US 12,232,855 B2
Measurement device and measurement method
Yoshihiro Wakita, Tokyo (JP); Kota Aizawa, Tokyo (JP); and Takahiro Igarashi, Kanagawa (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Appl. No. 17/906,354
Filed by SONY GROUP CORPORATION, Tokyo (JP)
PCT Filed Mar. 11, 2021, PCT No. PCT/JP2021/009819
§ 371(c)(1), (2) Date Sep. 15, 2022,
PCT Pub. No. WO2021/193110, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-053785 (JP), filed on Mar. 25, 2020.
Prior Publication US 2023/0035537 A1, Feb. 2, 2023
Int. Cl. A61B 5/026 (2006.01); A61B 5/00 (2006.01)
CPC A61B 5/0261 (2013.01) [A61B 5/7225 (2013.01); A61B 2560/0209 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A measurement device, comprising:
a light source configured to:
intermittently emit light with a driving current with which light emission efficiency improves as compared with constant light emission; and
irradiate a subject with the light;
a drive control unit configured to intermittently drive the light source;
a light receiving element configured to:
receive scattered light of the light from the subject; and
generate a first generates an electric signal based on the received scattered light; and
an amplifier configured to amplify the first electric signal with an integration circuit.