HP 5528A

Model 5528A
Squareness Mea s urement s (In a Verlic al Plane)
7. Mount the Straightness Accessory Kit 's Straightn ess R etror e flector where the tool normall y
mount
s, as shown in Figure 13 ·6 .
6. Screw the Interferometer into the large Re lr orefl ec tor, using the two) mm flathead sc rews
provided.
9. Orient the Re lro reflector so it overlaps the Optic al Sq uar e and the Turning M i rror , but wi th
the Interferometer over the Opti cal Square.
10 . Fa sten the Re tro reflector il sse mbly to th e ma chine ir, such a way that the Int erferometer is as
square as p ossi bl e to the Opti ca l Square and to the inco ming beam. Th e I nterferometer
hou si n lS's pitch limitations are ± 2 degree s; its yaw and rolilimilations are ± S degrees. Th e
pitch and
yaw requirements will be taken ca re o f automatica ll y by using the St raightne ss
Relroreflec tor and an HP Post.
r<=
STRAIGHTNESS
'\
RETROREFLECTOR ---------..
10774A OR 1077SA
~
INTERFEROMETER ---------"
rd
__ --~ _ ___ ~
rl gu re 1 J· 6. Inlerf er ome ler j Rclr ore ffe cto r Moun/lng
1' 1. P os ition the Optical Square and Turnin g Mirror relative to the Rc tro reflector and
Inte rf e rom eter.
a. Bri ng the Interf e romctcr / RClr or efl ecto r a sse mbl y d o se enoug h to the Optical Square to
line up the Interferometer with the center
of the Opti ca l Square's slot. (l oo k i nt o the
Optical S qua r e'~ ot her slat 10 he lp do thi s. )
This
iSJ ve ry i mporlant ste p. If the Optic s ar c not ph ysica lly tined lip at this point, ali gni ng
al ong the ve rl ica l tra ve l axis w ill be impossibl e. This also cs ta bli sh es the " near end of
travel ", i.e .. any later mo vement o f the ma c hine can on ly incr ease the di stance bet wee n
th e Op t ics.
b. Make sure the Turning Mirr or is s qu are relative to the Optical S qu ar c,a nd is not t ilted to
either side.
13·9