| 摘要 |
PURPOSE: An image projection system using an optical coupling device is provided to scan simultaneously same images on plural screens by using the optical coupling device of an nxn structure. CONSTITUTION: An image projection system using an optical coupling device includes a laser, a plurality of optical coupling devices, and a plurality of optical scanning units. The laser(410) is used for radiating plural single color beams having different wavelengths. The optical coupling devices(420,430,440) include an optical transferring medium having plural input terminals and plural output terminals, and a connection part for connecting the input terminals to the output terminals. The optical coupling devices are used for receiving the single color beams and dividing the single color beams according to a predetermined ratio. The optical scanning units(450a,450b,450c) are used for scanning the divided single color beams on a screen. The connection part is used for forming an optical path. An optical coupling ratio is controlled by a ratio of the length of the connection part to the longitudinal direction.
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