US 12,411,307 B2
Optical lens assembly, imaging apparatus and electronic device
Chien-Pang Chang, Taichung (TW); Wen-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 Dec. 17, 2021, as Appl. No. 17/553,963.
Claims priority of provisional application 63/129,826, filed on Dec. 23, 2020.
Claims priority of provisional application 63/137,772, filed on Jan. 15, 2021.
Claims priority of application No. 110134271 (TW), filed on Sep. 14, 2021.
Prior Publication US 2022/0196970 A1, Jun. 23, 2022
Int. Cl. G02B 1/11 (2015.01); G02B 1/04 (2006.01); G02B 9/60 (2006.01); G02B 9/62 (2006.01); G02B 9/64 (2006.01)
CPC G02B 9/60 (2013.01) [G02B 1/04 (2013.01); G02B 1/11 (2013.01); G02B 9/62 (2013.01); G02B 9/64 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An optical lens assembly, comprising, from an object side to an image side:
at least five optical lens elements;
wherein at least one of the optical lens elements comprises an anti-reflective coating, the 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 optical lens element comprising the anti-reflective coating, the anti-reflective coating comprises at least one coating layer, the coating layer at an outer of the anti-reflective coating is made of metal oxide, 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 relatively larger than sizes of the plurality of holes adjacent to an inner of the anti-reflective coating;
wherein a refractive index of the optical lens element comprising the anti-reflective coating is Ns, the coating layer at the innermost of the anti-reflective coating is a first coating layer, a refractive index of the first coating layer is N1, a thickness of the first coating layer is TL1, a super-wide field of wavelength factor of the optical lens assembly as arranging the anti-reflective coating is Farw, Farw=((N1−Ns)/(N1+Ns))2, an average of tangent slopes in an optical effective diameter region of a surface of the optical lens element comprising the anti-reflective coating is SPavg, a minimum of the tangent slopes in the optical effective diameter region of the surface of the optical lens element comprising the anti-reflective coating is SPmin, a second anti-reflective coating arranging factor of the optical lens assembly is Far2, Far2=1/(|SPavg|×|SPmin|), and the following conditions are satisfied:
N1<Ns;
50 nm≤TL1≤200 nm;
Farw≤0.60; and
0.100≤Far2.