Dual-molded circular optical element, imaging lens assembly, imaging device, and electronic device
AssigneeLargan Precision Co., Ltd.
InventorsMing-Ta Chou, Cheng-Feng Lin
Life of this patent
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Abstract
The present disclosure provides a dual-molded circular optical element including an outer plastic peripheral portion and an inner sheet portion. The outer plastic peripheral portion locates at an outer annular surface of the circular optical element. The inner sheet portion is enclosed in the outer plastic peripheral portion, and the inner sheet portion forms a minimal central opening of the circular optical element. Two sides of the outer plastic peripheral portion are disposed with a flat plane, and each of the flat planes is perpendicular to a central axis of the circular optical element.
Claims18
A dual-molded optical element, comprising:
- an outer plastic peripheral portion, having an outer annular surface of the dual-molded optical element;
- and
- an inner sheet portion, enclosed in the outer plastic peripheral portion, and the inner sheet portion forms a central opening, wherein a central axis of the dual-molded optical element runs through a center of the central opening in a direction perpendicular to the opening of the dual-molded circular optical element;
- wherein two sides of the outer plastic peripheral portion are respectively disposed with at least one flat plane, and each of the flat planes is perpendicular to the central axis of the dual-molded optical element;
- wherein one of the flat planes contacts a tapered portion disposed on the outer plastic peripheral portion and located contacting one side of the inner sheet portion, the tapered portion tapers towards the central opening;
- wherein distances between a central cross-sectional plane of the inner sheet portion and the flat planes of the two sides are t1 and t2, and the following condition is satisfied:
- 0.2<t1/t2<5.0;
- wherein the inner sheet portion comprises an object-end surface facing an object-end direction and an image-end surface facing an image-end direction, the object-end surface of the inner sheet portion has a first gloss and the image-end surface of the inner sheet portion has a second gloss, wherein the first gloss is different from the second gloss.
Dependencies are inferred from the claim text.