US 12,321,038 B2
Optical photographing lens assembly, image capturing device and electronic device
Dung-Yi Hsieh, Taichung (TW); Chun-Yen Chen, Taichung (TW); Chun-Che Hsueh, Taichung (TW); and Hsin-Hsuan Huang, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Feb. 19, 2024, as Appl. No. 18/444,830.
Application 18/444,830 is a continuation of application No. 18/048,072, filed on Oct. 20, 2022, granted, now 11,940,667.
Application 18/048,072 is a continuation of application No. 16/781,375, filed on Feb. 4, 2020, granted, now 11,513,318, issued on Nov. 29, 2022.
Application 16/781,375 is a continuation of application No. 15/827,233, filed on Nov. 30, 2017, granted, now 10,591,701, issued on Mar. 17, 2020.
Application 15/827,233 is a continuation of application No. 14/834,629, filed on Aug. 25, 2015, granted, now 9,864,171, issued on Jan. 9, 2018.
Claims priority of application No. 104124080 (TW), filed on Jul. 24, 2015.
Prior Publication US 2024/0192466 A1, Jun. 13, 2024
Int. Cl. G02B 9/60 (2006.01); G02B 13/00 (2006.01)
CPC G02B 9/60 (2013.01) [G02B 13/0045 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical photographing lens assembly comprising five lens elements, the five lens elements being, in order from an object side to an image side:
a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element; each of the five lens elements has an object-side surface facing towards the object side and an image-side surface facing towards the image side;
wherein the second lens element has negative refractive power, the image-side surface of the second lens element is concave in a paraxial region thereof; the object-side surface of the third lens element is convex in a paraxial region thereof; the fourth lens element has negative refractive power, the image-side surface of the fourth lens element is concave in a paraxial region thereof; the object-side surface of the fifth lens element is convex in a paraxial region thereof;
wherein a total number of lens elements with refractive power of the optical photographing lens assembly is five; at least one of the object-side surface and the image-side surface of each of the five lens elements is aspheric; a curvature radius of the image-side surface of the first lens element and a curvature radius of the object-side surface of the fourth lens element have different signs; an absolute value of the curvature radius of the object-side surface of the fourth lens element is greater than an absolute value of a curvature radius of the object-side surface of the third lens element; an absolute value of the curvature radius of the image-side surface of the first lens element is greater than the absolute value of the curvature radius of the object-side surface of the third lens element; a central thickness of the second lens element is greater than an axial distance between the first lens element and the second lens element; an absolute value of a focal length of the fifth lens element is greater than an absolute value of a focal length of the first lens element;
wherein a central thickness of the fourth lens element is CT4, a central thickness of the fifth lens element is CT5, and the following condition is satisfied:
0.45<CT4/CT5≤0.95.