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Model
5528A
Squltreness
Measuremenls
(In
A Horizontal
Plane)
STRAIGHTNESS
RETROREFLE CTOR
__
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ALI GNM
ENT
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RIN
G
y
INTERFEROMETER
Figure
12-8.
Alignmenr Ring on Srraightness
Retrorefleclor
12. Rc-5ecure the
Optical Square assembly
10
the
machine,
if
you
had to move it in step
"
11
".
13.
Seleci
Ihe
ex
it
pori's I,ugc
aperture.
14.
You are now
ready
to
align the
la
ser to the mach ine's
travel.
Review
the "CUNSIGHT"
method
of alignment in Section
15 of
this Use r's GUide.
Your
goal
is
10 adju
st
the la
se
r Head
to
tra ck the
Optic's
progression along the
travel
path
,
while maintaining the beam
's
near-end
-o
f-travel posi tion
.
You wi
ll
do
this
by
-
•
Keeping
the
beam in the
Alignment ring on
the
Retroreflcctor,
to maintain the
beam's
ncar-end-of
travel position,
and
-
•
Keeping
a
two-dol
pallern in
line
with the
center
of the
Optical Square'!'.
sial
,
and
sy mmetrica
l
about
it,
to mat ch
the Optic's travel.
This
will
be a liule different
than
aligning for
Distan
ce
and
Angular measurements,
since
with
Ihese alignments
you were only watching one
dOl
relative
to
a
target
cross hair.
15. Move
the
Inlcrferomeler
or the
Optical Square
to
the
far end of
tra
ve
l.
16.
Rolale the
laser
HCild
ve
rt
ica
ll
y
and
horizontally
to keep
the
two
dots
lined up
on Ihe
scribed
line al the
center
of lhe Optical Square's
51 01
and
sy
mmelrical
about this
opening
.
(See
Figure
12-6.)
Since the dots will move aparl as the Optics move, you
may
have to hold
a
ca
rd
on each
side
of
the
Optical
Square
's
slot
to
follow
th
eir
movement
.
12-13
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