Patent ID: 11966147
Assignee: COREPHOTONICS LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 11:
12. A lens system, comprising:
an image sensor; and
a lens distanced by a back focal length (BFL) from the image sensor and having a field of view FOV <40deg, an effective focal length (EFL) and a lens mean glass thickness (MGT), the lens including i lens elements L1-Li starting with L1 from an object side toward an image side, wherein 2≤i≤N, wherein each lens element Li has a respective thickness T, and a focal length fi, with a magnitude |fi|, wherein at least some lens elements are organized in two lens groups G1 and G2 separated by a big gap (BG) and having, respectively for G1 and G2, effective focal lengths EFL(G1) and EFL(G2), mean glass thicknesses MGT(G1) and MGT(G2) and mean air gaps MAG(G1) and MAG(G2), wherein the lens has a pop-out total track length TTL <20 mm in a pop-out state and a collapsed total track length c-TTL in a collapsed state, wherein TTL <0.95×EFL, and wherein a ratio c-TTL/TTL <0.7,
wherein a first deflection point at the rear surface of LN-1 is located at a distance d-r measured from an optical axis of the lens, and wherein d-r >1.5 mm.