Patent ID: 7580007

Claim:
A method, comprising: Sweeping an image beam in a horizontal dimension according to a horizontal sinusoid having a phase; and sweeping the image beam back and fourth in a vertical dimension according to a vertical sinusoid, wherein the image beam is swept while the image beam is “on” from a first edge of an image to a second edge of the image continuously in a first direction of the vertical dimension, and wherein the image beam is swept while the image beam is “on,” from the second edge of the image to the first edge of the image continuously in a second direction of the vertical dimension, such that the image beam traverses a pattern that repeats every n h periods of the horizontal sinusoid, the vertical having a phase equal to - π 2 + π n h ⁡ [ k + 1 2 ] when the phase of the horizontal sinusoid equals ± π 2 and where k=0, 1, . . . (2n h −1).