US 2021/0278637 A1 · OPTICAL IMAGING SYSTEM

Abstract

The present disclosure discloses an optical imaging system including, sequentially from an object side to an image side along an optical axis, a first lens having refractive power; a second lens having negative refractive power; a third lens having negative refractive power; a fourth lens having refractive power, a convex object-side surface and a concave image-side surface; and a fifth lens having refractive power. A distance TTL along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging system and half of a diagonal length ImgH of an effective pixel area on the imaging plane of the optical imaging system satisfy: 1.0<TTL/ImgH<1.5.

Claims20

Dependent claims

An optical imaging system, sequentially from an object side to an image side of the optical imaging system along an optical axis, comprising:

a first lens having refractive power;
a second lens having negative refractive power;
a third lens having negative refractive power;
a fourth lens having refractive power, a convex object-side surface and a concave image-side surface;
and
a fifth lens having refractive power,
wherein 1.0<TTL/ImgH<1.5,
where TTL is a distance along the optical axis from an object-side surface of the first lens to an imaging plane of the optical imaging system, and ImgH is half of a diagonal length of an effective pixel area on the imaging plane of the optical imaging system.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/141,862Filed 5 Jan 2021

Priority

CN 202010149289.94 Mar 2020

Published

9 Sep 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

G02B 9/60
Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -: having five…
G02B 13/0045
Having at least one aspherical surface: having five or more lenses
G02B 27/0025
Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00: for optical correction, e.g. distorsion,…
G02B
Optical elements, systems or apparatus

Optical imaging system

Life of this patent

Optical imaging system

Life of this patent

Abstract

Claims20