Adaptive optics assisted Fourier domain OCT with balanced detection

A. Meadway; A. Bradu; M. Hathaway; S. Van der Jeught; R. B. Rosen M.D.; A. Gh. Podoleanu

doi:10.1117/12.874805

11 February 2011 Adaptive optics assisted Fourier domain OCT with balanced detection

A. Meadway, A. Bradu, M. Hathaway, S. Van der Jeught, R. B. Rosen M.D., A. Gh. Podoleanu

Proceedings Volume 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV; 78892H (2011) https://doi.org/10.1117/12.874805
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

Two factors are of importance to optical coherence tomography (OCT), resolution and sensitivity. Adaptive optics improves the resolution of a system by correcting for aberrations causing distortions in the wave-front. Balanced detection has been used in time domain OCT systems by removing excess photon noise, however it has not been used in Fourier domain systems, as the cameras used in the spectrometers saturated before excess photon noise becomes a problem. Advances in camera technology mean that this is no longer the case and balanced detection can now be used to improve the signal to noise ratio in a Fourier domain (FD) OCT system. An FD-OCT system, enhanced with adaptive optics, is presented and is used to show the improvement that balanced detection can provide. The signal to noise ratios of single camera detection and balanced detection are assessed and in-vivo retinal images are acquired to demonstrate better image quality when using balance detection.

Citation Download Citation

A. Meadway, A. Bradu, M. Hathaway, S. Van der Jeught, R. B. Rosen M.D., and A. Gh. Podoleanu "Adaptive optics assisted Fourier domain OCT with balanced detection", Proc. SPIE 7889, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XV, 78892H (11 February 2011); https://doi.org/10.1117/12.874805

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KEYWORDS

Cameras

Signal to noise ratio

Adaptive optics

Optical coherence tomography

Spectrometers

Signal detection

Sensors

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