Polarized optical coherence imaging in turbid media by use of a Zeeman laser.
A method that uses a Zeeman laser in conjunction with a Glan-Thompson analyzer to image an object in a turbid medium is proposed. A heterodyne signal is generated only when the scattering photons are partially polarized, and the spatial coherence is not seriously degraded after the signal propagates in the turbid medium. A system combining polarization discrimination with optical coherence detection to image the object in a scattering medium is successfully demonstrated. The medium is a solution of polystyrene microspheres measuring 1.072 mum in diameter suspended in distilled water contained in a 10-mm-thick quartz cuvette. The advantages of this optical system, including better selectivity of the weak partially polarized scattering photons and better imaging ability in higher-scattering media, are discussed.
Chou
C
C
Institute of Radiological Sciences & Department of Medical Radiation Technology, National Yang-Ming University, Taipei, Taiwan 112, China.
Peng
L C
LC
Chou
Y H
YH
Tang
Y H
YH
Han
C Y
CY
Lyu
C W
CW