Single-shot retinal imaging with AO spectral OCT

Yan Zhang; Jungtae Rha; Ravi S Jonnal; Donald T Miller

doi:10.1117/12.592831

13 April 2005 Single-shot retinal imaging with AO spectral OCT

Yan Zhang, Jungtae Rha, Ravi S Jonnal, Donald T Miller

Author Affiliations +

Proceedings Volume 5690, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine IX; (2005) https://doi.org/10.1117/12.592831
Event: SPIE BiOS, 2005, San Jose, CA, United States

Abstract

We demonstrate for the first time an adaptive optics (AO) spectral OCT retina camera that acquires with unprecedented 3D resolution (2.9 μm lateral; 5.5 μm axial) single shot B-scans of the living human retina. The camera centers on a Michelson interferometer that consists of a superluminescent diode for line illuminating the subject's retinal; voice coil translator for controlling the optical path length of the reference channel; and an imaging spectrometer that is cascaded with a 12-bit area CCD array. The imaging spectrometer was designed with negligible off-axis aberrations and was constructed from stock optical components. AO was integrated into the detector channel of the interferometer and dynamically compensated for most of the ocular aberration across a 6 mm pupil. Short bursts of B-scans, with 100 Ascans each, were successfully acquired at 1 msec intervals. Camera sensitivity was found sufficient to detect reflections from all major retinal layers. Individual outer segments of photoreceptors at different retinal eccentricities were observed in vivo. Periodicity of the outer segments matched cone spacing as measured from AO flood illuminated images of the same patches of retina.

Citation Download Citation

Yan Zhang, Jungtae Rha, Ravi S Jonnal, and Donald T Miller "Single-shot retinal imaging with AO spectral OCT", Proc. SPIE 5690, Coherence Domain Optical Methods and Optical Coherence Tomography in Biomedicine IX, (13 April 2005); https://doi.org/10.1117/12.592831

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