ILLUMINATION SYSTEM AND OPTICAL PROJECTION APPARATUS

An illumination system including an optical element, a primary light source, an auxiliary light source, and a light guide element is provided. The primary light source and the auxiliary light source are disposed adjacent to the light incident end of the optical element. The primary light source prov...

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Bibliographische Detailangaben
1. Verfasser:	WANG SZE-KE
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	An illumination system including an optical element, a primary light source, an auxiliary light source, and a light guide element is provided. The primary light source and the auxiliary light source are disposed adjacent to the light incident end of the optical element. The primary light source provides a primary light beam, and the auxiliary light source provides an auxiliary light beam. The duration for the primary light source to reach the maximum light-emitting luminance is longer than that of the auxiliary light source. The light guide element is shifted in or away from the transmission path of the primary light beam, so that the illumination system provides an illumination light beam with an appropriate luminance. An optical projection apparatus having the above-described illumination system capable of promptly displaying images upon turning on is provided.