Fresnel Technologies, Inc.

Other

R. P. Falconer Corporation

Richard N Claytor

Russell G Torti

Robert P Falconer

Luigi Salvatore Fornari

Truman D Black

Oscar M Lechuga

Fabio Fabiano

A light source is provided which comprises an LED array containing a plurality of LEDs, and a lens array containing a plurality of lenslets. The lens array is aligned with the LED array such that one lenslet is disposed over each LED, wherein each of said plurality of lenslets comprises at least first and second sublenslets having first and second respective optical centers, and wherein at least one of said first and second optical centers deviates from the geometric center of the lenslet.

LED luminaire tiling with a lens array containing a plurality of lenslets

An infrared detector () is provided which comprises a pyroelectric detector () having first and second sensing elements (), an aperture stop (), and a Fresnel lens array (). The detector may be used as a passive infrared sensor unit for detecting intrusion into large openings.

Passive infrared detector

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.

Imaging lens for infrared cameras

A passive infrared motion detector that creates a detection pattern with non-diverging insensitive zones. The sensing elements are of alternating polarity and each has a width w. An optical collection system directs infrared radiation onto the sensing elements. The sensing elements are separated by a distance equal to an integer multiple of width w, with the integer being at least two. The optical centers of the optical collection system are separated by an integer multiple of width w, with the integer being at least two. The arrangement of the optical centers and the sensing elements results in a detection pattern with non-diverging insensitive zones, with the insensitive zones having a negligible width.

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Arlington, TX, United States of America

Richard N Claytor