Patent ID: 11953659
Assignee: COREPHOTONICS LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H  Y | IPC G  H

Claim 38:
39. A lens system, comprising:
a lens assembly that includes a plurality of refractive lens elements arranged along an optical axis and including, in order from an object side to an image side, a first group comprising a first lens element having a positive refractive power and a second lens element, and a second group comprising a first lens element and a second lens element, wherein a smallest gap between lens elements is dMIN, wherein a largest gap between lens elements dMAX is a gap between the first and second groups, wherein a ratio dMIN/dMAX<0.2, wherein at least one surface of at least one of the plurality of refractive lens elements is aspheric, wherein the lens assembly has an effective focal length EFL and a total track length TTL, a ratio TTL/EFL smaller than 1.0, and a f number f #smaller than 2.9, and wherein a center thickness of each lens element is equal to or larger than 0.2 mm;
a stop positioned before the first lens element of the first group; and
a window positioned between the plurality of refractive lens elements and an image plane,
wherein the lens system is embedded in a mobile device.