Title:
IMAGING LENS SYSTEM AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/093377
Kind Code:
A1
Abstract:
The present invention provides an imaging lens system and an imaging device capable of imaging a long-distance object along the center optical axis at high resolution and imaging the vicinity thereof at a wide angle. An imaging lens system (11) comprises, in order from an object: a first lens group constituted by at least a first lens (L1), a second lens (L2), and a third lens (L3); an aperture stop (STOP); and a second lens group constituted by two or more lenses with a positive composite power. The image side of the first lens (L1) has a concave surface. The composite focal length of the first lens (L1) and the second lens (L2) is negative. The third lens (L3) has a positive power. The object side of the first lens (L1) has an aspherical surface. The incidence surface (object side) of the first lens (L1) has an inflection point.
Inventors:
MAKINO YUTAKA (JP)
SUGIYAMA TAKASHI (JP)
SUGIYAMA TAKASHI (JP)
Application Number:
PCT/JP2018/041345
Publication Date:
May 16, 2019
Filing Date:
November 07, 2018
Export Citation:
Assignee:
MAXELL LTD (JP)
International Classes:
G02B13/04; G02B13/18
Foreign References:
JP2001042218A | 2001-02-16 | |||
JPS62173415A | 1987-07-30 | |||
JP2004258132A | 2004-09-16 | |||
JP2005258467A | 2005-09-22 | |||
JP2005284153A | 2005-10-13 | |||
JPH03131809A | 1991-06-05 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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