Appeal No. 00-0833
Application 08/985,676
magnifying the mark pattern with a microscopic
magnification lens;
taking a first magnified image of the mark pattern from
the microscopic magnification lens with the image sensing
device;
applying a successive load to the object surface;
taking a successive magnified image of the mark pattern
from the magnification lens with each successive load; and
utilizing a Young’s fringe phase shift analysis
processing means to calculate the dynamically loaded strain as
derived from the first and successive magnified images.
The Kanduth reference
7. Kanduth discloses an optical strain gauge sensor for
measuring deformations of the surface of an object (Kanduth
abstract).
8. Kanduth describes taking photographs of a first and
second area of the surface of the object before deformation of
the surface and taking photographs of the first and second
areas of the surface of the object after deformation of the
object surface (Kanduth, abstract and column 5, lines 37-39).
9. The distance between the first and second areas to
be photographed is determined by configuring two cameras side-
by-side at a predetermined distance from each other (Kanduth, 2
2Alternatively, a prism may be affixed to the end of
each camera to orient the images viewed by the two cameras at
3
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Last modified: November 3, 2007