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Analysis of Geometry and LID Data
Figure 9.16: The Ray Deviation and Checkerboard Dialog
viewing
These parameters determine the position of the viewer, the view
and the up direction of the geometry.
dimension nu, nv
Determines the number of cells in each direction, i.e. the resolution of the checkerboard-grid.
range in u,v
Determines the extent of the checkerboard image and the ray
deviation diagram in u- and v-direction.
button: calculate max box
If pressed a surrounding box with corresponding values for the
resolution is calculated.
radio button: checkerboard pat- Sets the type of the pattern to either checker, horizontal or vertical
stripes.
tern
board distance
The distance between the checkerboard and the lens to be examined. This value may have a positive or negative sign, so the
checkerboard image may be positioned at both sides of the lens.
Of course, to see any resulting deterioration in the pattern, the
lens must be positioned between the checkerboard and the observer.
cell size
The width of the squares (resp. stripes) in the checkerboard.
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