MPS Microsystems - Solutions for defense & aerospace - Presentation - Page 3
SOLUTIONS FOR OPTICS & PHOTONICS INDUSTRY
Particle free laser focus mechanisms
For high power laser machining applications requiring
longer strokes and clean environment, MPS has developed
a hermetically sealed linear actuator. In this case, the drive
system is based on a
22 mm brushless DC
motor coupled to a Ø4
mm ball screw. MPS
L-510X linear bearings
insure smooth and play
free movement of the
carriage, on which the
lens holder is accurately
fixed. In order to protect
the optics from smallest particulates generated by the
tiny wear of the system, the guiding as well as the screw
drive mechanism are completely sealed by two bellows.
In the purpose of giving the closest answer to customer
requirements, the lens holder shape and size are adapted
to the dimension of the required lens obtained in optical
simulations.
Not only smart and elegant, the design has been strongly
optimized in width to allow stackable configurations
and bring the possibility to easily build more complex
optical functions. The
illustrations below show
a typical assembly of
several actuators with
adapted lens holders
allowing focusing and
magnification functions
of a laser beam.
This technology can easily be customized to very different
sizes and specifications. The geometry tested so far for one
actuator is reaching the following specifications (per lens):
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Stroke: 40 mm
Z- Pos. bidirectional repeatability: +/- 5.5 µm
Lateral deviation repeatability: +/- 4.5 µm
Lens holder tilts repeatability: +/- 0.1 mrad
Cost vs Resolution, proposing the system in open loop
with a homing sensor
Configurable multi-purpose zoom mechanism
Focusing a laser over a distance of several kilometers or
moving lenses very accurately in imaging based stereoscopic
surgical glasses require the lenses to remain coaxial with
no tilting over long strokes of 50 mm or more. For this
purpose, MPS has developed a scalable zoom platform that
can accommodate 1-4 movable groups of lenses depending
on customer requirements. The stroke as well as the size
of the lenses can be adjusted and though the size of the
system optimized.
