Title:
SINGLE-FOCUS IMAGING OPTICAL SYSTEM, LENS UNIT, AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/044934
Kind Code:
A1
Abstract:
Provided is a single-focus imaging optical system that is small-sized and has high optical performance despite having a wide angle of view. A single-focus imaging optical system 10 essentially comprises, in order from an object side, a first lens L1 having a negative refractive power, a biconcave second lens L2, a biconvex third lens L3, a diaphragm ST, a fourth lens L4 having a positive refractive power, a negative fifth lens L5 in which the object-side surface thereof is convex in the paraxial region, and a sixth lens L6 having a positive refractive power.
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Inventors:
YAMASHITA ATSUSHI (JP)
Application Number:
PCT/JP2018/032035
Publication Date:
March 07, 2019
Filing Date:
August 29, 2018
Export Citation:
Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B13/18; G02B13/04
Foreign References:
| JP2009092798A | 2009-04-30 | |||
| JP2008257109A | 2008-10-23 | |||
| JPS61123810A | 1986-06-11 | |||
| JP2006251437A | 2006-09-21 | |||
| JP2004245982A | 2004-09-02 | |||
| JP2017156570A | 2017-09-07 |
Attorney, Agent or Firm:
FUKUDA, Mitsuhiro (JP)
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