| 摘要 |
PROBLEM TO BE SOLVED: To provide a user-friendly projection device.SOLUTION: A projection device comprises: projection optical systems 22, 23, 24 in which projection light is refracted and projected; a housing 1 having a bottom surface 1a substantially parallel to an optical axis ax before refracted; and tilt mechanisms 11, 12, 13, 14 for making the bottom surface 1a of the housing 1 tilt to a placing surface 50 by a predetermined angle &thetas;1. |
