Abstract: Provided are a light scattering measuring apparatus. The light scattering measuring apparatus includes: light sources; a single light receiver; a sample holder including a cell, a frame body, a first opening formed in an incident portion of a first optical path used for forward measurement or side measurement, and a second opening formed in an incident portion of a second optical path used for back measurement, and an optical element; and a moving mechanism. The first optical path and the second optical path are separated from each other in vertical direction. The moving mechanism moves the first opening to a position of the incident portion of the first optical path when the forward or side measurement is to be performed, and to move the second opening to a position of the incident portion of the second optical path when the back measurement is to be performed.

Abstract: An optical measurement apparatus including: an irradiation optical system configured to irradiate a measurement subject with irradiation light that includes a plurality of wavelengths; a reception optical system configured to receive measurement light that is transmission light or reflection light travelling from the measurement subject as a result of the measurement subject being irradiated with the irradiation light; and a polarizing plate, wherein the polarizing plate is configured to be able to be provided in either the irradiation optical system or the reception optical system.

Abstract: Provided is a photodynamic therapy device that enables efficient light irradiation of blood of a patient. A photodynamic therapy device (100) of this disclosure includes a cartridge (10) including a winding core and a tube arranged so as to be wound around the winding core, a casing (50) configured to accommodate the cartridge (10), and a light source (60), which is arranged inside the casing (50), and is configured to irradiate the tube with light. The tube arranged around the winding core has a cross section taken along a direction orthogonal to an extending direction of the tube, which has a first dimension in a first direction and a second dimension in a second direction orthogonal to the first direction. The second dimension is smaller than the first dimension. The second direction is directed outward with respect to the winding core.

Abstract: To provide a zeta-potential measurement jig which does not require dedicated tools and enables placement of a sample in a cell with simple work. Provided is a zeta-potential measurement jig, to be used for an electrophoretic mobility measuring device, including: a frame body including: a first holding wall and a second holding wall; and a bottom wall; an intermediate block, and a cell retainer, wherein at least one of the first holding wall or the second holding wall has one of a first groove or a first protrusion to be elastically fitted into the first groove, which is configured to support the intermediate block on a lateral side, and wherein the intermediate block has another one of the first groove or the first protrusion.

Abstract: The present disclosure includes a system for use in the treatment of cancer, the system comprising an extracorporeal circulation device comprising a blood circuit and a blood pump to collect and return blood of a subject, and a light irradiation device to irradiate the blood circuit with light, wherein a photosensitive substance is administered to the subject prior to blood collection, or added to blood collected from the subject prior to light irradiation, the blood collected from the subject and irradiated with light is returned to the subject, and the light has an irradiation energy density of 2.5 to 300 J/cm2.

Abstract: An optical measurement system capable of suppressing noise and realizing more accurate measurement is provided. The optical measurement system includes a light source, an image sensor, and an optical system including a beam splitter that divides light from the light source into first light and second light. The optical system can configure a first optical system that records with the image sensor, a first hologram resulting from modulation of first light with second light while there is no sample, the second light being diverging light, and a second optical system that records with the image sensor, a second hologram resulting from modulation with second light, of light obtained by illumination of a sample with first light. The second optical system includes a restriction mechanism that restricts spread of the light obtained by illumination of the sample with first light to be kept within a predetermined range.

Abstract: An optical measurement system includes a light source, a spectroscopic detector, a reference sample, a switching mechanism that switches between a first optical path through which a sample to be measured is irradiated with light from the light source and light produced at the sample is guided to the spectroscopic detector and a second optical path through which the reference sample is irradiated with light from the light source and light produced at the reference sample is guided to the spectroscopic detector, and a processing unit that calculates, by performing correction processing based on change between a first detection result at first time and a second detection result at second time, a measurement value of the sample from a third detection result provided from the spectroscopic detector as a result of irradiation of the sample with light from the light source at third time temporally proximate to the second time.

Abstract: The photodynamic therapy device of the present disclosure is a photodynamic therapy device that irradiates light from a light source onto blood that has been taken out of a patient's body and is flowing in the blood tube, the blood having absorbed a photoreactive agent, to destroy an undesirable component in the blood or affect the component. The photodynamic therapy device includes the irradiation unit that includes a light source and irradiates the blood in the blood tube with light, and the circuit cooling block that cools the blood in the blood tube. The circuit cooling block is connected to the pump that circulates cooling water in the circuit cooling block, the reservoir tank, and the cooling unit that cools water by the water flow path for flowing the cooling water.

Abstract: Provided are a particle size measurement method, a particle size measurement apparatus, and a particle size measurement program in which a needless measurement time period is omitted by setting an appropriate measurement time period in accordance with a particle size to be measured. The particle size measurement method includes: a test measurement step; an autocorrelation function calculation step; a setting step of setting a part of a plurality of measurement timings set in advance as measurement timings to be used for main measurement, based on a time period required until an autocorrelation function falls below a predetermined threshold value and a preliminary time period set and added to the time period; a main measurement step of measuring a main measurement intensity of scattered light during a main measurement time period; and a particle size calculation step of calculating a particle size of a sample.

