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1
Surface plate
2
Measurement grid
3
Laser head
4
Nameplate
*
76-mm (3-inch) margin
between grid and edge
of surface plate
**
102-mm (4-inch)
margin between the grid
and edge of the surface
plate
Chapter 9 Flatness Measurements
Setting Up for the Measurement
2
3
1
Figure 9-4. Measurement setup when flatness mirrors are used
Figures 9-3 and 9-4 include line numbers and uppercase letters that
indicate the end points and the midpoint of each standard line. These
numbers and letters are used in this documentation and in the software to
refer to the lines on the grid.
Now that you understand the grid border requirements, you are ready to
draw the perimeter lines of the measurement grid.
Measurements Reference Guide
4
A
B
1
6
H
7
2
G
*
C
3
8
4
D
5
F
E
*
*
**
9-9
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