measurement device includes: light source that irradiates light upon measurement object; branch part that splits transmitted light or reflected light from measurement object; phase-changing unit that changes the phase of one beam of the branched light beams; phase-fixing unit that maintains the phase of the other beam of the branched light beams; adjustment mechanism, which is provided in phase-changing unit or phase-fixing unit, for adjusting the propagation direction of light; multiplexer that causes the light emitted by each of phase-changing unit and phase-fixing unit to interfere with each other; detection unit that detects light that is interfered with by multiplexer; and control unit that controls the adjustment mechanism on the basis of the luminance values of an interference image that is detected by detection unit and adjusts the propagation direction of light in phase-changing unit or phase-fixing unit.

Light measurement device and optical axis adjustment method

A living body is accurately determined while minimizing increases in the size of a device and increases in the number of components. A living body determination device includes a spectroscopic devicethat disperses light entering from a pedestal side and outputs the result; a light emission devicethat emits first light toward the pedestal from a position facing the spectroscopic devicewith the pedestal therebetween; a light emission devicethat emits second light toward the pedestal from the spectroscopic deviceside; an image acquisition devicethat outputs image information indicating a brightness corresponding to the intensity of the light output by the spectroscopic device; and a calculation devicethat acquires first image information regarding each of the spectra of the first light from the image acquisition device, acquires first spectroscopic information on the basis of each of the pieces of first image information, acquires second image information regarding each of the spectra of the second light from the image acquisition device, acquires second spectroscopic information on the basis of each of the pieces of second image information, and determines whether or not a measurement targetis a living body, based on the first and second spectroscopic information.

Living body determination device, living body determination method, and program

[Object] To obtain interference light having a stronger light intensity, and to more accurately measure a refractive index of a measured object, with a simplified configuration. [Solution Means] A light measurement deviceincludes a phase adjustment unitand a detector. The phase adjustment unitoutputs reference light E(R) based on object light Ebeing light to be obtained by transmission or reflection of light E from a light source with respect to a measured object, and signal light E(S) whose phase is adjusted to be different from a phase of signal light. The detectorderives a transmission or reflection light intensity distribution or a refractive index of the measured object, based on interference light Ebetween signal light E(S) and reference light E(R) to be output by the phase adjustment unit. An optical axis of light E from a light source is linearly disposed. The phase adjustment unitand the detectorare disposed on the optical axis of light E from a light source.

Light measurement device

A biometric authentication apparatusaccording to the present invention can be installed in facilities such as airports in order to improve the reliability of biometric authentication to ensure a high level of security. The biometric authentication apparatusincludes a illumination unitwhich irradiates a human finger with light; an image acquisition unitwhich acquires a plurality of images indicating changes in luminance by receiving light scattered at the human finger that is a part of the light with which the human finger is irradiated by the illumination unitand converting the received light to luminance information according to the intensity of the light; an image-to-biometric-information conversion unitwhich converts the plurality of images acquired by the image acquisition unitto biometric information indicating a pulse wave in the human finger; and a biometric authentication unitwhich performs biometric authentication when a pulse wave signal which is the biometric information resulting from the conversion by the image-to-biometric-information conversion unitis greater than a predetermined threshold.

Biometric authentication apparatus and biometric authentication method

A pad-array arrangement structure on a substrate for mounting an IC chip on the substrate, wherein a structure with which it is possible to maximally avoid an increase in the number of wiring layers on the substrate is obtained by devising the pad arrangement in an IC pad-array region. A embodiment of the present invention provides a pad-array structure on a substrate for mounting an IC chip on the substrate. The present invention is characterized in that: a plurality of ground pads arrayed equidistantly in a first row, and a plurality of signal pads arrayed equidistantly in a second row on the inside of and parallel to the first row, are provided on a first circumferential edge in the pad-array region; each of the signal pads passes between two adjacent ground pads in the first row and is connected to an external circuit on the substrate; and electrical signals are input to and output from the external circuit.

Pad-array structure on substrate for mounting IC chip on substrate, and optical module having said pad-array structure

The present invention provides a surface-emission type semiconductor laser wherein an effective length of a cavity is reduced, thereby enabling to realize a higher-speed direct modulation. In the surface-emission type semiconductor laser according to the present invention, when supposing the optical path length (L) of a resonator part relative to a lasing wavelength &#x3bb;to be given as 0.9&#xd7;&#x3bb;&#x2266;L&#x2266;1.1&#xd7;&#x3bb;, and denoting the refractive indexes of a high refractive index layer and a low refractive index layer of a dielectric DBR by nand n; the average refractive index within an optical path length &#x3bb;/4 in the semiconductor in contact with the dielectric DBR by n; and the refractive indexes of the high refractive index layer and the low refractive index layer of a semiconductor DBR by nand n, respective materials to be used are selected so as to satisfy the following conditions (1) and (2):()()(),&#x2003;&#x2003;(1)

Growing community of inventors

Tokyo, Japan

Takeshi Akagawa