US 12,436,320 B2
Imaging lens assembly, camera module and electronic device
Wen-Yu Tsai, Taichung (TW); Heng-Yi Su, Taichung (TW); Ming-Ta Chou, Taichung (TW); Chien-Pang Chang, Taichung (TW); and Kuo-Chiang Chu, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD.
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Nov. 13, 2023, as Appl. No. 18/507,164.
Application 18/507,164 is a continuation of application No. 16/935,378, filed on Jul. 22, 2020, granted, now 11,852,848.
Claims priority of provisional application 62/941,937, filed on Nov. 29, 2019.
Prior Publication US 2024/0077656 A1, Mar. 7, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 1/10 (2015.01); G02B 5/00 (2006.01); G02B 13/18 (2006.01)
CPC G02B 5/003 (2013.01) [G02B 13/18 (2013.01); G02B 2207/101 (2013.01); G02B 2207/107 (2013.01)] 34 Claims
OG exemplary drawing
 
1. An imaging lens assembly, comprising:
an optical element, which is for accommodating at least one optical lens element, comprising:
a first surface facing towards one side of an object side and an image side of the imaging lens assembly; and
a second surface facing towards the other side of the object side and the image side of the imaging lens assembly; and
a low-reflection layer located on at least one of the first surface and the second surface, and comprising:
a carbon black layer, an appearance thereof being black, and directly contacted with and connected to the at least one of the first surface and the second surface;
a nano-microstructure, being a porous structure form, directly contacted with and connected to the carbon black layer, and the nano-microstructure farther from the optical element than the carbon black layer from the optical element; and
a coating layer directly contacted with and connected to the nano-microstructure, and the coating layer farther from the optical element than the nano-microstructure from the optical element;
wherein a reflectivity of the low-reflection layer at a wavelength of 400 nm is R40, a reflectivity of the low-reflection layer at a wavelength of 800 nm is R80, and the following conditions are satisfied:
R40≤0.40%; and
R80≤0.40%.