| 摘要 |
An illumination system, such as may be used to illuminate an image display device in an image projection system, includes a plurality of light sources capable of emitting output light. In some embodiments, the light sources are light emitting diodes (LEDs). The light-collecting system transforms light from the plurality of light sources into a substantially telecentric illumination beam. The substantially telecentric illumination beam passes into the integrating tunnel, to produce an illumination beam having a substantially uniform brightness cross-sectional profile.
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