Fig. 2.

Comparison of the spiral and Lissajous scanning patterns. Example scanning paths were drawn for (a) spiral and (b) Lissajous scanning patterns. Area illumination density is shown for (c) spiral and (d) Lissajous scanning, respectively. The color bar indicates the log₁₀ value of the density level normalized by the minimal area illumination intensity of the entire scanned region. Note that low-frequency values ($f_S=1$ and $f_R=100$ for (a), $f_X=31$ and $f_Y=30$ for (b)) were adopted solely for illustrating the trajectories in (a) and (b), whereas practical frequency values ($f_S=1.336$ and $f_R=1,368$ for (c), $f_X=1,368$ and $f_Y=1,370$ for (d)) were used for simulating the area illumination density in (c) and (d).