High speed parallel spectral-domain OCT using spectrally encoded line-field illumination

We report parallel spectral-domain optical coherence tomography (OCT) at 500 000 A-scan/s. This is the highest-speed spectral-domain (SD) OCT system using a single line camera. Spectrally encoded line-field scanning is proposed to increase the imaging speed in SD-OCT effectively, and the tradeoff be...

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Bibliographic Details
Published in:Applied physics letters 2018-01, Vol.112 (4)
Main Authors: Lee, Kye-Sung, Hur, Hwan, Bae, Ji Yong, Kim, I Jong, Kim, Dong Uk, Nam, Ki-Hwan, Kim, Geon-Hee, Chang, Ki Soo
Format: Article
Language:English
Subjects:
Applied physics
Coding
Dependence
Gaussian beams (optics)
Line spectra
Medical imaging
Optical Coherence Tomography
Sensitivity
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Summary:We report parallel spectral-domain optical coherence tomography (OCT) at 500 000 A-scan/s. This is the highest-speed spectral-domain (SD) OCT system using a single line camera. Spectrally encoded line-field scanning is proposed to increase the imaging speed in SD-OCT effectively, and the tradeoff between speed, depth range, and sensitivity is demonstrated. We show that three imaging modes of 125k, 250k, and 500k A-scan/s can be simply switched according to the sample to be imaged considering the depth range and sensitivity. To demonstrate the biological imaging performance of the high-speed imaging modes of the spectrally encoded line-field OCT system, human skin and a whole leaf were imaged at the speed of 250k and 500k A-scan/s, respectively. In addition, there is no sensitivity dependence in the B-scan direction, which is implicit in line-field parallel OCT using line focusing of a Gaussian beam with a cylindrical lens.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5017078