Patent ID: 9696006
Date: 2017-07-04
CPC Classifications: F21V,F21Y,G02B

Claim:
1. A lens having a radial center comprising: an optical axis at the radial center of the lens; a placing point intersecting with the optical axis and a bottom of the lens; a first, second and third optical region defined in sequential order; a first imaginary line defined between the placing point and a point within the first optical region; a second imaginary line defined between the placing point and a point within the second optical region; a third imaginary line defined between the placing point and a point within the third optical region; an angle defined between the optical axis and the second imaginary line is larger than an angle defined between the optical axis and the first imaginary line; an angle defined between the optical axis and the third imaginary line is larger than an angle defined between the optical axis and the second imaginary line; wherein the lens includes a main portion, and extending portion protruding from a central portion of a top end of the main portion, and a light concentrating portion protruding from a central portion of a top end of the extending portion, the main portion has a first inclining face and a first top face, the protruding portion has a second inclining face and a second top face, the light concentrating portion has an outer face; wherein a first cavity and a second cavity are configured along the optical axis and from bottom end to top end of the main portion, a third cavity connects with the second cavity and is configured towards the extending portion; wherein the first cavity includes a first inner face, the second cavity includes a second inner face, and the third cavity includes a third inner face and a fourth inner face; wherein the first top face and the second inclining face intersect to form a circular edge shown in diametric cross section of the lens to form first intersection point, the second inner face and the first inner face intersect to form a circular edge shown in diametric cross section of the lens to form second intersections points, the third inner face and the second inner face intersect to form a circular edge shown in diametric cross section of the lens to form third intersection points, the third inner face and the fourth inner face intersect to form a circular edge shown in diametric cross section of the lens to form fourth intersection points; wherein the fourth intersection points and the placing point cooperatively define an imaginary first line, the first intersection points, the second intersection points and the placing point cooperatively define an imaginary second line; wherein the imaginary first line projects around the optical axis to form a first conical area, the first conical area located in the lens defines the first optical region, the imaginary second line projects around the optical axis to form a second conical area, the second conical area located except the first optical region in the lens defines the second optical region, the third optical region defines between the second conical area and the bottom end of the lens.