Interference No. 104,649
Page No. 4
to systems designed to create the image of a fingerprint. A person of ordinary skill in this field
would have a Bachelor of Science degree in electrical, optical or computer engineering or a
closely related discipline, and at least 1-2 years of experience in the field. (Zhou's First
Declaration of Prof Mark A. Neifeld, ZX 2010, p. 2).
F7. A person of ordinary skill in the art would understand the term "reflected through total
internal reflection" to refer to the bouncing back of light from a surface of an optical medium. In
contrast, one skilled in the art would understand the term "refraction" to refer to the turning or
bending of any wave, such as a light or sound wave, when it passes from one medium into
another of a different density. (ZX 2010, pages 14-15, 1140-42).
5. Zhou et al., U.S. Patent No. 5,796,858
A. Zhou's Claims 1, 10, 11 and 14
F8. Zhou's claim I is also Count I and reads as follows:
I . A fingerprint sensing system comprising:
a sheet prism having
" sensing surface,
" plurality of rigid prismlets positioned opposite to the sensing surface,
each prismlet having an entrance surface and an exit surface,
each prismlet being adjacent to another prismlet,
the width of the sheet being more than ten times the maximum thickness
of any one of the prismicts;
such that when a finger is positioned on the sensing surface, a portion of illumination
radiation illuminating the system, entering a plurality of the entrance surfaces and
incident at the sensing surface is reflected through total ' internal reflection and emitted
from a plurality of the exit surfaces to create an image of the fingerprint.
(Zhou '858, claim 1).
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