Optical measuring device

An optical measuring device comprising:

• a light emitting component comprising a light source configured to emit each of two different wavelengths of light, wherein the light emitting component is disposed within the optical measuring device to emit light onto a human body when the light emitting component is placed adjacent to the human body;
• one or more processors;
• a program memory coupled to the one or more processors and storing executable instructions that, when executed by the one or more processors, cause the optical measuring device to:
• implement an acquisition unit that acquires a thickness of a skin and fat layer of the human body;
• implement a first computation unit that computes a first specific distance corresponding to the acquired thickness of the skin and fat layer based on a predetermined relationship between the thickness of the skin and fat layer, the first specific distance, and a measurement sensitivity of the skin and a measurement sensitivity of a uterine muscle layer of the human body when light from the light emitting component is received at a position the first specific distance away from the light source;
• and
• implement a second computation unit that computes a second specific distance corresponding to the acquired thickness of the skin and fat layer based on a predetermined relationship between the thickness of the skin and fat layer, the second specific distance, and a measurement sensitivity of the skin and fat layer and a measurement sensitivity of the uterine muscle layer when light from the light emitting components is received at a position the second specific distance away from the light source;
• a light reception component comprising a plurality of photodetectors positioned at a plurality of distances from the light source, the light reception component configured to:
• receive light at the position the computed first specific distance away from the light source out of the light emitted from the light source, wherein the light has at least passed through the skin and fat layer,
• receive light at a different position from the first specific distance away position out of the light emitted from the light source, wherein the light has at least passed through the skin and fat layer,
• receive light at the position the computed second specific distance away from the light source out of the light emitted from the light source, wherein the light has at least passed through the skin and fat layer and the uterine muscle layer, and
• receive light at a different position from the second specific distance away position out of the light emitted from the light source, wherein the light has at least passed through the skin and fat layer and the uterine muscle layer;
• wherein the program memory further stores executable instructions that, when executed by the one or more processors, cause the optical measuring device to:
• implement a spatial slope computation unit that, for each of the two wavelengths, computes a first spatial slope based on light intensities of light respectively received at the first specific distance away position and at the different position from the first specific distance away position, and that computes a second spatial slope based on light intensities of light respectively received at the second specific distance away position and at the different position from the second specific distance away position;
• and
• implement an absorption computation unit that for each of the two wavelengths, computes a light absorbance in the uterine muscle layer based on the computed first spatial slope, the computed second spatial slope, and a thickness of the skin and fat layer, and that, based on the light absorbance in the uterine muscle layer for each of the two wavelengths, computes a concentration of at least one of oxygenated hemoglobin or deoxygenated hemoglobin of the uterine muscle;
• and
• an output component configured to receive and present one or more of the computed concentration of the at least one of the oxygenated hemoglobin or deoxygenated hemoglobin of the uterine muscle.