US 11,747,281 B2
Spectroscopic apparatus and spectroscopic method using time resolved coding
Won Kyoung Lee, Daejeon (KR); and Hong-Seok Seo, Daejeon (KR)
Assigned to Electronics and Telecommunications Research Institute, Daejeon (KR)
Appl. No. 17/618,205
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
PCT Filed Jul. 14, 2020, PCT No. PCT/KR2020/009244
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2021/085801, PCT Pub. Date May 6, 2021.
Claims priority of application No. 10-2019-0135817 (KR), filed on Oct. 29, 2019.
Prior Publication US 2022/0163452 A1, May 26, 2022
Int. Cl. G01N 21/65 (2006.01); G01N 33/483 (2006.01)
CPC G01N 21/65 (2013.01) [G01N 33/483 (2013.01); G01N 2201/06113 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A spectroscopic apparatus comprising:
a laser irradiation device configured to receive an orthogonal code including a series of bits each having a first value or a second value, to generate a control signal having a pulse that has a width shorter than a width of a bit section in the bit section corresponding to a bit having the first value among the series of bits, to generate a pulsed laser beam having a pulse width shorter than the bit section using the pulse included in the control signal as a trigger, and to irradiate an incident beam including the generated pulsed laser beam to a sample; and
a detector configured to receive a detection signal generated from the sample to which the incident beam is irradiated and the orthogonal code, to generate an orthogonal code signal of the same waveform as that of the incident beam, based on the orthogonal code, and to demodulate a Raman signal, based on a correlation between the generated orthogonal code signal and the Raman signal included in the detection signal.