Model
SS28A
Angular Measurcments
6-10
5. Select the
sma
ll opening for the
la
ser
Head
's
exit pori, and rolate the t
arge
t into place over the
laser Head's bottom (return)
porI.
6. Attach the target to the Angular Interferometcr (
see
figure 8-7).
Thi
s targ
et
is
included with the
Optics.
The
target should
be
attached to the Angular Interferometer opening that is directed toward
the
la
se
r Head, and
in
such
a
way
that the small (3
mm
) hole is above the cr
ossha
ir.
Make sure the target
is
positioned
as
sq
uarely
as
possible relative to the
edges
of
the
Optic
.
Use
your fingers
to
match edges.
7.
Move
the Angular Interferometer (
or
translate the laser Head)
so
Ihe laser
Beam
goes
through
the target
's
hole.
8. Secure the entire assembly to the machine
in
such
a
way
that the Interferometer
is
as
square
as
possible relative
to
the incoming beam. (
The
Interferometer housing's pitch,
yaw,
and roll
limitations are
±2
degrees relative
to
the incoming beam.
The
HP
10785A
Po
st
and
Height
Adjuster will take
ca
re
of
two
of
the three requirements. depending on your measurement
se
t-
up
.)
9.
Remo
ve
the target from the Interferometer.
10
. Position the Reflector as dosely
as
po
ssib
le
to the Interferometer.
look
at
the front of the
la
se
r
Head and adjust the Reflector until the return beams hit the laser
loiead
bottom port's target.
This establishes the
"near end
of
travel". It
may
help to start by visually lining up the Reflector's
edges with the edges of the Interferometer.
11
. Secure the Reflector assembly to Ihe
ma
chine
so
it
is
square relati
ve
to the incoming beam and
so
that il
is
nol out-of-square in the " roll" direction by more than ±1 degree.
The
HP
10785A
Post
and Height Adjuster should automatically take care
of
this.
12
. Reattach the targets to the Interferometer and Reflector, except now attach them
50
-
• the hole in the Interferometer
's
target
is
centered around the beam,
and
-
• the cro
ss
hairs on the Reflector's target
are
also
centered on the
beam.
(
You
ca
n
po
sition the target over either Retrore
fl
ector. See Figure
8-8
.)
This
time you don't have
to
line
up
the
edges
of the largets with the
edges
of
Ihe Oplics (
in
fad,
you
ma
y not
be
able
to
do
so
and still m
ee
t the
co
nditions above
).
13.
You
are
now
rcady to align the
la
se
r 10 the machine's travel.
Turn to Section
15
of
this U
se
r's Guide and follow the instrUdions there for "GUNSIGHT"
alignment.
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