Abstract: An optical measurement system includes a light source, a spectroscopic detector, a reference sample, a switching mechanism that switches between a first optical path through which a sample to be measured is irradiated with light from the light source and light produced at the sample is guided to the spectroscopic detector and a second optical path through which the reference sample is irradiated with light from the light source and light produced at the reference sample is guided to the spectroscopic detector, and a processing unit that calculates, by performing correction processing based on change between a first detection result at first time and a second detection result at second time, a measurement value of the sample from a third detection result provided from the spectroscopic detector as a result of irradiation of the sample with light from the light source at third time temporally proximate to the second time.

Abstract: A measurement device is a measurement device for measuring the shape of a measurement subject, and includes: a light source unit; a light receiving unit; and a main body that includes a light passing portion from which a line-shaped light ray is emitted, a light projection optical path that is an optical path extending from the light source unit to the light passing portion, and a light receiving optical path that is an optical path extending from the light passing portion to the light receiving unit.

Abstract: A photodynamic therapy device of this disclosure includes: a light emitting unit (112, 112) including light sources (110) each belonging to any one of groups; a photodetector (120X, 120Y) configured to output an electrical signal corresponding to an amount of light received from the light sources (110); a light emission control unit (160) configured to sequentially cause the light sources (110) to emit light for each group; and a computing unit (151) configured to calculate, based on a distance coefficient related to a distance between the photodetector (120X, 120Y) and the light sources (110) belonging to the each group, and on a value of the electrical signal output by the photodetector (120X, 120Y) in accordance with light emitted from the light sources belonging to the corresponding group, a group light amount value related to a light amount of the light sources belonging to the each group.

Abstract: Provided is a photodynamic therapy device that enables efficient light irradiation of blood of a patient. A photodynamic therapy device (100) of this disclosure includes a cartridge (10) including a winding core and a tube arranged so as to be wound around the winding core, a casing (50) configured to accommodate the cartridge (10), and a light source (60), which is arranged inside the casing (50), and is configured to irradiate the tube with light. The tube arranged around the winding core has a cross section taken along a direction orthogonal to an extending direction of the tube, which has a first dimension in a first direction and a second dimension in a second direction orthogonal to the first direction. The second dimension is smaller than the first dimension. The second direction is directed outward with respect to the winding core.

Abstract: A film thickness measuring apparatus including: a measurement light path for irradiating a measurement target object with light from a light source; a correction light path for irradiating a reference member with light from the light source; and a light switching unit that selectively guides reflected light from the measurement target object or reflected light from the reference member, to a spectroscope.

Abstract: An optical measurement apparatus including: an irradiation optical system configured to irradiate, in a straight direction, a target area that includes a measurement area and a non-measurement area that is an area different from the measurement area, with irradiation light that includes a plurality of wavelengths; a reception optical system configured to receive measurement light that is transmission light or reflection light travelling from the target area as a result of the target area being irradiated with the irradiation light; and a calculation unit configured to generate a reception light spectrum that indicates a relationship between a wavelength and an intensity of the measurement light, for each position in the target area, based on a result of reception of the measurement light performed by the reception optical system, and calculate, for each wavelength, a transmittance or a reflectance of a measurement subject that is placed on the measurement area, based on the reception light spectrum thus gener

Abstract: An optical measurement apparatus including: an irradiation optical system configured to irradiate a measurement subject with irradiation light that includes a plurality of wavelengths; a reception optical system configured to receive measurement light that is transmission light or reflection light travelling from the measurement subject as a result of the measurement subject being irradiated with the irradiation light; and a polarizing plate, wherein the polarizing plate is configured to be able to be provided in either the irradiation optical system or the reception optical system.

Abstract: A film thickness measuring apparatus including: a measurement light path for irradiating a measurement target object with light from a light source; a correction light path for irradiating a reference member with light from the light source; and a light switching unit that selectively guides reflected light from the measurement target object or reflected light from the reference member, to a spectroscope.

Abstract: To provide a luminous body measurement apparatus capable of being easily downsized, with which luminance of a luminous body can be measured in a wide range on a measurement sphere. The luminous body measurement apparatus is configured to pivot a first arm and a second arm in a non-inverted posture to obtain luminance data of a sample at a plurality of image pickup positions in a first region of the measurement sphere, and is configured to pivot the first arm and the second arm in an inverted posture to obtain luminance data of the sample at a plurality of image pickup positions in a second region adjacent to the first region, the non-inverted posture being a posture under which a supporting portion is located on one side of an axis as viewed from a holding portion, the inverted posture being a posture under which the supporting portion is located on another side of the axis as viewed from the holding portion.

Abstract: An optical measurement apparatus including: an irradiation optical system configured to irradiate, in a straight direction, a target area that includes a measurement area and a non-measurement area that is an area different from the measurement area, with irradiation light that includes a plurality of wavelengths; a reception optical system configured to receive measurement light that is transmission light or reflection light travelling from the target area as a result of the target area being irradiated with the irradiation light; and a calculation unit configured to generate a reception light spectrum that indicates a relationship between a wavelength and an intensity of the measurement light, for each position in the target area, based on a result of reception of the measurement light performed by the reception optical system, and calculate, for each wavelength, a transmittance or a reflectance of a measurement subject that is placed on the measurement area, based on the reception light spectrum thus gener