42
43
From the information provided, let us com-
pute the air gap (flatness error) values at A an
B in Figure 5 below. There are 9 bands at A.
No Response Required
Each band represents a distance of /2 or 11.6
micro inches for orange light. Using the formu-
la of foldout-10, you calculate the air gap to
be ________ micro inches (at the widest point).
50
104.4
(Turn to page 48.)
Figure 5. Air gap (flatness error) comparisons.
57
points (areas)
58
When you compare the number of bands at A
with the number at B in foldout-12, you realize
contact
that the gap between the optical flat surface
and the surface of the piece-measured is _______
at B than it is at A (at the widest point).
64
convex
65
You can determine the type of slope being
examined by tilting one ______ of the _________
concave
flat as at B, or pressing on the _______ of the
optical _______ as at E in foldout-13.
72
73
From a close inspection of the bands at D
and E you will understand why the number of in-
bands
terference bands at E has ______ . The decrease
in the number of bands was due to the __________
decrease
in the ________ of the air gap.
80
width
81
In foldout-14, 2 inches is the ____________
from the ______ ______ of one block to the lead-
distance
ing edge of the other, and 1 inch is the _______
of the _________ block.
edge
46
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