Product description
28
© SICK AG · Germany · All rights reserved · Subject to change without notice
8012471/ZN27/2017-06-09
Operating Instructions
LMS1xx Laser Measurement Sensors
Chapter
3
3.6.2
Beam diameter and distance between measured points
With increasing distance from the LMS1xx the laser beam of the LMS1xx increases in size.
As a result the diameter of the measured point on the surface of the object increases.
The distance-dependent diameter of the measured point is the
distance (mm (in)) × 0.015 rad +
8
mm.
Fig. 14:
Beam expansion
With increasing distance from the LMS1xx, the distance between the individual measured
points also increases. The distance between the measured points is also dependent on the
angular resolution configured. With a coarser resolution, the distance is larger, with a finer
resolution the distance is smaller. The distance-dependent spacing between the measured
points is the tangent of the angular resolution × distance.
Fig. 15:
Schematic layout of the distance between measured points at different angular
resolutions
The diagram in
shows the beam diameter and the measured point
spacing as a function of the distance from the LMS1xx.
Important
The beam diameter is always greater than the measured point spacing. As a result full
scanning without gaps is ensured.
Optical axis
Expanding laser beam
Beam diameter at the optics cover
= 8 mm
Scan with 0.50°
angular resolution
Scan with 0.25°
angular resolution
Measured point
