Detailed Analysis of the Timing Measurements in Optical Position Sensing Devices Based on Laser Beam Deflection

Figure 3

(a) A 2D scanner projects a Lissajous pattern. In order to detect the horizontal deflection, a high photodetector would be necessary. (b) In order to measure one axis using the same detection scheme as in the 1D case, the other axis can be compressed using cylindrical optics.

(a)

(b)