Title:
TELECONVERTER LENS AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/154122
Kind Code:
A1
Abstract:
Provided are: a teleconverter lens that is sufficiently thin in the thickness direction of an imaging device even while having a conversion rate of at least 3; and an imaging optical system. A light beam entering the teleconverter lens (CL) is subjected to primary image formation by means of an objective section within the teleconverter lens (CL), and then enters a main lens (ML) via a relay section. The objective section includes, in sequence from the subject side, a first lens group (GR1(+)) having a positive refractive power, and a negative lens group (GR(-)) having a negative refractive power. The relay section includes, in sequence from the main lens side, a P2 lens having a positive refractive power, and a reflecting optical element for bending the light path. Also, the first positive lens group (GR1(+)) comprises no more than two lenses.
Inventors:
YAMASHITA ATSUSHI (JP)
OZAKI YUICHI (JP)
OZAKI YUICHI (JP)
Application Number:
PCT/JP2013/060781
Publication Date:
October 17, 2013
Filing Date:
April 10, 2013
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B13/00; G02B15/12; G02B13/18
Foreign References:
| JP2011007824A | 2011-01-13 | |||
| JP2005265878A | 2005-09-29 | |||
| JPS61193113A | 1986-08-27 | |||
| JPS63276012A | 1988-11-14 | |||
| JPH03136013A | 1991-06-10 |
Attorney, Agent or Firm:
TAMURA Keijiro et al. (JP)
Keijichiro Tamura (JP)
Keijichiro Tamura (JP)
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