Large-field-of-view, modular, stabilized, adaptive-optics-based scanning laser ophthalmoscope

SA Burns, R Tumbar, AE Elsner, D Ferguson… - JOSA A, 2007 - opg.optica.org
SA Burns, R Tumbar, AE Elsner, D Ferguson, DX Hammer
JOSA A, 2007opg.optica.org
We describe the design and performance of an adaptive optics retinal imager that is
optimized for use during dynamic correction for eye movements. The system incorporates a
retinal tracker and stabilizer, a wide-field line scan scanning laser ophthalmoscope (SLO),
and a high-resolution microelectromechanical-systems-based adaptive optics SLO. The
detection system incorporates selection and positioning of confocal apertures, allowing
measurement of images arising from different portions of the double pass retinal point …
We describe the design and performance of an adaptive optics retinal imager that is optimized for use during dynamic correction for eye movements. The system incorporates a retinal tracker and stabilizer, a wide-field line scan scanning laser ophthalmoscope (SLO), and a high-resolution microelectromechanical-systems-based adaptive optics SLO. The detection system incorporates selection and positioning of confocal apertures, allowing measurement of images arising from different portions of the double pass retinal point-spread function (psf). System performance was excellent. The adaptive optics increased the brightness and contrast for small confocal apertures by more than 2× and decreased the brightness of images obtained with displaced apertures, confirming the ability of the adaptive optics system to improve the psf. The retinal image was stabilized to within 18μm 90% of the time. Stabilization was sufficient for cross-correlation techniques to automatically align the images.
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