| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a projector capable of efficiently cooling the whole surface of an optical element with a small flow rate. <P>SOLUTION: A projector 1 comprises a cooling device 4 for circulating a cooling fluid along the surface of an optical element 36. The cooling device 4 comprises: two discharge members 52, 62 configured separately from the optical element 36 and to discharge the cooling fluid to the optical element 36 in a state mounted on the optical element 36; and two rectification members 53, 63 formed integrally with the optical element 36 and configured to rectify part of the cooling fluid discharged from the discharge members 52, 62. Supposing the optical element 36 is virtually divided into a center side area ArO including a location where an optical axis Ax passes and an outer peripheral side area ArE other than the center side area ArO as seen from a direction along the optical axis Ax of light flux which is incident to the optical element 36, the two rectification members 53, 63 rectify part of the cooling fluid discharged from the discharge members 52, 62 to the center side area ArO, respectively. <P>COPYRIGHT: (C)2013,JPO&INPIT |
