US 12,144,619 B2
Blood measurement device
Hitoshi Ogura, Ota (JP); Koichi Takezawa, Ota (JP); and Takayuki Asao, Maebashi (JP)
Assigned to LOOK TEC CO., LTD, Ota (JP); and NATIONAL UNIVERSITY CORPORATION GUNMA UNIVERSITY, Maebashi (JP)
Appl. No. 17/928,605
Filed by LOOK TEC CO., LTD., Ota (JP); and NATIONAL UNIVERSITY CORPORATION GUNMA UNIVERSITY, Maebashi (JP)
PCT Filed Jun. 4, 2021, PCT No. PCT/JP2021/021421
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2022/009577, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 2020-116443 (JP), filed on Jul. 6, 2020; and application No. 2020-116444 (JP), filed on Jul. 6, 2020.
Prior Publication US 2023/0270359 A1, Aug. 31, 2023
Int. Cl. A61B 5/1455 (2006.01); A61B 5/145 (2006.01)
CPC A61B 5/1455 (2013.01) [A61B 5/14532 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A blood measurement device that measures a component contained in blood based on a light beam that has transmitted through or been reflected by a measurement site, the blood measurement device comprising:
a light emitting part that emits the light beam that is to transmit through or be reflected by the measurement site;
a light receiving part that receives the light beam that has transmitted through or been reflected by the measurement site;
an integrating sphere part interposed in an optical path along which the light beam emitted from the light emitting part reaches the light receiving part, the integrating sphere part having formed inside a reflection surface that reflects the light beam;
a light entry part which is an opening provided at the integrating sphere part and through which the light beam applied from the light emitting part enters an inside of the integrating sphere part;
a light exit part which is an opening provided at the integrating sphere part and through which the light beam reflected by the reflection surface of the integrating sphere part is emitted from the integrating sphere part toward the measurement site;
a light monitor opening part which is an opening provided at the integrating sphere part and through which part of the light beam entering the integrating sphere part through the light entry part and getting reflected by the reflection surface is emitted to an outside;
a monitor light receiving part that receives the light beam emitted through the light monitor opening part; and
a computation and control part that controls intensity of the light beam emitted from the light emitting part based on an output from the monitor light receiving part.