US 12,467,786 B2
Measurement device, synthesized light applying method, optical measuring method, service providing system, and service providing method
Yuki Endo, Machida (JP); Hideo Ando, Machida (JP); and Satoshi Hayata, Machida (JP)
Assigned to JAPAN CELL CO., LTD., Tokyo (JP)
Filed by Japan Cell Co., Ltd., Machida (JP)
Filed on Jun. 27, 2023, as Appl. No. 18/341,902.
Application 18/341,902 is a continuation of application No. PCT/JP2022/001156, filed on Jan. 14, 2022.
Claims priority of application No. PCT/JP2021/006685 (WO), filed on Feb. 22, 2021.
Prior Publication US 2023/0341263 A1, Oct. 26, 2023
Int. Cl. G01J 3/10 (2006.01); G01N 21/27 (2006.01); G01N 21/41 (2006.01); G01J 3/02 (2006.01); G01N 21/64 (2006.01)
CPC G01J 3/10 (2013.01) [G01N 21/27 (2013.01); G01N 21/41 (2013.01); G01J 3/0218 (2013.01); G01N 21/64 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A measurement device, comprising:
a light modulation controller which uses a modulation signal;
a light source including a modulation light emitter, an optical characteristic converter, and an optical synthesizer,
wherein:
the modulation light emitter emits initial modulation light,
the optical characteristic converter divides the initial modulation light into a first light beam and a second light beam,
the optical characteristic converter makes an optical path length difference between the first light beam and the second light beam larger than a coherence length,
the optical synthesizer synthesizes the first light beam and the second light beam having the optical path length difference larger than the coherence length to form synthesized modulation light,
the light source irradiates the synthesized modulation light to a measured object, and
light intensity of the synthesized modulation light changes according to the modulation signal;
the measurement device further comprising:
a measurer receiving the synthesized modulation light obtained from the measured object to generate a time-dependent signal; and
a signal receptor collecting the time-dependent signal,
wherein:
the time-dependent signal is synchronized with the modulation signal, and
the modulation signal has a timing shift compared with the collection timing of the time-dependent signal in the signal receptor.