Hamamatsu-photonics K.k.

Tomoya Nakazawa

Shinichi Ohba

Rui Sekine

Akio Suzuki

Akinori Asai

Toru Fujita

Taiga Morimoto

Fumitsugu Fukuyo

Ryota Kakei

Yu Matsushiro

Shin Kato

Masaru Shimomaki

Yu Hashimoto

Masato Kitabayashi

Anna Ienaka

A fiber structure includes first and second optical fibers disposed such that tip portions thereof butt and a sheet-shaped saturable absorber sandwiched between the tip portion of the first optical fiber and the tip portion of the second optical fiber. Each of the tip portions of the first optical fiber and the second optical fiber has a core, a cladding provided around the core, and a ferrule provided around the cladding. The tip portion of the first optical fiber has a protruding shape protruding to a tip side. The saturable absorber has an adhering part at least adhering to the core of the first optical fiber and a non-adhering part present around the adhering part and not adhering to the tip portion of the first optical fiber.

Fiber structure, pulse laser device, supercontinuum light source, and production method for fiber structure

A viscoelastic characteristics acquisition device is a device that acquires viscoelastic characteristics of a blood vessel of an inspection target, and includes a pulse wave acquisition unit that acquires a time waveform corresponding to a volume pulse wave of the inspection target, a spectrum acquisition unit that acquires a volume pulse wave spectrum by performing Fourier transform on the time waveform, an input unit to which values corresponding to maximum blood pressure and minimum blood pressure of the inspection target are input, and an analysis unit that acquires the viscoelastic characteristics on the basis of the values corresponding to the maximum blood pressure and the minimum blood pressure and the volume pulse wave spectrum at a frequency equal to or higher than a frequency corresponding to the pulse of the inspection target.

Viscoelasticity characteristics acquisition device, viscoelasticity characteristics acquisition method, viscoelasticity characteristics acquisition program, and recording medium recording said program

A fiber structure includes first and second optical fibers disposed such that end portions thereof butt, a sheet-shaped saturable absorber including a carbon nanotube and disposed between the end portion of the first optical fiber and the end portion of the second optical fiber, and a housing internally accommodating the end portion of the first optical fiber and the end portion of the second optical fiber. A space in the housing including the saturable absorber is airtight.

Fiber structure, pulse laser device, and supercontinuum light source

A light emitting sealed body includes: a housing containing light-emitting gas in an internal space, on which laser light for maintaining a plasma generated in the light-emitting gas is incident; and a charging pipe including a first end portion and a second end portion and connected to the internal space at the first end portion. The second end portion of the charging pipe is sealed by being crushed. The second end portion of the charging pipe is covered with a covering member consists of an inorganic material. The covering member is covered with a cap member consists of a metal material.

Light emitting sealed body and light source device

A light emitting sealed body includes: a housing containing light-emitting gas in an internal space and formed with an opening on which first light is incident and/or from which second light is emitted, wherein the first light is laser light for maintaining a plasma generated in the light-emitting gas and the second light is light from the plasma; and a window member that transmits the first light and/or the second light at the opening. The window member is joined to the housing by a joining material consisting of a material containing gold.

A light emitting sealed body includes: a housing containing light-emitting gas in an internal space; a first window portion provided to the housing and on which first light that is laser light for maintaining a plasma generated in the light-emitting gas is incident; and a second window portion provided to the housing and from which second light that is light from the plasma is emitted. The second window portion includes a second window member made of a material containing diamond. A protective layer made of an inorganic material is formed at least on a surface of the second window member on a side of the internal space.

A light emitting sealed body includes: a housing containing light-emitting gas in an internal space; a first window portion which is provided to the housing and on which first light that is laser light for maintaining a plasma generated in the light-emitting gas is incident; a second window portion provided to the housing and from which second light that is light from the plasma is emitted; and a getter portion including a getter material and disposed in an irradiation region of the first light inside the housing.

Light emitting sealed body, light source device, and method for driving light emitting sealed body

A blood glucose measurement device, a blood glucose calculation method, and a blood glucose calculation program capable of accurately measuring a blood glucose level by using light are provided. The blood glucose measurement device includes a light sourcethat outputs measurement light Lto be input to a living body; a light detectorthat detects the measurement light Lpropagated inside the living bodyand generates a detection signal in accordance with an intensity of the measurement light L; and a computation unit that obtains a time lag between a temporal change in a first parameter related to an oxygenated hemoglobin concentration and a temporal change in a second parameter related to a deoxygenated hemoglobin concentration based on the detection signal, and obtains the data related to the blood glucose level based on the time lag.

Blood glucose measurement device, blood glucose calculation method, and blood glucose calculation program

A blood pressure information calculating device includes an input unit to which a waveform based on a pulse wave of the subject and reference blood pressure information serving as a reference for calculating the blood pressure information on the basis of the waveform based on the pulse wave are input, a conversion unit that calculates a phase spectrum of a waveform based on the pulse wave by performing Fourier transformation on the waveform based on the pulse wave, a calculation unit that calculates a correction value using at least one of a phase of a main wave corresponding to a pulse of the subject and a phase of a second harmonic wave of the main wave on the basis of the phase spectrum, and a calculation unit that calculates an average blood pressure by correcting the reference blood pressure information using the correction value.

Blood pressure information calculating device, blood pressure information calculating method, blood pressure information calculating program, and recording medium for recording said program

A blood pressure ratio calculation device is a device for calculating a maximum-minimum blood pressure ratio corresponding to a ratio between a maximum blood pressure value and a minimum blood pressure value of an inspection target, and includes an input unit for inputting a relative blood pressure waveform corresponding to temporal change in relative blood pressure of the inspection target, a spectrum generation unit for generating a relative blood pressure waveform spectrum by performing Fourier transform on the relative blood pressure waveform, and an analysis unit for calculating the maximum-minimum blood pressure ratio on the basis of the relative blood pressure waveform spectrum.

Blood pressure ratio calculation device, blood pressure ratio calculation method, blood pressure ratio calculation program, and recording medium recording said program

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Hamamatsu, Japan

Tomoya Nakazawa