Checking Alignment for Beam Strength
1. Select the large opening for the laser Head's exit and return ports.
Remove the targets from the
Opti
cs.
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
TREN
GT
H 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
dot
s
on
the laser Head's return port target.
d.
Swi
t
ch
back to the large exit port aperture and the fully open return
po
rt.
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 Interferometer 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
s
ure
to rotate the
Angular Interferometer
so
the bottom
opening
lines
up
with the laser beam and the side with t
wo
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 Interferometer (
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. there
may
be
situations when you
need more capability. For more information, you should
turn
to Appendix C
for dimensions
of
the
Opti
cs,
and the
mounting
hardware.
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