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Checking Alignment for Beam Strength
1.
Select
the
large opening
for the laser Head's exit and return
ports.
Remove the
targets
from the
Optics.
Model 5528A
Angular Measurements
2.
Move the Optics over their full travel length while watching
the
BEAM
STRENGTH
meter.
The laser beam
is
strong
enough for making
a
measurement as long as the BEAM
STRENGTH
needle
stays
in
the green area of
the
meter.
If
the BEAM S
TRENGTH
meter's needle moves into the ted
area
-
il
.
Move
the Optics
to the
near end of
trilvel.
b.
Se lect
the
sma
ll
aperture for the laser Head's exil
port, and
the taqset for the return port.
c.
Adjust the Optics 10
overlap
their return
dots
on the
laser
Head's
return port target.
d.
Swi tch
back to the large
exit
port
aperture and
the fully
open
return
port.
c.
Check
again for BEAM
STRENGTH
.
If
alignment
is stilt
not good
enough
to make BEAM
STRENGTH
read in its
green
area,
repeat the
entire
Alignment
procedure.
Measurements Along A Perpendicular Axis
When
a
measurement
axis
is perpendicular
to
the laser
beam,
mount the Angular
Int
erferometer
in
line with
the
l
aser,
and
at
the
end of
the axis
you will
be
measuring
(see
Figure
8-9 ar,d
Figure
8-
10
for illustrations of
set-ups
for measurements perpendicular to
the
laser
beam).
Be sure to
rotate
the
Angular
Interferometer
so
the bottom
opening
lines up with the laser beam
and the
side
with two
openings
faces the moving Retroreflector.
To
align
the laser Measurement
System
along an axis perpendicular to the laser beam, attach the
Interferometer
target
to the bottom
opening on
the Int
erferometer (see
Figure 8-7)
,
and follow all
the instructions presented
in
the last
few
pages
.
Other Mounting Requirements
Although we have
tried
to provide
you with
a maximum
of
mounting flexibility.
the re
may be
situations
when you
need more
capability.
For
more information,
you should
turn to Appendix
C
for dimensions
of the
Optics,
and the mounting
hardware.
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