Low total track length lens assembly including seven lenses of +−+−++− refractive powers for large sensor format
AssigneeCorephotonics Ltd.
InventorsRoy Rudnick, Michael Dror, Ephraim Goldenberg
Life of this patent
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Abstract
Lens assemblies comprising from an object side to an image side, seven lens elements numbered L1-L7; an optical window; and an image sensor having a sensor diagonal length (SDL), wherein an exemplary lens assembly has a total track length TTL that includes the optical window an effective focal length EFL and a field of view (FOV), wherein TTL/EFL<1.100, wherein TTL/SDL<0.64, wherein FOV<90 degrees, wherein a normalized thickness standard deviation constant T_STD of at least four of the seven lens elements complies with T_STD<0.035, and wherein a focal length f1 of lens element L1 fulfills f1/EFL<0.95.
Claims19
A lens assembly comprising:
- from an object side to an image side,
- seven lens elements numbered L1-L7;
- an optical window;
- and
- an image sensor having a sensor diagonal length SDL,
- wherein the lens assembly has a total track length TTL, an effective focal length EFL, a field of view FOV<90 degrees and a f number f/#<1.9, wherein TTL/SDL<0.64, wherein lens element L1 is convex on the object side, wherein the seven lens elements are all made of plastic, and wherein a power sign sequence of the seven lens elements numbered L1-L7 is +−+−++−.
Dependencies are inferred from the claim text.