Illumination device having light collector with extended center lens

摘要

An illumination device includes a light source, and a light collector having a central lens part and a peripheral lens part surrounding at least a part of the central lens part. The central lens part is aligned along an optical axis of the light source and includes a central entrance surface, a central exit surface, and an extension part positioned between the central entry surface and the central exit surface. The light collector also has a peripheral lens part surrounding at least a part of the central lens part, the peripheral lens including a peripheral entrance surface, a peripheral reflection surface and a peripheral exit surface. The extension part protrudes from the peripheral exit surface and elevates the central exit surface a distance above the peripheral exit surface.

主权项

1. A light collector comprising:
a central lens part comprising a central entrance surface and a central exit surface; a peripheral lens part surrounding at least a part of said central lens part, said peripheral lens part comprising a peripheral entrance surface, a peripheral reflection surface, and a peripheral exit surface, wherein said central lens part comprises an extension part positioned between said central entry surface and said central exit surface, said extension part protruding from said peripheral exit surface and elevating said central exit surface a distance above said peripheral exit surface, said extension part comprising an outer surface connecting said central exit surface and said peripheral exit surface, said outer surface is an optically inactive surface arranged such that substantially no light exits said extension part through said outer surface.