Galvanometer response optimization for ophthalmic OCT/OCTA

Optical coherence tomography (OCT) sampling density and acquisition time is directly related to scanning mirror performance. A galvanometer impulse response that is broad or rings reduces the linearly-sampled regions of OCT B-scans and can increase total acquisition time, cause nonlinear distortions, and reduce resolution and contrast in OCT angiography (OCTA). Here, we utilize hardware and software optimizations to improve galvanometer frequency response in order to minimize scanner settling time and are thus able to improve imaging speed and maximize sampling linearity and field-of-view (FOV). We believe these methods can benefit both real-time retinal tracking in OCT and OCTA acquisition protocols.