PROJECTOR

• Main Author: NAKAMURA CHIGUSA
• Format: Patent
• Language: English
• Published: 20.05.2013
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; FREQUENCY-CHANGING; HOLOGRAPHY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PROBLEM TO BE SOLVED: To provide a projector capable of efficiently cooling the whole surface of an optical element with a small flow rate.SOLUTION: A projector 1 comprises a cooling device 4 for circulating a cooling fluid along the surface of an optical element 35. The cooling device 4 comprises: two first discharge parts PL2, PL3 and second discharge parts PL1, PL4. Supposing the optical element 35 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 35, the first discharge parts PL2, PL3 discharge a cooling fluid to the center side area ArO and the second discharge parts PL1, PL4 discharge the cooling fluid along the outer peripheral side area ArE.