MEMS-based adaptive optics scanning laser ophthalmoscopy.
We have developed a compact, robust adaptive optics (AO) scanning laser ophthalmoscope using a microelectromechanical (MEMS) deformable mirror (DM). Facilitated with a Shack-Hartmann wavefront sensor, the MEMS-DM-based AO operates a closed-loop modal wave aberration correction for the human eye and reduces wave aberrations in most eyes to below 0.1 microm rms. Lateral resolution is enhanced, and images reveal a clear cone mosaic near the foveal center. The significant increase in throughput allows for a confocal pinhole whose diameter is less than the Airy disc of the collection lens, thereby fully exploiting the axial resolution capabilities of the system.
Zhang
Yuhua
Y
School of Optometry, University of California, California 94720-2020, USA. yuhuazhang@berkeley.edu
Poonja
Siddharth
S
Roorda
Austin
A
D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D007909:Lenses; D018613:Microscopy, Confocal / Q000295:instrumentation* / Q000379:methods; D008904:Miniaturization; D019721:Ophthalmoscopes