Led lens and assembly
AssigneeBYD Company Limited
InventorHuijun ZHOU
Life of this patent
Estimating the term…
Abstract
A lens comprises an incident curved surface and an exit curved surface opposite to the incident curved surface. The incident curved surface and the exit curved surface are configured such that light emitted from a light emitting diode (LED) light source enters the lens through the incident curved surface and incident on the exit curved surface, and is refracted by the exit curved surface. The position of a point on the exit curved surface is represented by z=z0−√{square root over (r2−(x2+y2))}+ax2+by2+cx2y2, where x, y and z are respective coordinates along X, Y and Z axes, and parameters a, b, c, r and z0 are numbers determining the shape of the exit curved surface. The Z axis coincides with an optical axis of the lens.
Claims19
A lens comprising:
- an incident curved surface;
- and
- an exit curved surface opposite to the incident curved surface, wherein the incident curved surface and the exit curved surface are configured such that light emitted from a light emitting diode (LED) light source enters the lens through the incident curved surface and incident on the exit curved surface, and is refracted by the exit curved surface, wherein the position of a point on the exit curved surface is represented by z=z0−√{square root over (r2−(x2+y2))}+ax2+by2+cx2y2, where x, y and z are respective coordinates along X, Y and Z axes, and parameters a, b, c, r and z0 are numbers determining the shape of the exit curved surface, and wherein the Z axis coincides with an optical axis of the lens.
An assembly comprising:
- a base;
- a light emitting diode (LED) light source deposed on the base;
- and
- a lens including:
- an incident curved surface facing toward the light source, and
- an exit curved surface opposite to the incident curved surface, wherein the lens is configured such that light emitted from the light source enters the lens through the incident curved surface and incident on the exit curved surface, and is refracted by the exit curved surface, wherein the position of a point on the exit curved surface is represented by z=z0−√{square root over (r2−(x2+y2))}+ax2+by2+cx2y2, where x, y and z are respective coordinates along X, Y and Z axes, and parameters a, b, c, r and z0 are numbers determining the shape of the exit curved surface, and wherein the Z axis coincides with an optical axis of the lens.
An assembly used for a street lamp, comprising:
- a base;
- a light emitting diode (LED) light source deposed on the base;
- and
- a lens including:
- an incident curved surface facing toward the light source, and
- an exit curved surface opposite to the incident curved surface, wherein the lens is configured such that light emitted from the light source enters the lens through the incident curved surface and incident on the exit curved surface, and is refracted by the exit curved surface, wherein the position of a point on the exit curved surface is represented by z=z0−√{square root over (r2−(x2+y2))}+ax2+by2+cx2y2, where x, y and z are respective coordinates along X, Y and Z axes, and parameters a, b, c, r and z0 are numbers determining the shape of the exit curved surface, and wherein the Z axis coincides with an optical axis of the lens, and the X axis is parallel to a curb of a street.
Dependencies are inferred from the claim text.