HP 5528A User Manual

Model 5528 A
Straightness
Mea s ur ements
11 - 16
5. Translale the Laser H ea d vertically and horizontally to keep the Laser beam from being
cl ipp ed by the alig nm ent ring o n the Straightness Retroreflector.
Check this by making s
ur e you can't see the beam on the Interfer ome t er surface th at fa ces
the Relror eflector.
Any translati on of the Laser Head will cause the two do ts to move from their position on the
R
ef lector, so you will again have to rOlate and translate the La ser Head (i.e., repeat step "4"
a nd step "5" severa l time s) before you are done.
You are finished with this procedure when the beam goes through the I nterferometer
withou t being clipped , and the two dots are symmetri ca l about th e Reflector's slotted
opening and in lin e w ith the junctio n of its mirrors. (See Figure 11-9.)
Final Adjustments (After Aligning)
1. Turn the L ase r Head's turret ring to "O THER ", if it is not already there.
2. Se lect the Exit port's sm all ape rtur e.
3. Watch the front of the Laser He ad as you turn the I nterferomete r 's bezel to bring the sc ribed
line parallel to the Straightness R ef lector 's slot.
Y ou should see two dots cross close to the L aser Head's ex it port. If you ca r, 't see these
dots -
a. Cut a hole in the middle of a piece of paper.
b.
Hold this paper between the Inte rf eromet er and the Reflector, but doser to the
Interferom eter. You sho uld see e ith er one dot or two dose ly sp aced daiS on the piece of
paper.
Be ca r efu l not to block the b ea m going from the Turning Mirror to the
Retroreflector (ve
rti c al axis only ).
c. Adjust the R ef l ector Mount 's mic rometers until the dot (s) disappear into the Inter-
ferometer.
d. Remove the paper and
l ook at the Laser Head. You should n ow see two dots on the front
of the L ase r Head.
Turn the
bezel until the dot s overlap.
4. Adjust the R ef l ecto r Mount 's micrometers until the overlapping dots arc ce ntered on the exit
port, and " hal o" the sma ll aperture.
5. Se t Ihe Laser Head's turr et ring to "STRAIGHT ",
6. Se lect the La ser Head ex it port' s large aperture.
7. Turn Ih e bezel slig hll y until the Laser Head's "SI GNAL" lighl comes on and the BEAM
STRENG TH meter indi ca tion is in Ihe green area .
NOTE
Only a slight ad justment of the bezel is ne cessa ry to do thi s.

HP 5528A Specifications

General

Brand	HP
Model	5528A
Category	Measuring Instruments
Language	English