Abstract: A biometric information measuring apparatus includes: a notification unit that notifies a subject holding breath to resume breathing when a specified time to hold breath is reached; and a measuring unit that measures an oxygen circulation time representing a time required for oxygen taken into a body of the subject by resumption of breathing by the subject to reach a predetermined site.

Abstract: An optical measuring instrument 1 is equipped with an optical system 20 to be used for measuring a characteristic of the aqueous humor in the anterior chamber 13 of an eyeball 10 of a measurement subject person and a holding unit 50 which holds the optical system 20 etc. The optical system 20 is equipped with a light emitting system 20A and a photodetecting system 20B. An optical path 28 is set so that light emitted from the light emitting system 20A passes through (traverses) the anterior chamber 13 and is detected by the photodetecting system 20B in a state that the eyeball 10 is turned outward.

Abstract: An optical measurement apparatus includes: an emission section that emits light such that the light travels across an anterior chamber of an eyeball of a measurement subject; a light reception section that receives light that is emitted from the emission section and travels across the anterior chamber; and a positioning section that performs positioning of one of the emission section and the light reception section at a position where skin on a periphery of an inner canthus of the eyeball is squeezed into an eye socket accommodating the eyeball.

Abstract: A concentration calculation system calculates a concentration of the optically active substance based on a formula. The formula includes a first function representing wavelength dependence of an optical rotation of a first optically-active substance, and a second function representing wavelength dependence of an optical rotation of a second optically-active substance. In the first function, concentration of the first optically-active substance has an unknown value, and an inherent value for defining a characteristic of optical rotatory dispersion of the first optically-active substance is a known value or an unknown value within a certain limited range. In the second function, an inherent value for defining a characteristic of optical rotatory dispersion of the second optically-active substance is an unknown value.

Abstract: An optical measurement apparatus for an eyeball, the optical measurement apparatus includes: a light reflecting unit that reflects light in a direction where the light passes across an anterior chamber of the eyeball; and a switching unit that switches an incident position of the light to the light reflecting unit so as to inhibit the light from being moved from a state in which the light passes across the anterior chamber.

Abstract: An optical measurement apparatus includes: an emission section that emits light such that the light travels across an anterior chamber of an eyeball of a measurement subject; a light reception section that receives light that is emitted from the emission section and travels across the anterior chamber; and a positioning section that performs positioning of one of the emission section and the light reception section at a position where skin on a periphery of an inner canthus of the eyeball is squeezed into an eye socket accommodating the eyeball.

Abstract: A measurement apparatus includes: an eyelid opening section that comes into contact with skin on a periphery of an eyeball of a measurement subject and maintains an eyelid of the measurement subject in an open state; an emission section that emits light such that the light travels across an anterior chamber of the eyeball in which the eyelid is maintained in an open state by the eyelid opening portion; and a light reception section that receives the light which travels across the anterior chamber.

Abstract: An optical measurement apparatus for an eyeball, including: a light irradiation section that is disposed on an inner canthus side of the eyeball and that includes a light source, a polarization portion that performs polarization control of light from the light source, and a light reflection portion that is disposed closer to an inward side of an eyeball than the polarization portion is and that reflects light subjected to the polarization control by the polarization portion such that the light travels across an anterior chamber of the eyeball; and a light reception section that is disposed on an outer canthus side of the eyeball, that receives the light traveling across the anterior chamber without further going through a light reflection portion that changes a polarization state of light, and that detects a change of the polarization state of the received light.

Abstract: An optical measurement apparatus for an eyeball includes a light emission section that emits light to travel across an anterior chamber inside an eyeball of a measurement subject, a light reception section that receives light traveling across the anterior chamber, a holding member that holds the light emission section and the light reception section, and an adjustment section that is provided in the holding member and switches an angle of the light emitted from the light emission section toward the anterior chamber to adjust the angle of the light to an angle at which the light travels across the anterior chamber and received by the light reception section.

Abstract: A concentration calculation system of an optically active substance, includes: a calculation unit configured to: acquire an amount of change in a polarization state by allowing light having different wavelengths to pass through a cornea and an aqueous humor; and calculate a concentration of a specific optically active substance contained in the aqueous humor by a least squares method based on a theoretical formula which includes a matrix representing a polarization property of the cornea and a matrix representing a polarization property of the aqueous humor and represents a wavelength dependence of the amount of the change, wherein the matrix representing the polarization property of the aqueous humor is represented by a function of an expression representing the wavelength dependence of an optical rotation degree of the specific substance and the expression includes a concentration value of the specific substance as an unknown quantity or a temporal known quantity.

Abstract: An optical measuring instrument 1 is equipped with an optical system 20 to be used for measuring a characteristic of the aqueous humor in the anterior chamber 13 of an eyeball 10 of a measurement subject person and a holding unit 50 which holds the optical system 20 etc. The optical system 20 is equipped with a light emitting system 20A and a photodetecting system 20B. An optical path 28 is set so that light emitted from the light emitting system 20A passes through (traverses) the anterior chamber 13 and is detected by the photodetecting system 20B in a state that the eyeball 10 is turned outward.

Abstract: A concentration calculation system calculates a concentration of the optically active substance based on a formula. The formula includes a first function representing wavelength dependence of an optical rotation of a first optically-active substance, and a second function representing wavelength dependence of an optical rotation of a second optically-active substance. In the first function, concentration of the first optically-active substance has an unknown value, and an inherent value for defining a characteristic of optical rotatory dispersion of the first optically-active substance is a known value or an unknown value within a certain limited range. In the second function, an inherent value for defining a characteristic of optical rotatory dispersion of the second optically-active substance is an unknown value.

Abstract: An image forming apparatus includes an image forming device forming an image on a recording medium; and a light source that, after the image has been formed by the image forming device, irradiates the recording medium with light to fix the image on the recording medium, while the recording medium moves relatively in a predetermined movement direction. The light source includes a current supply section, a light emitting section, and a current output section. Current for light emission is supplied to the current supply section. The light emitting section includes light emitting elements that are disposed two-dimensionally. At least the light emitting elements provided side by side in the movement direction are electrically connected in parallel. The current output section outputs the current that has passed through the light emitting section. The current supply section and the light emitting section are provided side by side in the movement direction.

Abstract: An image forming apparatus includes an image forming device forming an image on a recording medium; and a light source that, after the image has been formed by the image forming device, irradiates the recording medium with light to fix the image on the recording medium, while the recording medium moves relatively in a predetermined movement direction. The light source includes a current supply section, a light emitting section, and a current output section. Current for light emission is supplied to the current supply section. The light emitting section includes light emitting elements that are disposed two-dimensionally. At least the light emitting elements provided side by side in the movement direction are electrically connected in parallel. The current output section outputs the current that has passed through the light emitting section. The current supply section and the light emitting section are provided side by side in the movement direction.