US 12,203,845 B2
Optical imaging system and method based on random light field spatial structure engineering
Yahong Chen, Suzhou (CN); Deming Peng, Suzhou (CN); Yonglei Liu, Suzhou (CN); Fei Wang, Suzhou (CN); and Yangjian Cai, Suzhou (CN)
Assigned to SOOCHOW UNIVERSITY, Suzhou (CN)
Appl. No. 17/797,685
Filed by SOOCHOW UNIVERSITY, Suzhou (CN)
PCT Filed Jun. 21, 2021, PCT No. PCT/CN2021/101132
§ 371(c)(1), (2) Date Aug. 4, 2022,
PCT Pub. No. WO2022/257174, PCT Pub. Date Dec. 15, 2022.
Claims priority of application No. 202110629377.3 (CN), filed on Jun. 7, 2021.
Prior Publication US 2023/0314309 A1, Oct. 5, 2023
Int. Cl. G01N 21/21 (2006.01); G01B 11/00 (2006.01); G01B 11/24 (2006.01); G01N 21/47 (2006.01); G02B 27/00 (2006.01); G02B 27/28 (2006.01); G02B 30/10 (2020.01)
CPC G01N 21/21 (2013.01) [G01N 21/4795 (2013.01); G02B 27/00 (2013.01); G02B 27/283 (2013.01); G02B 30/10 (2020.01); G01B 11/00 (2013.01); G01B 11/24 (2013.01); G01N 2021/479 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An optical imaging system based on random light field spatial structure engineering, comprising:
a scattering assembly configured to scatter a beam transmitted through free space via a scattering medium to obtain light to be measured, the beam carrying information on an object to be measured;
a first beam polarization splitting assembly configured to split the polarization of the light to be measured, in which one light beam to be measured is split into x-polarized light and y-polarized light and the other light beam to be measured is combined with a reference light beam and then split into x-polarized light and y-polarized light, where the reference light is completely coherent with the light to be measured;
an optical measurement assembly configured to measure intensity distribution of the x-polarized and y-polarized parts of the light to be measured, intensity distribution of the x-polarized and y-polarized parts of the light after beam combination of the reference light and the light to be measured and intensity distribution of x-polarized and y-polarized parts of the reference light which has not been combined with the other light beam to be measured; and
a calculation unit configured to obtain a real part and an imaginary part of the cross spectral density of the light to be measured according to the intensity distributions, retrieve the intensity distribution of light on the scattering medium by using the real part and the imaginary part of the cross spectral density and calculate the intensity distribution on the scattering medium to obtain the shape and location of the object to be measured.