US 12,235,409 B2
Optical lens assembly, imaging apparatus and electronic device
Wen-Yu Tsai, Taichung (TW); Chien-Pang Chang, Taichung (TW); Chi-Wei Chi, Taichung (TW); Wei-Fong Hong, 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 Dec. 17, 2021, as Appl. No. 17/553,939.
Claims priority of provisional application 63/137,772, filed on Jan. 15, 2021.
Claims priority of provisional application 63/129,826, filed on Dec. 23, 2020.
Claims priority of application No. 110121227 (TW), filed on Jun. 10, 2021.
Prior Publication US 2022/0196881 A1, Jun. 23, 2022
Int. Cl. G02B 1/11 (2015.01); G02B 1/115 (2015.01); G02B 1/00 (2006.01); G02B 3/08 (2006.01); G02B 13/18 (2006.01)
CPC G02B 1/115 (2013.01) [G02B 1/002 (2013.01); G02B 3/08 (2013.01); G02B 13/18 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An optical lens assembly, comprising, from an object side to an image side:
at least four optical lens elements;
wherein at least one of the at least four optical lens elements comprises an anti-reflective coating, the at least one optical lens element comprising the anti-reflective coating is made of a plastic material, the anti-reflective coating is arranged on an object-side surface or an image-side surface of the at least one optical lens element comprising the anti-reflective coating, the anti-reflective coating comprises at least one coating layer, one of the at least one coating layer at the outer of the anti-reflective coating is made of ceramics, the anti-reflective coating comprises a plurality of holes, and sizes of the plurality of holes adjacent to the outer of the anti-reflective coating are larger than sizes of the plurality of holes adjacent to the inner of the anti-reflective coating;
wherein a total thickness of the anti-reflective coating at a central region of the at least one optical lens element comprising the anti-reflective coating is Tc, a total thickness of the anti-reflective coating at a peripheral region of the at least one optical lens element comprising the anti-reflective coating is Tp, a major anti-reflective coating arranging factor of the optical lens assembly is FAR, and the following conditions are satisfied:
|Tc−Tp|/Tc≤5.00%; and
−1.5≤FAR.