Patent ID: 11927725
Assignee: GENIUS ELECTRONIC OPTICAL (XIAMEN) CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical imaging lens, from an object side to an image side in order along an optical axis comprising: a first lens element, a second lens element, a third lens element, and a fourth lens element, each of the first lens element to the fourth lens element having an object-side surface facing toward the object side and allowing imaging rays to pass through as well as an image-side surface facing toward the image side and allowing the imaging rays to pass through, wherein:
an optical axis region of the object-side surface of the first lens element is convex; and
an optical axis region of the object-side surface of the second lens element is convex;
wherein lens elements included by the optical imaging lens are only the four lens elements described above;, wherein HFOV stands for a half field of view of the optical imaging lens, TTL is a distance from the object-side surface of the first lens element to an image plane along the optical axis, TL is a distance from the object-side surface of the first lens element to the image-side surface of the fourth lens element along the optical axis, T2 is a thickness of the second lens element along the optical axis, G12 is an air gap between the first lens element and the second lens element along the optical axis, G23 is an air gap between the second lens element and the third lens element along the optical axis, and BFL is a distance from the image-side surface of the fourth lens element to the image plane along the optical axis, and the optical imaging lens satisfies the relationship: HFOV≤15.000°, 3.000≤TL/(G12+T2+G23) and TTL/BFL≤3.500.