Title:
IMAGING LENS AND ON-VEHICLE CAMERA
Document Type and Number:
Japanese Patent JP2015049453
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To suppress ghost generated in an imaging lens.SOLUTION: An imaging lens 100 includes, in order from the object side to the image side: a first lens L1 with negative refractive power having a meniscus shape with a convex surface facing the object side; a second lens L2 with positive refractive power having such a shape that the curvature radius of the image side surface is smaller than that of the object side surface; an aperture stop S; a third lens L3 with positive refractive power having a meniscus shape with a convex surface facing the object side; and a fourth lens L4 with positive refractive power having a meniscus shape with a convex surface facing the image side. At least one surface of the surfaces constituting the third lens L3 and the fourth lens L4 is an aspheric surface.
Inventors:
SEKINE ATSUSHI
Application Number:
JP2013182323A
Publication Date:
March 16, 2015
Filing Date:
September 03, 2013
Export Citation:
Assignee:
NIKON CORP
International Classes:
G02B13/18; G02B13/04
Attorney, Agent or Firm:
Fuyuki Nagai
Takao Watanabe
Takao Watanabe