HP 5528A User Manual page 213

Model 552BA
Squa reness Measurements (In A H orizonta l Pl ane)
12-6
ON MACHINES
WITH HORIZONTAL
SPINDLES
STRAIGHTNESS
REFLECTOR
SPINDLE _ _
"=:;:::;:::7
STRAIGHTNESS
RETROREFLECTOR
STRAIGHTNESS
INTERFEROMETER
OPTICAL
SQUARE
LASER HEAD
Figure 12-3. Firsl-axis Positioning of Optics (Cofllinued)