Patent ID: 11971539
Assignee: LARGAN PRECISION CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. An imaging lens module, which is applied to an electronic device, comprising:
a plastic barrel;
an optical lens assembly disposed in the plastic barrel and comprising a plurality of lens elements; and
an annular optical element disposed in the plastic barrel and comprising:
an outer annular surface surrounding a central axis of the annular optical element;
an inner annular surface surrounding the central axis and closer to the central axis than the outer annular surface;
a first side surface connecting the outer annular surface and the inner annular surface, wherein the first side surface is connected to at least one of the lens elements;
a second side surface connecting the outer annular surface and the inner annular surface, wherein the second side surface is farther from an imaged object than the first side surface and not connected to any of the lens elements; and
a plurality of strip-shaped wedge structures disposed on the inner annular surface, wherein the annular optical element with the strip-shaped wedge structures is formed integrally, and each of the strip-shaped wedge structures is disposed along a direction from the first side surface towards the second side surface;
wherein each of the strip-shaped wedge structures comprises a tapered portion connected with the inner annular surface, and the tapered portion tapers from the inner annular surface to the central axis.