发明名称 Image projection apparatus
摘要 This invention is directed to an image projection apparatus. The apparatus comprises a light source having first and second high-luminance light-emitting portions along an optical axis, a reflecting mirror, arranged behind the light source, for reflecting light beams from the first and second light-emitting portions to direct the light beam from the first light-emitting portion toward a central portion of an image and direct the light from the second light-emitting portion toward a peripheral portion of the image, a projection optical system for projecting the image on a plane, and focusing means, arranged to be adjacent to the image and having a larger focusing effect at a peripheral portion than at a central portion, for causing the light beams from the first and second light-emitting portions to be incident on the projection optical system.
申请公布号 US5438379(A) 申请公布日期 1995.08.01
申请号 US19930156012 申请日期 1993.11.23
申请人 CANON KABUSHIKI KAISHA 发明人 KUREMATSU, KATSUMI
分类号 G02B27/18;F21V7/00;G02B3/04;G02B3/08;G02B19/00;G02F1/13;H04N9/31;(IPC1-7):G03B21/14;F21V7/08 主分类号 G02B27/18
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