Title:
投射光学系及び画像投射装置
Document Type and Number:
Japanese Patent JP5874263
Kind Code:
B2
Abstract:
Disclosed is a projection optical system including a first optical system configured to form a first image conjugate to an object and have an optical axis and a second optical system configured to project a second image conjugate to the first image onto a surface to be projected on, wherein the first image satisfies a condition of:
wherein Im denotes a length of the first image in a direction of an optical axis of the first optical system, normalized by a focal length of the first optical system, and Tr denotes a throw ratio for the projection optical system.
Inventors:
Tatsuya Takahashi
Kazuhiro Fujita
Kazunari Abe
Kazuhiro Fujita
Kazunari Abe
Application Number:
JP2011201690A
Publication Date:
March 02, 2016
Filing Date:
September 15, 2011
Export Citation:
Assignee:
株式会社リコー
International Classes:
G02B13/00; G02B17/08; G03B21/14
Domestic Patent References:
| JP2007079524A | ||||
| JP2010244017A | ||||
| JP2007011248A | ||||
| JP2005509178A |
Foreign References:
| WO2011089042A1 | ||||
| US2510080 |
Attorney, Agent or Firm:
Tadahiko Ito
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