2-4
Getting Started
Model 2520INT Quick Start Guide
Figure 2-3
Divergent beams
Collimated beams
Collimated beams differ from divergent beams in that the edges of the beam are parallel.
As shown in
, the beam diameter stays constant even as the distance from the
source increases.
Figure 2-4
Collimated beams
Light
Source
Detector
Entrance
Port
Light
Source
Detector
Entrance
Port