OPTICAL FLAT CONSTRUCTION
From the table in foldout-8 you can deter-
a 3 C increase in temperature causes a linear
______________of _____ micro inch in pyrex.
a 3 C temperature increase causes a _________
expansion of _____ micro inch in fused quartz.
In addition to being round, the optical
be made of _______________ material.
be made of material with a _____ coefficient of
__________ ________________ .
have mating surfaces which are nearly _________
When an optical flat is used to measure the
flatness of a gage block surface, a monochroma-
tic light source is required. The ____________
No Response Required
light will be directed toward the mating
_________________ of the gage block.
When the reflected _______ ________ are out
of phase, they interfere with each other and pro-
duce dark bands (lines). The dark bands which
_______________________ ________ .
out of phase
Figure 4 shows that the __________ the dis-
tance between air gap surfaces, the larger num-
ber of _______________ ______. When the distance
between air gap surfaces is decreased, the num-