LENS FOR RETROFITTING A LIGHTING SYSTEM WITH LED LIGHTS
An apparatus for retrofitting a HID lighting system includes using existing components of previously installed HID lighting systems such as its ballasts while replacing some capacitors to adjust the power supplied to a retrofit LED luminaire. Unused ballast drivers are removed, and a self-contained ballast driver assembly is mounted into the electronic control enclosure of the previously installed lighting system. Some of the retrofit LED luminaires include an uplighting lens, an optic, or a diffuser for providing uplight. An aiming bracket and an aiming plate allow for the horizontal aiming angle of a light luminaire to be set.
1 . A lens comprising:
an attachment portion including a first elongated aperture; and
a light directing portion that is elongated along a direction that is non-parallel to the first elongated aperture.
2 . The lens of claim 1 , wherein the attachment portion defines a rear mounting pad.
3 . The lens of claim 2 , wherein the rear mounting pad includes a substantially flat surface.
4 . The lens of claim 3 , wherein the attachment portion defines a front pocket.
5 . The lens of claim 4 , wherein the attachment portion defines a mounting aperture that extends through the rear mounting pad to the front pocket.
6 . The lens of claim 5 , wherein the front pocket incudes an elongated portion that extends along the direction that is non-parallel to the first elongated aperture, and a pair of downwardly extending slot portions that are in communication with the elongated portion.
7 . The lens of claim 6 , wherein the rear mounting pad includes an elongated pad portion that is at least coextensive with the elongated portion of the front pocket, and a pair of downwardly extending leg portions that are at least coextensive with the pair of downwardly extending slot portions.
8 . The lens of claim 3 , wherein the substantially flat surface defines a surface area that is at least 3.75 in. 2 .
9 . The lens of claim 8 , wherein the substantially flat surface defines a surface area that is at least 7.5 in. 2 .
10 . The lens of claim 9 , wherein the substantially flat surface defines a surface area that is within a range of +/−10% of 15.0 in. 2 .
11 . The lens of claim 3 , wherein the substantially flat surface is proud of the light directing portion along another direction that is non-parallel to the first elongated aperture.
13 . The lens of claim 12 , wherein the substantially flat surface is proud of the light directing portion an amount that is at least 0.002 of an inch.
14 . The lens of claim 13 , wherein the substantially flat surface is proud of the light directing portion an amount that is at least 0.005 of an inch.
15 . The lens of claim 1 , wherein the first elongated aperture is elongated along a vertical direction into the light directing portion, and the light directing portion is elongated along a horizontal direction.
16 . The lens of claim 15 , wherein the attachment portion and the light directing portion are thinnest along a direction that is perpendicular to the horizontal and the vertical directions.
17 . The lens of claim 15 , wherein the attachment portion includes a second elongated aperture that is elongated along the vertical direction into the light directing portion, and the second elongated aperture is spaced away from the first elongated aperture along the horizontal direction.
18 . The lens of claim 17 , wherein the attachment portion includes a first protuberance that defines the first elongated aperture, and a second protuberance that defines the second elongated aperture.
19 . The lens of claim 18 , wherein the attachment portion includes a wall that extends about the first elongated aperture, and the first round aperture.
20 . The lens of claim 18 , wherein the attachment portion includes a wall that extends about the second elongated aperture, and the second round aperture.
21 . The lens of claim 20 , wherein the same wall surrounds the first elongated aperture, the first round aperture, the second elongated aperture, and the second round aperture.
22 . A lens comprising:
an attachment portion including a first elongated aperture; and
a light directing portion that is elongated along a direction that is non-parallel to the first elongated aperture;
wherein the light directing portion defines a sawtooth pattern in a plane that is perpendicular to a horizontal direction.
23 . The lens of claim 22 , wherein the sawtooth pattern includes a first arcuate portion, a second arcuate portion, and a straight portion that connects the first arcuate portion to the second arcuate portion.
24 . The lens of claim 23 , wherein the first arcuate portion is defined by a spline that extends predominately along a vertical direction, and the straight portion extends predominately along a direction that is perpendicular to the horizontal and the vertical directions.
25 . The lens of claim 22 , wherein the light directing portion include defines a polynomial curve in a plane that is perpendicular to the direction along which the light directing portion is elongated.
26 . The lens of claim 25 , wherein the polynomial curve is a parametrically defined degree=(n−1) Bezier curve, controlled by a set of (n) discrete control points, and by the following equation: P(t)=(1−t) 2 Pr+2t(1−t)P q +t 2 P p where P r and P p are predetermined endpoints, and P q is a center point that is varied to change spread angles form incoming light rays to a desired target.
27 . The lens of claim 26 , wherein the x coordinate of a point on the Bezier curve is defined by the following equation: y(t)=(1−t) 2 y r +2t(1−t)y q +t 2 y p .
28 . The lens of claim 26 , wherein the z coordinate of a point on the Bezier curve is defined by the following equation: z(t)=(1−t) 2 z r +2t(1−t)z q +t 2 z p .
29 . The lens of claim 26 , wherein a Y coordinate of P r is 0, and a Z coordinate of P r is 0.
30 . The lens of claim 26 , wherein a Y coordinate of P p is 0.046 inches, and a Z coordinate of P p is 0.259 inches.
31 . The lens of claim 26 , wherein a Y coordinate of P q is 0.582, and a Y coordinate of P q is 0.184 inches.
32 . The lens of claim 22 , wherein the lens defines a first plane of symmetry that is perpendicular to a horizontal direction, and a second plane of symmetry that is perpendicular to a direction that is perpendicular to the horizontal direction, and a vertical direction.