Mosaic3
49
Version 3.5 rev 8 May 2019
OPERATION
5.5 c
onditions
r
equired
for
L
aser
e
mission
If supplied with a laser, laser radiation can only be emitted from the Mosaic when all the conditions below have been
satisfied:
1. All cables are correctly connected to the control PC and between the Mosaic and its system components.
2. AC Power is applied to the Mosaic, its system components and the Power Switches (key switch) are ‘ON’.
3. All interlock switches must be CLOSED.
4. The control software must successfully connect to the Mosaic.
5. The laser(s) must be successfully initiated by the control software or by the hardware interface.
6. An illumination pattern must be exposed by the Mosaic.
5.6 o
pticaL
a
Lignment
The system shall be installed and aligned by the Installation Technician and will be optimized for an objective selected by
the user. The system’s alignment should not drift or change.
The user may however wish to alter the size of the illumination spot (and therefore power density) of the laser onto the
DMD.
5.6.1 i
LLumination
m
agnification
/p
oWer
d
ensity
c
ontroL
The laser illuminator subsystem (fibre collimator) is configured to illuminate a nearly circular spot on the DMD that
corresponds to the user’s desired work area. For users that wish to use the highest power densities, the area should be
as small as is practical.
Determine the desired area for laser illumination on the imaging monitor. The diameter of the spot may be adjusted to
achieve higher power densities (a smaller spot) or lower power densities (a larger spot).
Adjustment is made by loosening the 2 button head screws indicated on the zoom section of the fibre collimator and
sliding the screw heads (and thereby sliding the lens elements underneath) in opposite directions to obtain the desired
spot size while maintaining a sharp focus at the edge of the spot.
Note: Coloured dots are applied to the fibre collimator housing during installation and training to guide the user
to several pre-determined positions with sharp focus.
Figure 15: Fibre Collimator