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Patent Searching and Data


Title:
PROJECTION OPTICAL SYSTEM AND PROJECTION TYPE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/132297
Kind Code:
A1
Abstract:
[Problem] To enable the satisfactory correction of aberrations generated when performing focus adjustment in a projection optical system. [Solution] A first optical system (K1) constituted of a plurality of lenses and a second optical system (K2) consisting of one reflective mirror comprising a convex non spherical surface are provided, in order from the reduction side. All optical surfaces constituting the first optical system (K1) and the second optical system (K2) are formed so as to have rotational symmetry around one common axis. Focus adjustment is performed by independently moving each of two lens groups (Gs, Gk) of the first optical system (K1) along a common axis (Z1). Furthermore, from the two lens groups (Gs, Gk), the group of lenses (Gs) is placed on the reduction side and a lens in which the convex surface faces the magnification side is used as the lens (La) that is placed most on the magnification side of the lens group(Gs), therefore, an image formed on a conjugate plane (Gps) of the reduction side is magnified and projected on a conjugate plane (Gpk) on the magnification side.

Inventors:
AMANO, Masaru (1-324 Uetake-cho, Kita-ku, Saitama-sh, Saitama 13, 〒3310813, JP)
Application Number:
JP2012/001867
Publication Date:
October 04, 2012
Filing Date:
March 16, 2012
Export Citation:
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Assignee:
FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
富士フイルム株式会社 (〒20 東京都港区西麻布2丁目26番30号 Tokyo, 〒1068620, JP)
International Classes:
G02B17/08; G03B21/14
Foreign References:
JP2010122573A
JP2009058754A
JP2011033737A
JP2010204328A
JP2007323047A
JPH09258102A
JP2003015033A
JP2011253023A
JP2011253024A
Attorney, Agent or Firm:
YANAGIDA, Masashi et al. (YANAGIDA & Associates, 7F Shin-Yokohama KS Bldg., 3-18-3, Shin-Yokohama, Kohoku-ku, Yokohama-sh, Kanagawa 33, 〒2220033, JP)
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Claims: