Patents by Inventor Kai MARUYAMA
Kai MARUYAMA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250389584Abstract: The spectroscopic analysis apparatus (1) includes a light source (11) configured to emit light comprising at least a first wavelength and a second wavelength, a spectrometer (12) configured to separate the light emitted from the light source (11) into light of the first wavelength and light of the second wavelength, a detector (14) configured to detect light of the first wavelength and light of the second wavelength that are emitted from the spectrometer (12) and pass through a sample(S), and a controller (16) configured to calculate first absorbance of the sample corresponding to light of the first wavelength and second absorbance of the sample corresponding to light of the second wavelength on the basis of a detection result of the detector (14), wherein the controller (16) calculates post-correction absorbance of the sample(S) corresponding to light of the first wavelength by correcting the first absorbance using the second absorbance.Type: ApplicationFiled: June 23, 2025Publication date: December 25, 2025Inventors: Kai MARUYAMA, Yoshimitsu OJIMA, Yuka IWAYA, Hiroyuki WADA, Jun HORIGOME
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Patent number: 12399063Abstract: A spectroscopic analysis system includes: an operation panel configured to receive an input of at least one of an upper limit value of a measurement period of a spectroscopic analysis spectrum or a lower limit value of measurement accuracy as a user setting condition related to measurement of the spectroscopic analysis spectrum of a sample; and a control unit configured to derive a predetermined recommended measurement condition that satisfies the user setting condition and cause a display unit to display the recommended measurement condition, in which the recommended measurement condition is at least one of a wavelength range of light to be used for measurement of the spectroscopic analysis spectrum, a sampling interval of a wavelength of the light, a slit width of a diffraction grating of a spectroscope that disperses the light, or a sweep speed of the wavelength of the light.Type: GrantFiled: June 28, 2023Date of Patent: August 26, 2025Assignee: HITACHI HIGH-TECH ANALYSIS CORPORATIONInventors: Akihiro Nojima, Yusuke Kaga, Takuya Kambayashi, Jun Horigome, Kai Maruyama
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Patent number: 11927527Abstract: When a measurement sample whose absorbance greatly changes depending on a wavelength range is measured, measurement with a high S/N ratio and accuracy can be efficiently performed in a short time. For a plurality of wavelength ranges in wavelength scanning measurement of a measurement sample, based on measurement conditions including one of a plurality of dimming plates (16a to 16e) to be disposed in each wavelength range and a scanning speed of a wavelength to be set in each wavelength range, when wavelength scanning measurement in which the entire measurement wavelength range including all of the plurality of wavelength ranges is scanned at once is performed, a spectrophotometer (100) changes one of the plurality of dimming plates (16a to 16e) and the scanning speed according to the measurement conditions for each wavelength range.Type: GrantFiled: June 15, 2022Date of Patent: March 12, 2024Assignee: HITACHI HIGH-TECH SCIENCE CORPORATIONInventors: Kai Maruyama, Takayuki Wakui
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Patent number: 11906428Abstract: Provided is a spectrofluorophotometer acquiring both a spectrum and a sample image in measurement of fluorescence of a liquid sample. A spectrofluorophotometer includes a light source, an excitation-side spectroscope that performs spectral dispersion of light of the light source and generates excitation light, a fluorescence-side spectroscope that performs spectral dispersion of fluorescence emitted from a sample irradiated with excitation light into monochromatic light, a sample container installation portion for holding a sample container which receives a liquid sample and is formed of a transparent material, a detector that detects fluorescence emitted from the liquid sample, and an image capturing device that captures a sample image of a sample emitting fluorescence.Type: GrantFiled: December 10, 2021Date of Patent: February 20, 2024Assignee: HITACHI HIGH-TECH SCIENCE CORPORATIONInventors: Kai Maruyama, Jun Horigome, Hideyuki Sakamoto
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Publication number: 20240011833Abstract: A spectroscopic analysis system includes: an operation panel configured to receive an input of at least one of an upper limit value of a measurement period of a spectroscopic analysis spectrum or a lower limit value of measurement accuracy as a user setting condition related to measurement of the spectroscopic analysis spectrum of a sample; and a control unit configured to derive a predetermined recommended measurement condition that satisfies the user setting condition and cause a display unit to display the recommended measurement condition, in which the recommended measurement condition is at least one of a wavelength range of light to be used for measurement of the spectroscopic analysis spectrum, a sampling interval of a wavelength of the light, a slit width of a diffraction grating of a spectroscope that disperses the light, or a sweep speed of the wavelength of the light.Type: ApplicationFiled: June 28, 2023Publication date: January 11, 2024Applicant: HITACHI HIGH-TECH SCIENCE CORPORATIONInventors: Akihiro Nojima, Yusuke Kaga, Takuya Kambayashi, Jun Horigome, Kai Maruyama
