Scrolling unit, color illuminating system, and projection...

Optics: image projectors – Particular condenser

Reexamination Certificate

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Details

C353S031000, C353S084000, C359S197100, C359S203100, C359S210100, C348S742000

Reexamination Certificate

active

07090359

ABSTRACT:
A scrolling unit for forming a color image through scrolling, and a color illuminating system and a projection system using the scrolling unit. The scrolling unit includes a first spiral lens disk, a second spiral lens disk, and a glass rod. The first spiral lens disk includes a plurality of cylindrical lens cells arranged in a spiral pattern and can be rotated. The second spiral lens disk is installed facing the first spiral lens disk and can be rotated at the same speed as the first spiral lens disk. The projection system includes a light source, an optical splitter for splitting light into light beams having different colors, and a scrolling unit that scrolls the light beams by periodically changing paths on which the light beams proceed. Also included is a light valve for forming an image, and a projection lens unit for enlarging and projecting the image.

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