Chapter 4 Operating instructions
S100
14 © SICK AG • Subject to change without notice 8012238/YY30/2015-02-20
4.3.1 Principles of operation
The S100 is an optical sensor that scans its surroundings in two dimensions using infrared
laser beams. It is used for protecting machines or vehicles.
The S100 works on the principle of time of flight measurement. It sends out very short
pulses of light (S). At the same time an “electronic stopwatch” is started. When the light
hits an object, it is reflected and received by the laser scanner (E). From the time between
sending and reception (∆t) the S100 calculates the distance to the object.
In the S100 there is also a mirror rotating at constant speed that deflects the light pulses
such that they cover an arc of 270° . In this way an object can be detected in the
switching field within 270°. The first beam of a scan starts at –45° relative to the back
of the laser scanner.
The S100 emits its pulse of light with an angular resolution of 0.5° (on the S100
Professional it is possible to switch to an angular resolution of 1° to be able to configure
more than eight switching fields) .
Fig. 2: Principle of operation,
time of flight measurement
Fig. 3: Principle of operation,
rotation of the S100
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