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

Claim 0:
1. 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 dMAX is larger than 2.25 times any other gap between lens elements, 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.