US 11,808,923 B2
Imaging lens
Masaya Hashimoto, Sukagawa (JP)
Assigned to TOKYO VISIONARY OPTICS CO., LTD., Tokyo (JP)
Filed by TOKYO VISIONARY OPTICS CO., LTD., Tokyo (JP)
Filed on May 3, 2021, as Appl. No. 17/306,580.
Application 17/306,580 is a continuation of application No. 15/906,611, filed on Feb. 27, 2018, granted, now 10,996,436.
Application 15/906,611 is a continuation of application No. 15/357,329, filed on Nov. 21, 2016, granted, now 10,705,318, issued on Jul. 7, 2020.
Application 15/357,329 is a continuation of application No. 14/226,856, filed on Mar. 27, 2014, granted, now 9,507,125, issued on Nov. 29, 2016.
Claims priority of application No. 2013-188413 (JP), filed on Sep. 11, 2013.
Prior Publication US 2021/0255433 A1, Aug. 19, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 13/00 (2006.01); G06T 5/00 (2006.01); G09G 3/34 (2006.01); G02B 9/64 (2006.01); G02B 27/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 27/0025 (2013.01); G06T 5/002 (2013.01); G09G 3/3406 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0242 (2013.01); G09G 2320/0626 (2013.01); G09G 2360/16 (2013.01)] 19 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;
a second lens having positive or negative refractive power;
a third lens having negative refractive power;
a fourth lens that is a double-sided aspheric lens having positive or negative refractive power;
a fifth lens that is a double-sided aspheric lens having positive refractive power;
a sixth lens that is a double-sided aspheric lens having positive or negative refractive power;
a seventh lens that is a double-sided aspheric lens having negative refractive power; and
air gaps disposed between each pair of adjacent lenses,
wherein the imaging lens has a total of seven single lenses, the third lens has a convex surface on the object side near an optical axis, and an image-side surface of the sixth lens has an aspheric shape in which a portion near an optical axis has a concave shape and the concave shape changes to a convex shape in a peripheral portion distant from the optical axis.