Performance of a MEMS-based AO-OCT system using Fourier reconstruction

Julia W. Evans; Robert J. Zawadzki; Steve Jones; Scot Olivier; John S. Werner

doi:10.1117/12.808002

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23 February 2009 Performance of a MEMS-based AO-OCT system using Fourier reconstruction

Julia W. Evans, Robert J. Zawadzki, Steve Jones, Scot Olivier, John S. Werner

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Proceedings Volume 7209, MEMS Adaptive Optics III; 720905 (2009) https://doi.org/10.1117/12.808002
Event: SPIE MOEMS-MEMS: Micro- and Nanofabrication, 2009, San Jose, California, United States

Abstract

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, and 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

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