Fig. 2.

Constant linear velocity spiral drive waveforms and scan pattern. (a) Galvanometer scanner drive waveforms. (b) Instantaneous frequency and (c) instantaneous amplitude of the drive waveforms as a function of time. (d) Linear velocity along spiral as a function of time. Velocity along spiral is constant resulting in uniform sampling pitch. GS: galvanometer scanners; $\text{Δ}\theta$ sampling pitch in angular dimension $\theta$ (along spiral); ∆r: sampling pitch in radial dimension r; r_end: radius of CLV spiral scan circular field of view; V_CLV: linear scan velocity. Scan pattern is undersampled along r for clarity.