Title:
プロジェクタ
Document Type and Number:
Japanese Patent JP6377252
Kind Code:
B2
Abstract:
A projection lens has lens holding frames that hold lenses. In a case where an image forming panel is disposed to be shifted with respect to an optical axis of the projection lens, an increase in temperature of a first part on a side to which the image forming panel is shifted with respect to the optical axis L, is greater than that of a second part on the opposite side. A hollow structure, which makes the first part 36f and the second part 36g communicate with each other, has a porous layer and is filled with a heat storage medium. By circulating the heat storage medium through the inside of the hollow structure, the first part is cooled, and the second part is heated. Therefore, temperature distribution in the circumferential direction of the lens barrel becomes uniform, and deterioration in performance of the projected image is suppressed.
Inventors:
Hitoshi Shimizu
Application Number:
JP2017509329A
Publication Date:
August 22, 2018
Filing Date:
January 28, 2016
Export Citation:
Assignee:
FUJIFILM Corporation
International Classes:
G03B21/16; G02B7/02; G03B21/14; H04N5/74
Domestic Patent References:
| JP2013229894A | ||||
| JP2011209393A | ||||
| JP2010243542A | ||||
| JP2009092817A | ||||
| JP2008058661A | ||||
| JP2008058654A | ||||
| JP2004082166A |
Foreign References:
| EP2481980A1 |
Attorney, Agent or Firm:
Kobayashi International Patent Office