Living-body component measuring apparatus
First Claim
1. A living-body component measuring apparatus that measures a component of an inner tissue of a living body serving as an object to be measured, the living-body component measuring apparatus comprising:
- a light source emitting laser light having two or more wavelengths;
a beam splitter that changes optical paths of a part of the laser light emitted from the light source and a reflected light of the laser light from the inner tissue of the living body;
a reference-light measuring unit that measures, as reference light, the part of the laser light emitted from the light source and having the optical path changed by the beam splitter into a first direction;
a reflected-light measuring unit that measures the reflected light reflected by the inner tissue of the living body and having the optical path changed by the beam splitter into a second direction different from the first direction;
an analysis unit that analyzes the inner tissue of the living body by measuring a spectrum of the reflected light and the reference light;
an optical fiber that is configured to apply the laser light emitted from the light source onto a surface of the living body;
a second light receiving element that detects reflected light of the laser light applied by the optical fiber in a third direction different from the first and second directions, the reflected light being reflected by the surface of the living body; and
a light-source driving circuit that drives the light source on the basis of a detection signal from the second light receiving element so that an intensity of the laser light emitted from the light source is kept at a predetermined value.
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Accused Products
Abstract
A living-body component measuring apparatus measures a component of an inner tissue of a living body serving as an object to be measured by emitting laser light having two or more wavelengths from a light source and measuring reflected light of the laser light from the inner tissue of the living body. The living-body component measuring apparatus includes a beam splitter that changes optical paths of a part of the laser light and the reflected light, a reference-light measuring unit that measures, as reference light, the part of the laser light having the optical path changed by the beam splitter, a reflected-light measuring unit that measures the reflected light having the optical path changed by the beam splitter, and an analysis unit that analyzes the inner tissue by measuring a spectrum of the reflected light or the reference light.
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Citations
15 Claims
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1. A living-body component measuring apparatus that measures a component of an inner tissue of a living body serving as an object to be measured, the living-body component measuring apparatus comprising:
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a light source emitting laser light having two or more wavelengths; a beam splitter that changes optical paths of a part of the laser light emitted from the light source and a reflected light of the laser light from the inner tissue of the living body; a reference-light measuring unit that measures, as reference light, the part of the laser light emitted from the light source and having the optical path changed by the beam splitter into a first direction; a reflected-light measuring unit that measures the reflected light reflected by the inner tissue of the living body and having the optical path changed by the beam splitter into a second direction different from the first direction; an analysis unit that analyzes the inner tissue of the living body by measuring a spectrum of the reflected light and the reference light; an optical fiber that is configured to apply the laser light emitted from the light source onto a surface of the living body; a second light receiving element that detects reflected light of the laser light applied by the optical fiber in a third direction different from the first and second directions, the reflected light being reflected by the surface of the living body; and a light-source driving circuit that drives the light source on the basis of a detection signal from the second light receiving element so that an intensity of the laser light emitted from the light source is kept at a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A living-body component measuring apparatus that measures a component of an inner tissue of a living body serving as an object to be measured, the living-body component measuring apparatus comprising:
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a light source emitting laser light having two or more wavelengths; a branching unit that branches the laser light emitted from the light source; a reference-light measuring unit that measures, as reference light, one part of the laser light branched by the branching unit into a first direction; a reflected-light measuring unit that measures the other part of the laser light branched by the branching unit into a second direction different from the first direction and serving as a reflected light of the laser light from the inner tissue of the living body; an analysis unit that analyzes the inner tissue of the living body by measuring a spectrum of the reflected light and the reference light serving as the part of the laser light branched by the branching unit; an optical fiber that is configured to apply the laser light emitted from the light source onto a surface of the living body; a second light receiving element that detects reflected light of the laser light applied by the optical fiber in a third direction different from the first and second directions, the reflected light being reflected by the surface of the living body; and a light-source driving circuit that drives the light source on the basis of a detection signal from the second light receiving element so that an intensity of the laser light emitted from the light source is kept at a predetermined value.
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15. A living-body component measuring apparatus that measures a component of an inner tissue of a living body serving as an object to be, the living-body component measuring apparatus comprising:
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a light source emitting laser light having two or more wavelengths; a first beam splitter that transmits one part of the laser light emitted from the light source in a first direction and changes an optical path of the other part of the laser light into a second direction different from the first direction; a second beam splitter that changes an optical path of the part of the laser light incident through the first beam splitter in the first direction, transmits the other part of the laser light in the first direction, and changes an optical path of a reflected light of the laser light from the inner tissue of the living body into a third direction different from the first direction; a reference-light measuring unit that measures, as reference light, the other part of the laser light having the optical path changed by the first beam splitter in the second direction towards the reference-light measuring unit; a reflected-light measuring unit that measures the reflected light reflected by the inner tissue of the living body and having the optical path changed by the second beam splitter in the third direction towards the reflected-light measuring unit; an analysis unit that analyzes the inner tissue of the living body by measuring a spectrum of the reflected light and the reference light having the optical path changed by the first beam splitter; an optical fiber that is configured to apply the laser light emitted from the light source onto a surface of the living body; a second light receiving element that detects reflected light of the laser light applied by the optical fiber in a fourth direction different from the first, second and third directions, the reflected light being reflected by the surface of the living body; and a light-source driving circuit that drives the light source on the basis of a detection signal from the second light receiving element so that an intensity of the laser light emitted from the light source is kept at a predetermined value.
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Specification