LA5I!AON
AVOID EXPOSURE
LASER
RADIATION
IS
EMITTED
fROM
THIS
APERTURE
I
I
--h-
-~~
-
--
1.
LASER
ON Indicator: Indicates when
Laser
Head
is
re
ce
iving power
from Measurement Display unit.
2.
SIGNAL Indicator: Indic
ates
that
La
se
r return beam is strong enough
for a measurement.
J.
LASER
EXIT
PORT
: Source
of
l aser beam
for
all measurements. Also,
destination
of
laser return beam for Straightness measurements.
WARNING
LASER
RADIATION
IS
EMITTED
FROM
THIS
PORT.
DO
NOT
STARE
INTO HIE
BEAM
.
4.
LASER
RETURN
PORT
: Destination
of
laser return beam for Distance,
Velocity, and Angular measurement
s.
5.
APERTURE
CONTROLS: These are located behind both ports
in
the
turret. The
Exit
Port
's
aperture co
ntrol
has
thr
ee
positions - large
opening, small opening, and closed. The Return Port
's
s
hutter
has
two
positions - open and closed {which displays a target used for
alignment).
6.
TURRET
RING : A two-position
se
lector that
sw
itches elements in the
Ex
it and Return beam paths, depending on
whether
a
"STRAIGIH-
NESS"
mea
surement
Is
being made.
Figure 2-3.
La
ser
/-lead -
front
Model
5528A
First
look
2-9
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