Spectrally encoded extended source optical coherence tomography

Xinyu Liu, Xiaojun Yu, Hongying Tang, Dongyao Cui, Meghna R. Beotra, Michael J. A. Girard, Ding Sun, Jun Gu, Linbo Liu
2014 Optics Letters  
We have developed an extended source optical coherence tomography (SEES-OCT) technique in an attempt to improve signal strength for ophthalmic imaging. A line illumination with a visual angle of 7.9 mrad is produced by introducing a dispersive element in the infinity space of the sample arm. The maximum permissible exposure (MPE) of such an extended source is 3.1 times larger than that of a "standard" point source OCT, which corresponds to sensitivity improvement of 5 dB. The advantage of
more » ... CT in providing superior penetration depth over a point source system is demonstrated using swine eye tissues ex vivo.
doi:10.1364/ol.39.006803 pmid:25503001 fatcat:5sw4wtym3jeczmskdd6y4ys7ju