	US 12,298,538 B2
	Miniature optical lens assembly having optical element, imaging apparatus and electronic device
Kuo-Chiang Chu, Taichung (TW); Chien-Pang Chang, Taichung (TW); Chun-Hung Teng, Taichung (TW); and Wen-Yu Tsai, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Aug. 3, 2021, as Appl. No. 17/392,391.
Application 17/392,391 is a continuation of application No. 16/699,224, filed on Nov. 29, 2019, granted, now 11,112,542.
Claims priority of provisional application 62/773,250, filed on Nov. 30, 2018.
Prior Publication US 2021/0364674 A1, Nov. 25, 2021
Int. Cl. G02B 1/11 (2015.01); G02B 5/00 (2006.01); G02B 13/00 (2006.01)

CPC G02B 5/003 (2013.01) [G02B 13/001 (2013.01)]

18 Claims

1. A miniature optical lens assembly, which has at least one optical element, comprising:

the optical element, comprising:

a low reflection layer disposed on at least one surface of the optical element, wherein the low reflection layer comprises:

a plurality of nanocrystalline grains located on one surface of the low reflection layer;

wherein the nanocrystalline grains are made of silicon dioxide (SiO₂) or aluminium oxide (Al₂O₃);

wherein an average diameter of the nanocrystalline grains is DC, a reflectance in a wavelength range of 450 nm-650 nm of the low reflection layer is R4565, and the following conditions are satisfied:

109 nm≤DC≤219 nm; and

R4565≤0.89%.