US 9,810,884 B2
Imaging lens
Yukio Sekine, Sukagawa (JP)
Assigned to KANTATSU CO., LTD., Yaita (JP)
Filed by KANTATSU CO., LTD., Yaita-shi, Tochigi (JP)
Filed on Dec. 23, 2016, as Appl. No. 15/390,241.
Application 15/390,241 is a continuation of application No. 15/198,606, filed on Jun. 30, 2016, granted, now 9,581,792.
Application 15/198,606 is a continuation of application No. 15/048,431, filed on Feb. 19, 2016, granted, now 9,599,799.
Application 15/048,431 is a continuation of application No. 14/287,288, filed on May 27, 2014, granted, now 9,291,798, issued on Mar. 22, 2016.
Claims priority of application No. 2013-116152 (JP), filed on May 31, 2013; and application No. 2014-035806 (JP), filed on Feb. 26, 2014.
Prior Publication US 2017/0108668 A1, Apr. 20, 2017
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 13/18 (2006.01); G02B 9/62 (2006.01); G02B 13/00 (2006.01); G02B 27/00 (2006.01); G02B 13/16 (2006.01); G02B 5/00 (2006.01); G02B 3/04 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/62 (2013.01); G02B 27/0025 (2013.01); G02B 3/04 (2013.01); G02B 5/005 (2013.01); G02B 13/002 (2013.01); G02B 13/0015 (2013.01); G02B 13/16 (2013.01); G02B 13/18 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An imaging lens for a solid-state image sensor, comprising in order from an object side to an image side of the imaging lens:
a first lens having positive refractive power and convex surfaces facing the object side and the image side;
a second lens having a convex surface facing the object side and a concave surface facing the image side;
a third lens that is a double-sided aspheric lens having positive refractive power;
a fourth lens that is a double-sided aspheric lens having positive refractive power;
a fifth lens that is a double-sided aspheric lens having negative refractive power and a convex surface facing the object side; and
a sixth lens that is a double-sided aspheric lens, at least one of an object-side surface and an image-side surface of the sixth lens having a pole-change point separated from an optical axis of the imaging lens.