| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology related to an illumination optical system applicable to a projector or the like, and to obtain good efficiency of use of light irrespective of the installation attitude of the projector or the like. ! SOLUTION: An illumination optical system includes a light source device 10 and a correction device 11. The light source device 10 includes a lamp 30 of an arc discharge type, and a reflector 50 that directs light of the lamp 30 to a light output direction. The correction device 11 is arranged in an optical path of the output light of the light source device 10, and senses a gravity direction G to move the optical path in the gravity direction G. ! COPYRIGHT: (C)2015,JPO&INPIT |
