US 12,405,411 B2
Optical lens assembly, imaging apparatus and electronic device
Pei-Chi Chang, Taichung (TW); Hung-Shuo Chen, Taichung (TW); and Chun-Hung Teng, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Nov. 24, 2021, as Appl. No. 17/534,564.
Claims priority of provisional application 63/118,030, filed on Nov. 25, 2020.
Claims priority of application No. 110137381 (TW), filed on Oct. 7, 2021.
Prior Publication US 2022/0163710 A1, May 26, 2022
Int. Cl. G02B 5/20 (2006.01); G02B 7/02 (2021.01); G02B 13/14 (2006.01); H04N 23/54 (2023.01)
CPC G02B 5/208 (2013.01) [G02B 7/021 (2013.01); G02B 13/14 (2013.01); H04N 23/54 (2023.01)] 25 Claims
OG exemplary drawing
 
1. An optical lens assembly, comprising:
at least three optical lens elements;
wherein at least one of the optical lens elements comprises an infrared filtering coating, the optical lens element comprising the infrared filtering coating is made of a plastic material, the infrared filtering coating is arranged on an object-side surface or an image-side surface of the optical lens element, a surface of the optical lens element comprising the infrared filtering coating is aspheric, and the infrared filtering coating comprises at least two different refractive indices;
wherein at least one of the optical lens elements comprises a long-wavelength absorbing material, and the optical lens element comprising the long-wavelength absorbing material is made of a plastic material;
wherein a maximum of an incident angle of a chief ray in all fields on the surface of the optical lens element comprising the infrared filtering coating is AICmax, an average transmittance between a wavelength of 500 nm-600 nm of the optical lens assembly is T5060, an average transmittance between a wavelength of 700 nm-1000 nm of the optical lens assembly is T70100, and the following conditions are satisfied:
AICmax≤40 degrees;
80%≤T5060; and
T70100≤10%;
wherein a major coating arranging factor of each of surfaces of the optical lens elements is FC, and at least one of the surfaces of the optical lens element comprising the infrared filtering coating satisfies the following condition:
0.96≤FC.