US 12,345,951 B2
Wide-angle lens assembly
Yan-jie Syu, Taichung (TW)
Assigned to SINTAI OPTICAL (SHENZHEN) CO., LTD., Shenzhen (CN); and ASIA OPTICAL CO., INC., Taichung (TW)
Filed by SINTAI OPTICAL (SHENZHEN) CO., LTD., Guangdong (CN); and ASIA OPTICAL CO., INC., Taichung (TW)
Filed on May 20, 2022, as Appl. No. 17/664,392.
Claims priority of application No. 202110617752.2 (CN), filed on Jun. 3, 2021.
Prior Publication US 2022/0390722 A1, Dec. 8, 2022
Int. Cl. G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 13/06 (2006.01)
CPC G02B 9/64 (2013.01) [G02B 13/0045 (2013.01); G02B 13/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A wide-angle lens assembly comprising, in an order from an object side to an image side along an optical axis:
a first lens element with negative refractive power, having an image-side surface being concave;
a second lens element with negative refractive power, having an image-side surface being concave;
a third lens element with negative refractive power;
a fourth lens element with positive refractive power;
a fifth lens element with a refractive power;
a sixth lens element with positive refractive power, having an object-side surface being convex and an image-side surface being convex;
a seventh lens element with negative refractive power; and
an eighth lens element with positive refractive power, having an object-side surface being convex and an image-side surface being convex;
wherein wide-angle lens assembly further comprises an aperture stop disposed between two adjacent lens elements among the first lens element to the eighth lens element;
wherein the wide-angle lens assembly at least satisfies one of the following conditions:
−0.64≤(G7R2+G6R2)/GAR1≤−0.03; and
−1.29≤(G7R2−G6R2)/f3≤−0.62,
wherein GAR1 is a radius of curvature of the object-side surface of a first one of lens elements located in front of the aperture stop, G6R2 is a radius of curvature of the image-side surface of the sixth lens element, G7R2 is a radius of curvature of the image-side surface of the seventh lens element, and f3 is effective focal length of the third lens element,
wherein the wide-angle lens assembly further satisfies at least one of the following conditions:
−25.66≤f4+f3≤−5.19;
21.02≤f4+f6≤26.89;
18.66≤f4+f8≤23.13;
wherein f4 is effective focal length of the fourth lens element, f6 is effective focal length of the sixth lens element, and f8 is effective focal length of the eighth lens element.