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Model
5528A
Measurements Using
a
Plane
Mirror Interferometer
D-S
3.
Insert
the plane
mirror interferometer
into the
laser beam and fasten
10
the
mounL.
4.
Block
the
interferometer output
bea m.
Select
the
small aperture of
the
laser head and
the
target on
the receiver.
Adjust
the
interferometer and
the
laser hcad
(vertica
l and
horizontal Lranslation onl
y) to
get
the reference
return beam centered
on the receiver.
5.
Remove the
beam block from
the
interferometer outpuL. Adjust
the
interferometer
to
get both
the reference and
measurement return
beams to
overl ap on
the
center of
the
receiver.
6.
Check
the
alignment for
cosine error. See page 6-14
for
the
procedure.
7.
Select
the large aperture
on
the
laser head and
rotate the
receiver target out of
the
beam
path.
Distance Measurements
Distance measurements using a plane
mirror Interferometer
are made the same way as
v.ilh
a
linear
interferometer,
except
that
t he plane
mirror interlerometer cannot
be the moving
optic.
Refer
to
Section
6, Distance Measurements, for
Information about measurement
display set-
tings,
sensor
use,
ma
king
a
measurement,
and what
affects accuracy.
Velocity
Measurements
Velocity measurements using
a
plane
mirror interferometer
are made the same way as
with
a
linea
r
int
erferometer,
except thatl he plane
m
irror interlerometer ca nnot
be the
movi ng
optic.
Refer
L
o
Section
6, Distance Measurements,
and Section
7, VelOCity Measurements,
for
infor-
mation about measurement
display settings,
sensor
usc, making a measurement,
and what
af-
fects
accuracy. The
limit
ing
fa clor in
the accuracy
of velOCity
measurements is the
accuracy of
the electronics
in
the
velocity measurement
circuitry.
/
II
1070eA
HP 5
518A LASER HEAD
STAGE
F
igure 0 -5. Measurement Setup
SERIES 2732A
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