Performance of a MEMS-based AO-OCT system

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

doi:10.1117/12.771673

8 February 2008 Performance of a MEMS-based AO-OCT system

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

Proceedings Volume 6888, MEMS Adaptive Optics II; 68880G (2008) https://doi.org/10.1117/12.771673
Event: MOEMS-MEMS 2008 Micro and Nanofabrication, 2008, 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-D images of the retina. The AO-OCT system at UC Davis has been under development for 2 years and has demonstrated the utility of this technology for microscopic, volumetric, in vivo retinal imaging. The current system uses a bimorph deformable mirror (DM) made by AOptix Technologies, Inc. for low-order, high-stroke correction and a 140-actuator mirco-electrical-mechanical-system (MEMS) DM made by Boston Micromachines Corporation for high-order correction. We present our on-going characterization of AO system performance. The AO-OCT system typically has residual wavefront error of 100 nm rms. The correctable error in the system is dominated by low-order error that we believe is introduced by aliasing in the control loop. Careful characterization of the AO system will lead to improved performance and inform the design of future systems.

Citation Download Citation

Julia W. Evans, Robert J. Zawadzki, Steve Jones, Samelia Okpodu, Scot Olivier, and John S. Werner "Performance of a MEMS-based AO-OCT system", Proc. SPIE 6888, MEMS Adaptive Optics II, 68880G (8 February 2008); https://doi.org/10.1117/12.771673

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