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Model 5526A
Distance Measurements
INSTALLATION AND ALIGNMENT OF OPTICS
Important
Considerations
1.
The Interferometer Assembly must be located between the
Laser
Head
and the Re!roreflec!or
in the laser beam.
2.
The beam from !he laser Head mus!
enter
the Interferometer al the
"tai
l"
of
one
of
the arrows
on
il.s
label.
3.
Vibrations ilnd
loose co
nnecli
ons
musl be minimized by proper mounting. Avoid
lo
ng
extensions.
Make
sure
that all
supports
arc completely
stationary.
A spindle, for
example,
must be
secured
by a brake
so
it
won't
rolate.
(If
a brake isn't avai lable try using a hose damp
or
it
wedge.)
4.
The laser beam must be returned to the bottom port
on
the Laser
Head's
turrel.
5.
The Oplics must be
aligned to
Ihe laser beam well
enough
to keep the
cosine error
al
an
acceptable level.
(See
"What
Affects Accuracy?" and
th
e "E
rror
Budget Worksheet"
.)
6.
The
Optics
must be
aligned
to
the
laser beam well
enough
to keep the Beam
St rength
Indicator In
the green region along the entire Optia' palh.
7.
If
the Angular Opti cs have previously been installed, you
can
in stall
the Distance Optics by
simply
changing the
Optics,
without
changi
ng
the mounting hardware.
8.
The laser
HC3d turret
ring
should
be set to
"
OTHER
".
Description
1.
You wi
ll
initially
posi!ion the Optics around
th
e
laser
beam while they arc al the
near
end of
travel
using the procedures
below.
2.
Next, you
will adjust the
laser Head
to Irack the
Optic's
progression along
th
e
travel
path,
while
maintaining th
e
beam's
near·end·of·lravel position. (See
"GUNS
IGHT" alisnmenl
method in
Seclion
15
of
this
User's
Guide.)
3.
Finally,
you will
check
you
r
alignment to Insure the
"
Important
Considerations"
#5 and
#6
have been fulfilled
.
NOTE
Use
of the
Gu nsish
l
Alignment method is described in the
following
procedure.
Once
you
become familiar cnouSh with
alignment
principles.
you
may
want
(0
start
with
"
Autore·
flection"
(described in
Seclion
15)
or to align by
the
same
philosophy
as
the
"
Gunsight" method,
bUI
without
targets. (This
is called
the
"Overlapping
Dots" method and is also described in
Section
15)
6-7
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