US 12,326,366 B2
Linear array scanning brillouin scattering elastic imaging device
Jiulin Shi, Nanchang (CN); Jin Xu, Nanchang (CN); Tianchi Sun, Nanchang (CN); Liangya Cui, Nanchang (CN); Xin Lan, Nanchang (CN); Mingxuan Liu, Nanchang (CN); and Xingdao He, Nanchang (CN)
Assigned to Nanchang Hangkong University, Nanchang (CN)
Filed by Nanchang Hangkong University, Jiangxi (CN)
Filed on Jun. 27, 2023, as Appl. No. 18/214,974.
Claims priority of application No. 202210923388.7 (CN), filed on Aug. 2, 2022.
Prior Publication US 2024/0044709 A1, Feb. 8, 2024
Int. Cl. G01J 3/44 (2006.01); G01J 3/02 (2006.01); G01J 3/06 (2006.01); G01J 3/26 (2006.01); G01J 3/28 (2006.01); G01J 3/443 (2006.01); G01J 3/453 (2006.01); G01J 9/02 (2006.01); G01N 21/01 (2006.01); G01N 21/47 (2006.01)
CPC G01J 3/4412 (2013.01) [G01J 3/0208 (2013.01); G01J 3/0224 (2013.01); G01J 3/0229 (2013.01); G01J 3/027 (2013.01); G01J 3/0278 (2013.01); G01J 3/0294 (2013.01); G01J 3/06 (2013.01); G01J 3/26 (2013.01); G01J 3/28 (2013.01); G01J 3/4537 (2013.01); G01N 21/01 (2013.01); G01N 21/47 (2013.01); G01J 3/443 (2013.01); G01J 2009/0257 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A linear array scanning Brillouin scattering elastic imaging device, comprising a signal generating system, a signal receiving system and an eight-channel spectrometer, wherein
the signal generating system consists of a narrow linewidth continuous wave laser, a half-wave plate, a beam expander, a Y-direction scanning galvanometer, a microlens array, a pinhole array filter, a first plano-convex lens, a polarization beam splitter, a quarter-wave plate and a microscope objective; in the signal generating system, a laser beam emitted by the continuous wave laser passes through the half-wave plate, and then is expanded by the beam expander and reflected to the microlens array by the Y-direction scanning galvanometer; after passing through the pinhole array filter and being focused by the first plano-convex lens, the laser beam passes through the polarization beam splitter and the quarter-wave plate, and is incident on the microscope objective to form eight focused beams on a sample;
the signal receiving system consists of the microscope objective, the quarter-wave plate, the polarization beam splitter and an eight-channel optical collimator array; in the signal receiving system, a plurality of backward Brillouin scattering signal beams excited by the eight focused beams at the sample pass through the microscope objective and the quarter-wave plate and are reflected by the polarization beam splitter, and reflected signal beams are focused to the eight-channel optical collimator array by a second plano-convex lens;
each channel of the eight-channel spectrometer consists of an optical collimator, a convex lens, a scanning Fabry-Perot interferometer, a photomultiplier tube and an eight-channel photon collection card; a plurality of backward Brillouin scattering signal beams received by the signal receiving system enter the eight-channel spectrometer, and each beam enters different spectrometer channels according to different longitudinal positions; in each spectrometer channel, collimated signal beams output by the optical collimator are focused into the scanning Fabry-Perot interferometer through the convex lens, and the signal beams after frequency discrimination are detected by the photomultiplier tube; and the detected scattered signals are collected by the eight-channel photon collection card and stored in a computer for processing, and a collected Brillouin spectrum is displayed.