The FARO Focus Premium works by sending an infrared laser beam
①
into the center of a rotating
mirror
②
. The mirror deflects the laser beam on a vertical rotation around the environment being
scanned; scattered light from surrounding objects is then reflected back into the scanner.
Figure 2-2 Laser Deflection
For distance measuring, the FARO Focus Premium uses phase-shift technology. This means that constant
waves of infrared light of varying length are projected outward from the scanner. Upon contact with an
object, the light is reflected back to the scanner. The distance from the scanner to the object is accurately
determined by measuring the phase shifts in the waves of the infrared light. HYPERMODULATION
TM
greatly enhances the signal-to-noise ratio of the modulated signal with the help of a special modulation
technology. The x, y, z coordinates of each point are then calculated by using angle encoders, which
measure the mirror rotation and the horizontal rotation of the FARO Focus Premium. These angles are
encoded simultaneously with the distance measurement. The scanner covers a 360° x 300° field of view.
Figure 2-3 Vertical and Horizontal Rotation
FARO
®
Focus Premium Laser Scanner User Manual
Chapter 2: Introduction
FARO Focus Premium (March 2022)
Page 4 of 157
