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Patent Searching and Data


Title:
PROJECTION OPTICAL ASSEMBLY AND PROJECTOR DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/005444
Kind Code:
A1
Abstract:
Provided is a projection optical assembly (1) which projects from a first image plane on the reduction-side to a second image plane on the enlargement-side, comprising: a first refraction optical assembly (11) which includes eight lenses (L1-L8) and forms a first intermediate image (31) on the enlargement side from light which enters from the reduction side; a second refraction optical assembly (12) which includes six lenses (L9-L14) and forms the first intermediate image (31) of the reduction side as a second intermediate image (32) of the enlargement side; and a first reflection optical assembly (20) including a first reflective surface with positive refraction (21a) which is located closer to the enlargement side than the second intermediate image (32).

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Inventors:
MATSUO, Takahiko (NITTOH KOGAKU K.K. 1538, Kamigawa 1-chome, Suwa-sh, Nagano 21, 〒3920021, JP)
Application Number:
JP2012/004384
Publication Date:
January 10, 2013
Filing Date:
July 05, 2012
Export Citation:
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Assignee:
NITTOH KOGAKU K.K. (4529, Oaza Konami Suwa-sh, Nagano 31, 〒3920131, JP)
日東光学株式会社 (〒31 長野県諏訪市大字湖南4529番地 Nagano, 〒3920131, JP)
International Classes:
G02B17/08; G02B13/16; G02B15/20; G03B21/14; G02B13/18; G02B13/22; G02B15/163
Foreign References:
JP2010244017A2010-10-28
JPH05333269A1993-12-17
JP2004295107A2004-10-21
JP2004258620A2004-09-16
JP2004258620A2004-09-16
JP2004295107A2004-10-21
Other References:
See also references of EP 2730961A4
Attorney, Agent or Firm:
IMAI, Akira et al. (Nihonseimei Matsumotoekimae Bldg. 8th Floor, 4-20 Chuo 1-chome, Matsumoto-sh, Nagano 11, 〒3900811, JP)
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Claims: