Patent ID: 7187437

Claim:
An anomaly detector apparatus for detecting an anomaly in a substrate comprising: a plurality of sources of coherent light to shine the light directly onto the substrate surface and the light being reflected from the substrate; a stressing apparatus, which is juxtaposed to the substrate and which, can optionally, stress the substrate; a plurality of reflected light receiving apparatus for receiving the light reflected directly from the substrate whether the substrate is in a stressed or unstressed condition, wherein the sources of light are spaced to shine simultaneously on the entirety of the substrate surface to be tested and all of the receiving apparatus are spaced to receive the reflected light simultaneously to detect an anomaly on all substrate surfaces on which the light is shown; a comparator which views and compares images of reflected light from the reflected light receiving apparatus when the substrate is stressed or unstressed thereby ascertaining an anomaly in the substrate and which generates an output from the comparison; and a display apparatus electronically connected to the comparator for displaying the output from the comparator.