Title:
投影装置
Document Type and Number:
Japanese Patent JP5141243
Kind Code:
B2
Abstract:
A projection apparatus including an image display element for modulating illumination light, an illumination optical system for irradiating the illumination light onto the image display element, a projection optical system for projecting the modulated light by the image display element onto a projection surface, and an optical system changing section for changing the illumination optical system, wherein the illumination optical system includes a light source, a condensing optical system, a rod integrator and an illumination relay optical system wherein the projection optical system includes a projection variable-aperture diaphragm whose aperture diameter can be adjusted, and wherein the optical system changing section changes, when the aperture diameter of the projection variable-aperture diaphragm is made smaller, the illumination optical system such that an amount of light passing through the projection variable-aperture diaphragm with that aperture diameter increases.
Inventors:
Yasumasa Sawai
Application Number:
JP2007336184A
Publication Date:
February 13, 2013
Filing Date:
December 27, 2007
Export Citation:
Assignee:
Konica Minolta Advanced Layer Co., Ltd.
International Classes:
G03B21/00; G03B9/06
Domestic Patent References:
| JP2007206549A | ||||
| JP2006285089A | ||||
| JP10039252A | ||||
| JP2007121602A | ||||
| JP2007219049A | ||||
| JP2000131757A | ||||
| JP2006293086A | ||||
| JP2000010044A | ||||
| JP2007310277A | ||||
| JP2006154327A |
Attorney, Agent or Firm:
Shizuo Sano
Inoue On
Inoue On