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Model
5528A
Straig
htn
ess
Mea!tUremen
ts
I
Along A
Horizonta
l
Axis)
CONTENTS
SECTION 10
STRAIGHTNESS MEASUREMENTS
(ALONG A HORIZONTAL AXIS)
INTRODUCTION
OPERATING SP[CIFICATIONS
HARDWARE RE
Q UIRED
RELATED
MEASUREMENTS
REFE RENCE
MATERIAL
IN STALLATION
AND ALIGNMENT OF
OPTI
CS
MEASUREMENT DISPLAY
SETTI
NGS
MAKING A MEASUREMENT
WHAT AFFECTS
ACCU
RA
Cn
INTRODUCTION
A
"Straightn
ess"
measurement
iSl
he measurement
o
f perpendi cular
motior, along a travel pat
h.
This perpend icular
motion
can either
be
hori
zo
nta
lly
or
verti call
y
oriented
.
See
Appendix
A
fo
r
a
description
of the
princi
ples on
whi
ch thi
s
mCil surement is
based.
OPERATING SPECIFICATIONS
The following specifications
assume
that the
o
pl iona
l
Dimensional
Metrology
Anil
lysis
System
is
used in
conjunction
with
the
HP
5528A
to provide
ilverilging and ciliculation
ca
pabiliti
es for
Straightness.
Parall
elism
and
Squareness
measurements
and
thai the
Optical
Square
is
al
igned
within
5
arc-min
usi
ng aUlorefiection
techn
iqu
es.
Accuracy:
Overall
accuracy is
the sum
of
the two
co mpo
nents
below.
r
Overall
Accuracy
=
Optical
Reference
Accu racy
+
Measurement Accura
cy
Optin
l
Reference Accuracy
:2
Short
Range
O
ptics
:
M
etric Units
M
ode
:
0.15 M
2 microns
TIR
English
Units
M od
e
: 0.5 F2
micro
inches
TIR
L
o ng Range O plics
:
M
el,ic Units
M
ode
:
0.015 M
2
mi
crons
TIR
English
Unils
M
ode
:
0.05
F2
microlnches TIR
where:
TIR
=
To
tal
Indi
ca
ted
Reading
M
=
distance
of
tra
vcl
of
the moving
optic
in
metres
r
-
distance
o
f
travel
of
the
moving opt
ic
in
feet
10-1
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