US 12,271,054 B2
Imaging optical lens assembly, image capturing apparatus and electronic device
Kuan-Ming Chen, 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 Dec. 28, 2023, as Appl. No. 18/398,661.
Application 18/398,661 is a continuation of application No. 17/511,732, filed on Oct. 27, 2021, granted, now 11,886,038.
Application 17/511,732 is a continuation of application No. 16/884,380, filed on May 27, 2020, granted, now 11,187,873, issued on Nov. 30, 2021.
Application 16/884,380 is a continuation of application No. 16/268,775, filed on Feb. 6, 2019, granted, now 10,705,316, issued on Jul. 7, 2020.
Application 16/268,775 is a continuation of application No. 15/603,630, filed on May 24, 2017, granted, now 10,247,911, issued on Apr. 2, 2019.
Application 15/603,630 is a continuation of application No. 15/131,452, filed on Apr. 18, 2016, granted, now 9,696,519, issued on Jul. 4, 2017.
Claims priority of application No. 104142068 (TW), filed on Dec. 15, 2015.
Prior Publication US 2024/0134153 A1, Apr. 25, 2024
Int. Cl. G02B 9/60 (2006.01); G02B 13/00 (2006.01)
CPC G02B 9/60 (2013.01) [G02B 13/0015 (2013.01); G02B 13/0045 (2013.01)] 27 Claims
OG exemplary drawing
 
1. An imaging optical 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 comprising an object-side surface facing toward the object side and an image-side surface facing toward the image side;
wherein a total number of lens elements of the imaging optical lens assembly is five, the first lens element has negative refractive power, the fourth lens element has positive refractive power, the fifth lens element has negative refractive power, a central thickness of the first lens element is larger than a central thickness of the third lens element, a curvature radius of the object-side surface of the second lens element and a curvature radius of the image-side surface of the second lens element have the same sign, the curvature radius of the image-side surface of the second lens element and a curvature radius of the image-side surface of the third lens element have different signs, a curvature radius of the object-side surface of the fourth lens element and a curvature radius of the image-side surface of the fifth lens element have different signs;
wherein a focal length of the first lens element is f1, a focal length of the third lens element is f3, the curvature radius of the object-side surface of the second lens element is R3, the curvature radius of the image-side surface of the second lens element is R4, and the following conditions are satisfied:
f1/f3<5.0; and
|R4/R3|<2.0.