US 11,686,917 B2
Plastic lens assembly, imaging lens module and electronic device
Ming-Ta Chou, Taichung (TW); Hsiang-Chi Tang, Taichung (TW); and Tzu-Chieh Kuo, Taichung (TW)
Assigned to LARGAN PRECISION CO., LTD., Taichung (TW)
Filed by LARGAN PRECISION CO., LTD., Taichung (TW)
Filed on Jun. 24, 2022, as Appl. No. 17/848,495.
Application 17/848,495 is a continuation of application No. 16/522,843, filed on Jul. 26, 2019, granted, now 11,402,601.
Claims priority of application No. 107141532 (TW), filed on Nov. 21, 2018.
Prior Publication US 2022/0326470 A1, Oct. 13, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 7/02 (2021.01); G02B 1/04 (2006.01); G02B 13/00 (2006.01); G02B 9/64 (2006.01)
CPC G02B 7/025 (2013.01) [G02B 1/041 (2013.01); G02B 7/021 (2013.01); G02B 7/022 (2013.01); G02B 9/64 (2013.01); G02B 13/006 (2013.01); G02B 13/0045 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A plastic lens assembly, comprising:
at least two plastic lens elements comprising:
a first plastic lens element having a first optical effective portion and a first peripheral portion, wherein the first peripheral portion surrounds the first optical effective portion; and
a second plastic lens element having a second optical effective portion and a second peripheral portion, wherein the second peripheral portion surrounds the second optical effective portion; and
at least one cementing glue coating disposed between the first optical effective portion and the second optical effective portion, wherein at least one optical gap is formed between the first optical effective portion and the second optical effective portion, the cementing glue coating is farther from a center of the first optical effective portion than the optical gap is therefrom, the at least one cementing glue coating is located between the first optical effective portion of the first plastic lens element and the second optical effective portion of the second plastic lens element along a direction parallel to a central axis of the plastic assembly, and the at least one optical gap is located between the first optical effective portion of the first plastic lens element and the second optical effective portion of the second plastic lens element along the direction parallel to the central axis of the plastic assembly;
wherein a width of the optical gap close to a central axis of the plastic lens assembly is d, a maximum width of the optical gap close to the cementing glue coating is ET, a vertical distance between a position of the optical gap farthest from the central axis and the central axis is Yet, a maximum radius of the first optical effective portion of the first plastic lens element facing to the cementing glue coating is Y12, and the following conditions are satisfied:
0<ET/d<0.90; and
Yet/Y12<0.95.