HP 5528A User Manual

Model 5528A
Alignment Techniques
I 0
I
DISPLACED I
-- I,
o I
RETROREFLECTOR I'
OOT 0 I
__ -L ~
INTERFEROMETER
DDT
Figure 15-3. Result of Retroreflec/or Movement
3. Now make a series of adjustments to the Laser Head until the beams returning from both
Optics are again centered on the Laser Head's return port target. (Use the procedure given
below with Figure 15-4 .)
Ve rli ca l Axis
a. Tilt the Laser Head up or down until both return dots are in line. ( See step "1" in Figure
15-4.)
(You are matching the Relroreflector's position with this adjustment.)
b. Now translate the Laser Head up or down until the Interferometer's return dot is again
centered on the Laser Head's
return port. ( See step "2" in Figure 15-4. ) (You are
maintaining the Interferometer's
position with this adjustment.) If the dots are no longer
in line at this point , keep repeating steps "a" and " b" until the dots are in line, as shown in
step
"2" of Figure 15-4.
Horizontal Axis
c.
Turn the Laser Head left or right until both dots overlap. ( See step " 3" in Figure 15-4. )
(You are matching the Reflector's position with this adjustment.)
d.
Now translate the Laser left or right until both dots movetothe cel1terofthe return port.
( See step "4" of Figure 15-4. ) (You are maintaining the Interferometer's position with this
adjustmenL)
If the dolS separate at this time, repeat steps "c" and "d" again. At the end of this
procedure, both dots should
overlap completely at the Laser Head's return port.
4. After aligning, continue to move The Retroreflector toward the end of travel. Stop and repeat
the previous procedures each
time the Retroreflector return beam gets close to being
clipped by the Interferometer , or at the end of travel.
15 -5

HP 5528A Specifications

General

Brand	HP
Model	5528A
Category	Measuring Instruments
Language	English