Table of Contents
Advertisement
,
Model
5528A
Angular Measu
rements
CONTENTS
SECTION 8
ANGULAR MEASUREMENTS
INTROD UCTION
OPERATING SPECI
FI
CATIONS
HARDWARE
REQU
IRED
I{ELATED
MEASUREMENTS
REFEREN
CE
MATERIAL
INSTAllATION
AND
ALIGNME NT OF
OPTICS
M[ASUREMENT
DISPLAY
SEITINGS
MAKING A
M[ASU
REMENT
WHAT AFF[CTS
ACCU RACY?
INTRODUCTION
An
,.
An~lIIM"
measu
rement
is
the mC;lsurement
of
the relative
angu lar
moveme
nt bctween
the
Re-
flector
.tnd
the
Interferometer
as
one
o
f them
is
moved
.
See
Appendix
A
for a
desc
ription
of
the
principles
on which
this
measuremcnt
is based
.
OPERATING SPECIFICATIONS
ACCURACY:
Angle
measurements
arc
accurate
within
±
0.
:n6
of displayed va
lue
±
0.05
arc-sec
per
metre
of
traveled
di
stance
of
the
moving optic.
This assumes
that
all angles
greater
than
±3600
arc--sec have been
corrected,
the Reflector
is
aligned
within 10
arc-min
using
autorcflec-
lion
techniques,
roll
alignment by
the
operator is withi
n
1 degree
rela-
tive to the
measu
rement p lane, and the temperature of
all
opt
ical
components is
stabi lized in the range
15-2S°C.
RESOLUTION:
0.1
arc-sec
RANGE:
±36000
arc-sec
AXIAL
SEPARATION:
(Typica l,
with p roper
alignment,
15-
25"C,
distan
ce
between
the
laser Head and
the Reflector.
)
15
metres
(SO
feel)
HARDWARE REQUIRED
In addition
to
the hardware required for
any
measurement using the
Laser
Measurement
System
(see
Fjgure
4-1
).
any
Angulal
measurement
requires
the
hardware
shown
in
Figure
8-1
.
"-1
Advertisement
Table of Contents
