| 摘要 |
PROBLEM TO BE SOLVED: To effectively enhance illumination efficiency by providing a projection system in which the projection pattern of a light beam projected to an optical path switching device is fully enclosed by the light receiving area of the optical path switching device. SOLUTION: The projection system includes a light source providing the light beam, a relay module relaying the light beam, changing the focal distance and the projection size of the light beam and consisting of at least one lens, the optical path switching device receiving and switching the light beam and having at least one light receiving area, and the optical path transfer device installed between the relay module and the optical path switching device, projecting the light beam at a 1st angle to the optical path switching device and having an incident surface inclined in a direction perpendicular to the incident direction of the light beam. COPYRIGHT: (C)2005,JPO&NCIPI
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