Share with Facebook
Tweet This
Post on reddit
Share with LinkedIn
Add to CiteULike
Add to Mendeley
Add to BibSonomyAbstract
Sinusoidal rectification (i.e., desinusoiding) is necessary for scanning imaging systems and is typically achieved by calculating a rectification transform from a calibration image such as a regular grid. This approach is susceptible to error due to electronic or mechanical instability that can alter the phase of the imaging window with respect to the calibration transform. Here, we show a calibration-free rectification method implemented from live video of a scanning light ophthalmoscope (SLO) with or without adaptive optics (AO). This approach, which capitalizes on positional differences in the images obtained in the forward and backward scan directions, dynamically keeps the imaging window in phase with the motion of the sinusoidal resonant scanner, preventing errors from signal drift over time. A benefit of this approach is that it allows the light power across the field-of-view (FOV) to be modulated inversely to achieve uniform irradiance on the retina, a feature desirable for functional imaging methods and light safety in SLOs.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Francesco LaRocca, Derek Nankivil, Sina Farsiu, and Joseph A. Izatt
Biomed. Opt. Express 5(9) 3204-3216 (2014)
Qiang Yang, Jie Zhang, Koji Nozato, Kenichi Saito, David R. Williams, Austin Roorda, and Ethan A. Rossi
Biomed. Opt. Express 5(9) 3174-3191 (2014)
Xinqi Hu and Qiang Yang
J. Opt. Soc. Am. A 36(5) 716-721 (2019)