Measurement device, measurement method, program, and recording medium

1. A measurement device comprising:

a light source configured to emit at least one kind of measurement light belonging to a predetermined wavelength band toward a measurement region formed by at least a part of a living body;

a detection unit configured such that a plurality of sensors are arranged regularly in a predetermined disposition and the measurement light emitted from the light source and transmitted through the living body is detected by the plurality of sensors, wherein each sensor of the plurality of sensors comprises a light reception region including a rectilinear light reception region that obtains a measurement of rectilinear light transmitted through the living body and a scattered light reception region that obtains a measurement of scattered light transmitted through the living body, the scattered light reception region being different from the rectilinear light reception region; and

a processor including processing circuitry and a memory device containing instructions that, when executed by the processing circuitry, are configured to analyze rectilinearity of the measurement light in the living body and an optical distance from the light source using a detection result of the measurement light detected by the detection unit.

2. The measurement device according to claim 1 , wherein, in the detection unit, the measurement light transmitted through the living body is detected by the plurality of sensors using a micro lens array in which a plurality of lenses are regularly arranged in a grid shape.

3. The measurement device according to claim 2 ,

wherein detection precision of the measurement light is controlled in accordance with distribution density of the plurality of sensors in the detection unit, and

the instructions are configured to analyze an influence of scattering of the measurement light by an in-vivo component contained in the living body according to intensity of the detected measurement light and a degree of distribution of the measurement light imaged in the plurality of sensors.

4. The measurement device according to claim 3 ,

wherein the instructions are configured to divide the detected measurement light into rectilinear light rectilinearly propagating in the living body and scattered light transmitted through the living body while being scattered, and to calculate a scattering coefficient corresponding to the in-vivo component based on a detection result corresponding to the rectilinear light.

5. The measurement device according to claim 4 ,

wherein the instructions are configured to divide the measurement light in the plurality of sensors into the rectilinear light and the scattered light according to imaging positions of the measurement light in the plurality of sensors.

6. The measurement device according to claim 4 ,

wherein a polarization direction of the measurement light is controlled to a predetermined direction before the measurement light is incident on the living body,

a polarization selection filter that selects one of two mutually orthogonal polarization directions as the polarization direction of the measurement light imaged in each of the plurality of sensors is provided at a previous stage of the plurality of sensors in the detection unit, and

the instructions are configured to divide the measurement light into the rectilinear light and the scattered light according to whether the measurement light is detected in the sensor corresponding to the polarization selection filter.

7. The measurement device according to claim 4 ,

wherein the instructions are configured to calculate a component amount of the in-vivo component based on the calculated scattering coefficient.

8. The measurement device according to claim 3 ,

wherein a wavelength of the measurement light emitted from the light source is controlled according to the in-vivo component of interest.

9. The measurement device according to claim 3 ,

wherein the instructions are configured to perform an analysis process excluding the detection result corresponding to a spot of the living body causing an error in an analysis result of the in-vivo component.

10. The measurement device according to claim 3 ,

wherein the in-vivo component is at least one of melanin, a blood component, and water.

11. A measurement method comprising:

emitting at least one kind of measurement light belonging to a predetermined wavelength band toward a measurement region formed by at least a part of a living body;

detecting the measurement light emitted from a light source and transmitted through the living body by a plurality of sensors arranged regularly in a predetermined disposition, wherein each sensor of the plurality of sensors comprises a light reception region including a rectilinear light reception region that obtains a measurement of rectilinear light transmitted through the living body and a scattered light reception region that obtains a measurement of scattered light transmitted through the living body, the scattered light reception region being different from the rectilinear light reception region; and

analyzing rectilinearity of the measurement light in the living body and an optical distance from the light source using a detection result of the detected measurement light.

12. A non-transitory computer-readable recording medium having instructions recorded thereon, the instructions causing a computer in communication with a measurement module including a light source that emits at least one kind of measurement light belonging to a predetermined wavelength band toward a measurement region formed by at least a part of a living body and a detection unit in which a plurality of sensors are arranged regularly in a predetermined disposition wherein the measurement light emitted from the light source and transmitted through the living body is detected by the plurality of sensors, to execute a method comprising: analyzing rectilinearity of the measurement light in the living body and an optical distance from the light source using a detection result of the measurement light detected by the detection unit, wherein each sensor of the plurality of sensors comprises a light reception region including a rectilinear light reception region that obtains a measurement of rectilinear light transmitted through the living body and a scattered light reception region that obtains a measurement of scattered light transmitted through the living body, the scattered light reception region being different from the rectilinear light reception region.