Results
Deformation With a Projected Grid ? Our First Try

In our first attempt to do the reflected grid method described in the
background, we obtained the following results.  Figure 1 is five
consecutive frames of a BB impacting glass viewed using the grid
reflection method.

[bad_grid.jpg]

Figure 1.  Five consecutive frames of BB impacting glass with
projected grid.  This glass piece was 8x1 1/8x 3/32".  The phantom
camera was used with f/2.8 and 75,000 fps.  4 pumps on the BB gun.  28
mm lens.  Exposure time 18.25 micro seconds.

Discussion