Optical: systems and elements – Lens – With multipart element
Reexamination Certificate
2007-03-06
2007-03-06
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Lens
With multipart element
C359S356000
Reexamination Certificate
active
10681005
ABSTRACT:
An infrared imaging device is provided which comprises first and second plastic Fresnel lenses that are in optical communication with each other. Each of the first and second lenses have a first major surface which is convex and a second major surface which comprises a Fresnel surface. The first lens is adapted to mimic a meniscus asphere correct for conjugates of infinity and for the focal length of said first lens, and the second lens is adapted to mimic a meniscus asphere and is further adapted to act as a field flattener.
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Photonics Dictionary; http://www.photonics.com/dictHome.aspx; seach term=condenser.
http://www.fresneltech.com, printed Dec. 31, 2003, 10 pages.
Fortkort John A.
Fortkort & Houston P.C.
Fresnel Technologies Inc.
Sugarman Scott J.
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