Optical imaging system

Patent metadata

Field	Value
Publication number	US-2026079326-A1
Application number	US-202519401803-A
Country	US
Kind code	A1
Filing date	Nov 26, 2025
Priority date	Feb 10, 2020
Publication date	Mar 19, 2026
Grant date	—

Abstract

An optical imaging system includes a first lens, a second, a third lens, a fourth lens, a fifth lens, a sixth lens, the first lens to the sixth lens being disposed in order from an object side, and a gap maintaining member disposed between one or more pairs of adjacent lenses and including a projection protruding from an internal circumferential surface in a direction intersecting an optical axis.

First claim

What is claimed is:

1 . An optical imaging system comprising:
a first lens having a refractive power and a convex object-side surface in a paraxial region thereof; a second lens having a refractive power; a third lens having a refractive power; a stop disposed between the second lens and the third lens; a fourth lens having a refractive power; a fifth lens having a refractive power; and a sixth lens having a refractive power, a concave image-side surface in a paraxial region thereof, and a focal length within a range of −110 mm to −12 mm, wherein the first lens to the sixth lens are the only lenses having a refractive power in the optical imaging system, and are sequentially disposed in ascending numerical order along an optical axis of the optical imaging system from an object side of the optical imaging system toward an imaging plane of the optical imaging system, the optical imaging system further comprises a gap maintaining member disposed between one or more pairs of adjacent lenses among the first lens to the fourth lens, and comprising a projection protruding from an internal circumferential surface of the gap maintaining member in a direction intersecting the optical axis, 1.003<LSPi/R2<1.128, where LSPi is an effective radius of an image-side surface of a lens disposed on an object side of the gap maintaining member, and R2 is a distance from the optical axis to an apex of the projection, a refractive index of the second lens is greater than a refractive index of each of the first, third, fourth, fifth, and sixth lenses, and an Abbe number of the second lens is less than 21 and less than an Abbe number of each of the first, third, fourth, fifth, and sixth lenses, and a radius of curvature of the object-side surface of the first lens is greater than a radius of curvature of an object-side surface of the third lens.

2 . The optical imaging system of claim 1 , wherein the projection has a wave shape or a sawtooth shape.

3 . The optical imaging system of claim 1 , wherein the projection is any one of a plurality of projections numbering 50 or more to less than 200 each protruding from the internal circumferential surface of the gap maintaining member in a direction intersecting the optical axis.

4 . The optical imaging system of claim 1 , wherein the distance R2 from the optical axis to the projection is smaller than an effective radius of the lens disposed on the object side of the gap maintaining member.

5 . The optical imaging system of claim 1 , wherein a sign of a refractive power of the lens disposed on the object side of the gap maintaining member is different from a sign of a refractive power of a lens disposed on an image side of the gap maintaining member.

6 . The optical imaging system of claim 1 , wherein a shape of the image-side surface of the lens disposed on the object side of the gap maintaining member is different from a shape of an object-side surface of a lens disposed on an image side of the gap maintaining member.

7 . The optical imaging system of claim 1 , wherein 0.1<CT3/TTL, where CT3 is a thickness of the third lens along the optical axis, and TTL is a distance along the optical axis from the object-side surface of the first lens to the imaging plane.

8 . The optical imaging system of claim 1 , wherein f3/f<2.0, where f is a focal length of the optical imaging system, and f3 is a focal length of the third lens.

9 . The optical imaging system of claim 1 , wherein 0.005 mm<LSPi−R2<0.100 mm.

Assignees

• Samsung Electro Mech

Inventors

• Yoo Ho Sik

Classifications

• G02B13/0045 Primary

  having five or more lenses · CPC title

• G02B13/18

  with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G03B17/12

  with means for supporting objectives, supplementary lenses, filters, masks, or turrets · CPC title

• G02B9/62 Primary

  having six components only · CPC title