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Publication number: 20220412879Abstract: When a measurement sample whose absorbance greatly changes depending on a wavelength range is measured, measurement with a high S/N ratio and accuracy can be efficiently performed in a short time. For a plurality of wavelength ranges in wavelength scanning measurement of a measurement sample, based on measurement conditions including one of a plurality of dimming plates (16a to 16e) to be disposed in each wavelength range and a scanning speed of a wavelength to be set in each wavelength range, when wavelength scanning measurement in which the entire measurement wavelength range including all of the plurality of wavelength ranges is scanned at once is performed, a spectrophotometer (100) changes one of the plurality of dimming plates (16a to 16e) and the scanning speed according to the measurement conditions for each wavelength range.Type: ApplicationFiled: June 15, 2022Publication date: December 29, 2022Inventors: Kai MARUYAMA, Takayuki Wakui
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Patent number: 11486828Abstract: A fluorescence photometer includes a photometer unit and an optical fiber unit. The photometer unit includes a light source, an excitation-side spectroscope for separating light emitted from the light source to generate excitation light, and a fluorescence-side spectroscope for separating fluorescent light emitted from a sample irradiated with the excitation light to generate monochromatic light. The optical fiber unit guides the excitation light to the sample placed outside the photometer unit and guides the fluorescent light emitted from the sample to the photometer unit and includes an image fiber for capturing an image of the sample, an excitation-side fiber arranged around the image fiber and for guiding the excitation light to the sample, and a fluorescence-side fiber arranged around the image fiber and to guide the fluorescent light emitted from the sample to the photometer unit. The excitation-side fiber and the fluorescence-side fiber are arranged to surround the image fiber.Type: GrantFiled: March 9, 2020Date of Patent: November 1, 2022Assignee: HITACHI HIGH-TECH SCIENCE CORPORATIONInventors: Jun Horigome, Kai Maruyama, Koji Kurita, Hideyuki Sakamoto, Rino Nakajima, Naoki Suzuki
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Publication number: 20220205918Abstract: Provided is a spectrofluorophotometer acquiring both a spectrum and a sample image in measurement of fluorescence of a liquid sample. A spectrofluorophotometer includes a light source, an excitation-side spectroscope that performs spectral dispersion of light of the light source and generates excitation light, a fluorescence-side spectroscope that performs spectral dispersion of fluorescence emitted from a sample irradiated with excitation light into monochromatic light, a sample container installation portion for holding a sample container which receives a liquid sample and is formed of a transparent material, a detector that detects fluorescence emitted from the liquid sample, and an image capturing device that captures a sample image of a sample emitting fluorescence.Type: ApplicationFiled: December 10, 2021Publication date: June 30, 2022Inventors: Kai MARUYAMA, Jun HORIGOME, Hideyuki SAKAMOTO
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Publication number: 20200292453Abstract: A fluorescence photometer includes a photometer unit and an optical fiber unit. The photometer unit includes a light source, an excitation-side spectroscope for separating light emitted from the light source to generate excitation light, and a fluorescence-side spectroscope for separating fluorescent light emitted from a sample irradiated with the excitation light to generate monochromatic light. The optical fiber unit guides the excitation light to the sample placed outside the photometer unit and guides the fluorescent light emitted from the sample to the photometer unit and includes an image fiber for capturing an image of the sample, an excitation-side fiber arranged around the image fiber and for guiding the excitation light to the sample, and a fluorescence-side fiber arranged around the image fiber and to guide the fluorescent light emitted from the sample to the photometer unit. The excitation-side fiber and the fluorescence-side fiber are arranged to surround the image fiber.Type: ApplicationFiled: March 9, 2020Publication date: September 17, 2020Inventors: Jun HORIGOME, Kai MARUYAMA, Koji KURITA, Hideyuki SAKAMOTO, Rino NAKAJIMA, Naoki SUZUKI