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Model
5528A
Squareness
Measurements
(In
A
Horizon
tal
Plane
)
What Alfects
Accuracy?
Since straightness optics
are used in
the squareness
measurement.
sq uareness
accuracy is
affected by
th
e same
faclOrs
thai
influence
st
rai
ght ness
accuracy.
See
th
e
information in
Secti
o
n
10
o
f thi
s User's Guide.
In
addition, the
sq uare
r,ess accuracy
is also
affected by
Ihe
accuracy
of
the
optical square's calibration
number, flatness
of the
mirrors
in
the squa re, which contribu tes
additional error like
that
illustra ted
in Figure
'O~
",
and misalignment
of
the input beam
ou
t
of
the optical
plane
of the
square.
These er rors can
be
minimized by using
the correct ca
libra tion
number
o
f
the
square
for
calculatio ns.
proper
alignment of
the
square,
and
utilization
of
the
procedures
given
in
Section 10
of
th
is Use r's
Guide.
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