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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9874341 B1

PDFFull Text
Date of Patent:
Jan. 23, 2018

Filed:

Jun. 29, 2015

Double fresnel pir lens

Applicant:

Cree, Inc., Durham, NC (US);

Inventors:

Jin Hong Lim, Cary, NC (US);

Kurt S. Wilcox, Libertyville, IL (US);

Jason Taylor, Cary, NC (US);

Assignee:

Cree, Inc., Durham, NC (US);

Attorney:

Withrow & Terranova, P.L.L.C.

Primary Examiner:

Peggy Neils

Int. Cl.
CPC ...
F21V 23/00 (2015.01); F21V 23/04 (2006.01); G01J 1/02 (2006.01); G01J 1/04 (2006.01); F21V 29/77 (2015.01); G01J 5/08 (2006.01); F21V 5/04 (2006.01); F21V 13/04 (2006.01); F21Y 115/10 (2016.01); F21Y 113/10 (2016.01); F21Y 113/13 (2016.01); G01J 1/42 (2006.01);
U.S. Cl.
CPC ...
F21V 23/0464 (2013.01); F21V 23/0471 (2013.01); F21V 29/777 (2015.01); G01J 1/0266 (2013.01); G01J 1/0271 (2013.01); G01J 1/0411 (2013.01); G01J 5/0806 (2013.01); F21V 5/04 (2013.01); F21V 13/04 (2013.01); F21V 23/002 (2013.01); F21Y 2113/10 (2016.08); F21Y 2113/13 (2016.08); F21Y 2115/10 (2016.08); G01J 2001/4247 (2013.01);
Abstract

A sensor module for a lighting fixture includes a module housing configured to be mounted to a lighting fixture, a light sensor mounted in the module housing, and a sensor cover over the light sensor. The sensor cover includes a first surface oriented to face a task surface within an area of interest, and a second surface opposite the first surface. The first surface includes a first Fresnel lens having a number of Fresnel ridges oriented in a first direction. The second surface includes a second Fresnel lens having a number of Fresnel ridges oriented in a second direction, which is different from the first direction. Providing the first Fresnel lens and the second Fresnel lens with differently oriented Fresnel ridges allows the sensor cover to focus light from a relatively large portion of the task surface to the light sensor while remaining small.

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