Title:
投射光学系、拡大投射光学系、拡大投射装置及び画像投射装置
Document Type and Number:
Japanese Patent JP4210314
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To achieve a compact projection optical system which adopts an imaging optical system including a reflective surface, can correct chromatic aberration, and can project a large picture without distortion.SOLUTION: The projection optical system irradiates a light valve for forming an image with illumination light from a light source and magnifies the image formed on the light valve and projects the same on a plane projection surface. The projection optical system has: a first optical system 71 composed of one or more lenses and having positive power for forming an intermediate image of the image, between the projection surface and the light valve; one first reflective surface 721 provided between the intermediate image and the first optical system; and one second reflective surface 722 having the positive power for reflecting luminous flux diverged after the intermediate image is formed, to form the image on the projection surface. The first reflective surface 721, the first optical system 71 and the second reflective surface 722 are located in this order from the projection surface.
More Like This:
| JPH04138438 | ILLUMINATOR |
| JP2009081304 | PROJECTION OPTICAL SYSTEM, EXPOSURE APPARATUS, AND DEVICE MANUFACTURING METHOD |
| JP2009139480 | OPTICAL SYSTEM AND ENDOSCOPE USING THE SAME |
Inventors:
Atsushi Takaura
Kazuhiro Fujita
Nobuo Sakuma
Kazuhiro Fujita
Nobuo Sakuma
Application Number:
JP2007220413A
Publication Date:
January 14, 2009
Filing Date:
August 27, 2007
Export Citation:
Assignee:
株式会社リコー
International Classes:
G02B17/08; G02B13/18; G03B21/14
Domestic Patent References:
| JP7013157A | ||||
| JP4107521A | ||||
| JP2002174853A | ||||
| JP2002006398A | ||||
| JP2001264627A |
Attorney, Agent or Firm:
Shogo Honda
Toru Kabayama
Toru Kabayama