Patent ID: 11867877
Assignee: LARGAN PRECISION CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC G

Claim 6:
7. The lens module of claim 1, wherein a number of the at least one L-shaped annular groove is at least two, the at least two L-shaped annular grooves comprise an object-side L-shaped annular groove located closest to the object-side surface and an image-side L-shaped annular groove located closest to the image-side surface, a bottom diameter of the object-side L-shaped annular groove is φ1, a bottom diameter of the image-side L-shaped annular groove is φ2, a diameter of the outer surface is φo, a diameter of the inner surface is φi, and the following condition is satisfied:

0.05<(φ2−φ1)/(φo−φi)<0.55.