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.:
Date of Patent:
Nov. 24, 2015
Filed:
Sep. 24, 2013
Nalux Co., Ltd., Osaka-shi, Osaka, JP;
NALUX CO., LTD., Osaka, JP;
Abstract
An illumination lens includes a light receiving surface; and a light exit surface. When the axis ofis designated as Z-axis, a position of the bottom of the lens is designated as z=0 and X-axis and Y-axis are defined in a plane which contains z=0 and is perpendicular to Z-axis,is symmetric about YZ-plane and XZ-plane and a cross-sectional area of a cross section ofparallel to XY-plane monotonously decreases with increase in z-coordinate. When the maximum value of z-coordinate onis designated as d and a radius of the cross section ofat z=0 is designated as r, a point (x, y) on a cross section ofat z=0.3is represented by where a and b represent constants and and there exists a point at whichf(θ)≦0.95anda<0.5and b<0.5