Illumination system
AssigneeYoung Optics Inc.
InventorS-Wei Chen
Life of this patent
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Abstract
An illumination system including at least one coherent light source, a light uniforming element, and a prism is provided. The coherent light source is capable of emitting a coherent beam. The light uniforming element is disposed on a transmission path of the coherent beam. The prism is disposed on the transmission path of the coherent beam and between the coherent light source and the light uniforming element. The prism has a light incident end and a light exit end. The light incident end has at least one incident polygonal pyramid portion protruding away from the light exit end. The prism is capable of rotating about an axis, and the axis extends from the light incident end to the light exit end. The illumination system effectively reduces the degree of the speckle phenomenon.
Claims19
An illumination system, comprising:
- at least one coherent light source, for emitting a coherent beam;
- a light uniforming element, disposed on a transmission path of the coherent beam;
- and
- a prism, disposed on the transmission path of the coherent beam and between the coherent light source and the light uniforming element, the prism having a light incident end and a light exit end, wherein the light incident end has a plurality of incident polygonal pyramid portions protruding away from the light exit end, and the prism is capable of rotating about an axis, the axis extends from the light incident end to the light exit end, the prism is annular-shaped, and the incident polygonal pyramid portions surround the axis.
Dependencies are inferred from the claim text.