Novel optical spatial filtering methods based on two-dimensional photodetector arrays
S. Bergeler, H. Krambeer · Measurement Science and Technology · 2004
In this paper, modified opto-electronic non-contact measuring techniques for the determination of velocity, direction of motion and particle size are presented. These techniques are based on the use of two-dimensional structured photodetector arrays such as CMOS sensors. The principle of measurement utilized is the optical spatial filtering method, which is in widespread use in industrial velocimeters.