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Title:
PROJECTING OPTICAL SYSTEM AND PROJECTOR
Document Type and Number:
WIPO Patent Application WO/2019/107483
Kind Code:
A1
Abstract:
Provided are a projecting optical system and a projector for projecting a landscape-oriented image and a portrait-oriented image at the same projection magnification in accordance with the orientation of an image on a screen. A first optical system (21), a first mirror (24), a second optical system (22), a second mirror (25), and a third optical system (23) are arranged in the stated order on an optical axis oriented from an image formation panel (13) toward a screen (15). A first optical axis (CL1) of the first optical system (21), a second optical axis (CL2) of the second optical system (22), and a third optical axis (CL3) of the third optical system (23) are U-shaped, and fluxes of the first optical axis (CL1) and the third optical axis (CL3) have inverse orientations. The first mirror (24), the second optical system (22), the second mirror (25), and the third optical system (23) are held relative to the first optical system (21), to make a second holding cylinder (42). The second holding cylinder (42) is rotated within a range of rotation of 45° relative to a first holding cylinder (41). When projecting a portrait-oriented image instead of a landscape-oriented image, the second holding cylinder (42) is rotated in increments of 45° relative to the first holding cylinder.

Inventors:
AMANO, Masaru (324 Uetake-cho 1-chome, Kita-ku, Saitama-sh, Saitama 24, 〒3319624, JP)
NAGATOSHI, Yukiko (324 Uetake-cho 1-chome, Kita-ku, Saitama-sh, Saitama 24, 〒3319624, JP)
KAYANO, Hironobu (324 Uetake-cho 1-chome, Kita-ku, Saitama-sh, Saitama 24, 〒3319624, JP)
ITO, Kenji (324 Uetake-cho 1-chome, Kita-ku, Saitama-sh, Saitama 24, 〒3319624, JP)
Application Number:
JP2018/043923
Publication Date:
June 06, 2019
Filing Date:
November 29, 2018
Export Citation:
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Assignee:
FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
International Classes:
G02B17/08; G03B21/14; H04N5/74
Domestic Patent References:
WO2017169903A12017-10-05
WO2017056925A12017-04-06
Foreign References:
JP2016191755A2016-11-10
JP2014153474A2014-08-25
JP2005128286A2005-05-19
Attorney, Agent or Firm:
KYORITSU INSTITUTE (Amix Otsuka Building 2F, 2-25-1 Kita Otsuka, Toshima-k, Tokyo 04, 〒1700004, JP)
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