Chapter
4
Functional description
12
RAYLASE 3-Axis Subsystem AS-50 for Laser Beam Deflection
MN049 / v1.0.0
4
FUNCTIONAL DESCRIPTION
4.1
Subsystem
The subsystem can be used to deflect a laser beam in X and Y directions. This results in a
two-dimensional plane, within which a laser can be directed at any position. This area is
known as the "operating field" and is shown in fig. 3. Deflection is performed by two mirrors,
each of which is moved by a galvanometer scanner.
The focusing properties of the laser beam subsystem are determined by the linear translator.
The linear translator is fitted with one or two focusing lenses. An additional lens with linear
movement allows the focusing length to be adjusted.
In these systems, the lens with linear movement is moved within a small range by a galva-
nometer unit. This so-called linear translator allows the focusing length to be adjusted to the
relevant deflection angle of the deflection unit. Compared to an F-Theta lens, this provides a
relatively large operating field, in which the laser beam can be optimally focused at every
point. The size of the operating field is set manually during installation (
the field size). The optical system and the electronic components of the deflection unit can be
protected against contamination by installing a protection window over the beam output
(
