Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
REAL-IMAGE ZOOM FINDER AND IMAGE PICK-UP DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/005376
Kind Code:
A1
Abstract:
[Problem] To make a zoom finder thinner in the image pick-up direction without reducing optical performance. [Solution] The present invention comprises the following in the order given, starting from the object side: a variable objective lens group comprising a first lens group (G1) having disposed in order from the object side a negative first group first lens (L11) and reflection member (H1), a positive second lens group (G2) that is moved when changing magnification, and a positive third lens group (G3) that is moved when changing magnification; an upright optical system (20) having a reflective surface for converting an upside down image into a right-side up image; and a positive ocular lens system (30). The present invention satisfies a conditional formula (1): 1.5

Inventors:
SATO, Kenichi (1-324 Uetake-cho, Kita-ku, Saitama-sh, Saitama 13, 〒3310813, JP)
Application Number:
JP2012/003916
Publication Date:
January 10, 2013
Filing Date:
June 15, 2012
Export Citation:
Click for automatic bibliography generation   Help
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:
G02B15/167; G02B13/18; G02B17/08; G02B25/00; G03B13/06
Foreign References:
JPH04171410A
JPH0675165A
JPH075360A
JPH08234103A
JPH1172706A
JP2000347101A
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)
Download PDF:
Claims: