US 12,216,332 B2
Imaging lens assembly and electronic device
Chien-Pang Chang, Taichung (TW); Wen-Yu Tsai, Taichung (TW); Lin-An Chang, Taichung (TW); Ming-Ta Chou, 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. 8, 2021, as Appl. No. 17/545,001.
Claims priority of provisional application 63/129,833, filed on Dec. 23, 2020.
Prior Publication US 2022/0196969 A1, Jun. 23, 2022
Int. Cl. G02B 9/04 (2006.01); C23C 16/40 (2006.01); G02B 1/04 (2006.01); G02B 1/11 (2015.01); G02B 3/04 (2006.01)
CPC G02B 9/04 (2013.01) [C23C 16/40 (2013.01); G02B 1/041 (2013.01); G02B 1/11 (2013.01); G02B 3/04 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An imaging lens assembly, having an optical axis, comprising:
a plastic lens element set, comprising:
two plastic lens elements, in order from an object side to an image side along the optical axis being a first plastic lens element and a second plastic lens element; and
at least one anti-reflective layer, having a nanostructure, and disposed on at least one of an image-side surface of the first plastic lens element and an object-side surface of the second plastic lens element;
wherein a central distance between a paraxial region of the image-side surface of the first plastic lens element and a paraxial region of the object-side surface of the second plastic lens element is d, a minimum air gap between an off-axis region of the image-side surface of the first plastic lens element and an off-axis region of the object-side surface of the second plastic lens element is AG1, a peripheral air gap between an edge of an optical effective region of the image-side surface of the first plastic lens element and an edge of an optical effective region of the object-side surface of the second plastic lens element is AG2, the minimum air gap is formed on the at least one anti-reflective layer, a grain height of the nanostructure is gH, and the following conditions are satisfied:
65 nm<gH<600 nm;
0.001≤AG1/d<0.7; and
0.01<AG1/AG2<0.9.