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23 February 2009Performance of a MEMS-based AO-OCT system using Fourier reconstruction
Adaptive optics (AO) and optical coherence tomography (OCT) are powerful imaging modalities that, when
combined, can provide high-resolution (3.5 μm isotropic), 3-D images of the retina. The AO-OCT system at
UC Davis has demonstrated the utility of this technology for microscopic, volumetric, in vivo retinal imaging.
The current system uses an AOptix bimorph deformable mirror (DM) for low-order, high-stroke correction and
a 140-actuator Boston Micromachines DM for high-order correction. Developments to improve performance or
functionality of the instrument are on-going. Based on previous work in system characterization we have focused
on improved AO control. We present preliminary results and remaining challenges for a newly implemented
Fourier transform reconstructor (FTR). The previously reported error budget analysis is also reviewed and
updated, with consideration of how to improve both the amount of residual error and the robustness of the
system. Careful characterization of the AO system will lead to improved performance and inform the design of
future systems.
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Julia W. Evans, Robert J. Zawadzki, Steve Jones, Scot Olivier, John S. Werner, "Performance of a MEMS-based AO-OCT system using Fourier reconstruction," Proc. SPIE 7209, MEMS Adaptive Optics III, 720905 (23 February 2009); https://doi.org/10.1117/12.808002