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US 2015/0176799 A1Published application
Lens for illumination device
AssigneeChen-Wei Hsu
InventorChien Hung YEH
Life of this patent
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Abstract
A lens for an illumination device includes a lens having a first surface and a second surface which is connected to the second surface along an annular curved line which is composed of two symmetric curved lines. The two curved lines are connected to each other at a first end point and a second end point. Each of the two curved lines has a middle point. The first surface is a multiple-focus surface and located on the outer side of the lens. The patterns and paths of the light beams can be controlled by the first surface of the lens.
Claims4
A lens for an illumination device, comprising:
- a lens having a first surface and a second surface, the first and second surfaces connected to each other along an annular curved line which is composed of two symmetric curved lines, the two curved lines connected to each other at a first end point and a second end point, each of the two curved lines having a middle point, the first surface being a multiple-focus surface and located on an outer side of the lens.
Dependencies are inferred from the claim text.