Model
5528A
Glossilry
PilCh : Rotiltionill
movement
ilbout
a side-to-side
horizo
ntal
axis.
Ro
ll
: Rotation about a lengthwise horizontal axis.
Rota
ti
on
(o
f the laser I-lead): An angular adjustment
of
the
la
se
r Head
's
orien
ta
ti
on to
dir
ect the
la
se
r beam as required
for
your measurement.
Translation (
of
the laser Head): A
st
raight-line adjus
tment
of
the
la
ser
/-lead's p
os
iti
on
to
direct
the
la
se
r beam
as
required
for
your measuremenl.
Trigonometry: An angle
of
one degree
is
an
angle in
which
the rotation
is
11360
of
one
complete
rotation. 1 degree =
60
arc-minutes = 3600 arc-seconds.
A
waight
angle
is
an
angle
of
180° (180 degrees
).
A right angle is
an
angle
of
90°C.
An acute angle
is
an
angle between 0" and 90°.
An
obtuse angle
is
an
anglc between 90° and 180°.
The Trig
onom
etric Functions
of
an Ac
ut
e
An
gle
In Ihe right triangle ABC.
sine A =
sin
A = al e
cosine A =
cos
A = b
lc
tangent A = tan A = al b
cosecant A =
c;c
A = ci a
secant A =
sec
A = cl b
cotangent A = COl A = ctn A
""
bl a
B
c
a
A
~~--------
~--
----
~
C
b
Waveleng
th:
for
light, equal to the velocity
divided
by the frequency;
unit
s are distan
ce-pe
r-
cycle (al
though
the
"per-cycle"
is normally
omitted
).
Yaw: Rotation about a vertical
axis.
G-3
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