	US 11,815,666 B2
	Wide-angle lens assembly including nine lenses of −−+++−++− or −−+++−+−+, or ten lenses of −−+++−−+++ or −−−+++−+−+ refractive powers
An-Kai Chang, Taichung (TW); and Po-Yuan Shih, 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., ShenZhen (CN); and Asia Optical Co., Inc., Taichung (TW)
Filed on Aug. 24, 2020, as Appl. No. 17/000,470.
Claims priority of application No. 201910842019.3 (CN), filed on Sep. 6, 2019; and application No. 201911300412.6 (CN), filed on Dec. 17, 2019.
Prior Publication US 2021/0072517 A1, Mar. 11, 2021
Int. Cl. G02B 13/04 (2006.01); G02B 9/64 (2006.01)

CPC G02B 13/04 (2013.01) [G02B 9/64 (2013.01)]

20 Claims

1. A wide-angle lens assembly comprising:

a first lens which is with negative refractive power and comprises a concave surface facing an image side;

a second lens which is a meniscus lens with negative refractive power;

a third lens which is with refractive power;

a fourth lens which is with positive refractive power and comprises a convex surface facing an object side;

a fifth lens which is a biconvex lens with positive refractive power and comprises a convex surface facing the object side and another convex surface facing the image side;

a sixth lens which is a biconvex lens with positive refractive power and comprises a convex surface facing the object side and another convex surface facing the image side;

a seventh lens which is with positive refractive power and comprises a convex surface facing the object side;

an eighth lens which is a biconcave lens with negative refractive power and comprises a concave surface facing the object side and another concave surface facing the image side;

a ninth lens which is with negative refractive power; and

a stop;

wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are arranged in order from the object side to the image side along an optical axis;

wherein the eighth lens is disposed between the fifth lens and the seventh lens and is cemented with at least one lens;

wherein the ninth lens is disposed between the fifth lens and the image side;

wherein the stop is disposed between the fourth lens and the sixth lens;

wherein the wide-angle lens assembly satisfies the following condition:

1.3<A/IH <2.1; wherein A is a diameter of the stop and IH is a maximum image height of the wide-angle lens assembly;

wherein the wide-angle lens assembly satisfies the following_condition:

wherein R_RL21is a radius of curvature of an object side surface of a lens second close to the image side, and R_RL22is a radius of curvature of an image side surface of a lens second close to the image side.