US 12,379,524 B2
Optical imaging lens assembly comprising a gradient refractive coating having a plurality of holes, imaging apparatus and electronic device
Wen-Yu Tsai, Taichung (TW); Chien-Pang Chang, Taichung (TW); Cheng-Yu Tsai, Taichung (TW); Chun-Hung Teng, Taichung (TW); and Kuo-Chiang Chu, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Aug. 18, 2022, as Appl. No. 17/820,604.
Claims priority of provisional application 63/239,434, filed on Sep. 1, 2021.
Claims priority of application No. 111129234 (TW), filed on Aug. 3, 2022.
Prior Publication US 2023/0073044 A1, Mar. 9, 2023
Int. Cl. G02B 1/115 (2015.01); G02B 3/00 (2006.01); G02B 5/04 (2006.01)
CPC G02B 1/115 (2013.01) [G02B 3/0087 (2013.01); G02B 5/04 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An optical imaging lens assembly, comprising:
at least one optical lens element;
wherein the optical lens element is made of glass, and the optical lens element comprises an anti-reflective coating, and the anti-reflective coating is arranged on at least one surface of the optical lens element comprising the anti-reflective coating;
wherein the anti-reflective coating comprises a high-low refractive coating and a gradient refractive coating, and the high-low refractive coating is arranged between the optical lens element comprising the anti-reflective coating and the gradient refractive coating;
wherein the high-low refractive coating comprises at least one high refractive coating layer and at least one low refractive coating layer, the high refractive coating layer and the low refractive coating layer are stacked in alternations, the low refractive coating layer is in contact with the optical lens element comprising the anti-reflective coating, and the low refractive coating layer is mainly made of aluminum oxide;
wherein the gradient refractive coating comprises a plurality of holes, the holes away from the optical lens element comprising the anti-reflective coating are relatively larger than the holes close to the optical lens element comprising the anti-reflective coating, and the gradient refractive coating is mainly made of metal oxide;
wherein a total thickness of the anti-reflective coating at a central region of the optical lens element comprising the anti-reflective coating is Tc, a total thickness of the anti-reflective coating at a peripheral region of the optical lens element comprising the anti-reflective coating is Tp, and the following condition is satisfied:
0%<|Tc−Tp|/Tc≤15.0%.