# US 11,442,251 B2 · Optical lens assembly and imaging device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,251 B2 - Document ID: US11442251B2 - Status: Granted - Kind: B2 - Application number: 16/730,241 - Filed: 2019-12-30 - Published: 2020-05-28 - Granted: 2022-09-13 - Earliest claimed: 2018-11-28 - Assignees: Ningbo Sunny Automotive Optech Co., Ltd. - Applicants: Ningbo Sunny Automotive Optech Co., Ltd. - Inventors: Qiansen Xie; Bo Yao; Xiang Li - Web page: https://patentgrep.com/patent/US11442251B2 ## CPC - G02B 13/0045: {having five or more lenses} - G02B 13/00: Optical objectives specially designed for the purposes specified below (with variable magnification {in general} G02B15/00) - G02B 13/006: {at least one element being a compound optical element, e.g. cemented elements} - G02B 13/02: Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length - G02B 13/06: Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces} - G02B 3/02: with non-spherical faces (G02B3/10 takes precedence) - G02B 5/005: {Diaphragms (for cameras G03B9/02)} - G02B 9/62: having six components only - G02B 13/002: {having at least one aspherical surface} - G02B 13/04: Reversed telephoto objectives - G02B 13/18: with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An optical lens assembly and an imaging device including the optical lens assembly are disclosed. The optical lens assembly may include, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens may have a negative refractive power; the second lens may have a positive refractive power; the third lens may have a positive refractive power; the fourth lens may have a negative refractive power, an object-side surface thereof is a convex surface and an image-side surface thereof is a concave surface; the fifth lens may have a positive refractive power, and both of an object-side surface and an image-side surface thereof are convex surfaces; and the sixth lens may have a negative refractive power. ## Claims ### Claim 1 An optical lens assembly, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are sequentially arranged from an object side of the optical lens assembly to an image side of the optical lens assembly along an optical axis of the optical lens assembly, wherein, the first lens has a negative refractive power, and both of an object-side surface and an image-side surface of the first lens are concave surfaces; the second lens has a positive refractive power, an object-side surface of the second lens is a concave surface and an image-side surface of the second lens is a convex surface; the third lens has a positive refractive power, and both of an object-side surface and an image-side surface of the third lens are convex surfaces; the fourth lens has a negative refractive power, an object-side surface of the fourth lens is a convex surface and an image-side surface of the fourth lens is a concave surface; the fifth lens has a positive refractive power, and both of an object-side surface and an image-side surface of the fifth lens are convex surfaces; and the sixth lens has a negative refractive power. ### Claim 2 (depends on 1) The optical lens assembly according to claim 1, wherein a paraxial area of an object-side surface of the sixth lens is convex, and the object-side surface of the sixth lens has at least one inflection point. ### Claim 3 (depends on 1) The optical lens assembly according to claim 1, wherein a paraxial area of an image-side surface of the sixth lens is concave, and the image-side surface of the sixth lens has at least one inflection point. ### Claim 4 (depends on 1) The optical lens assembly according to claim 1, wherein the fourth lens and the fifth lens are cemented together to form a cemented lens. ### Claim 5 (depends on 1) The optical lens assembly according to claim 1, wherein the optical lens assembly satisfies: TTL/F≤7.5, where TTL is a total track length of the optical lens assembly and F is a total focal length of the optical lens assembly. ### Claim 6 (depends on 1) The optical lens assembly according to claim 1, wherein the optical lens assembly satisfies: D/H/FOV≤0.02, where FOV is a maximum field-of-view of the optical lens assembly, D is a maximum effective aperture radius of the object-side surface of the first lens corresponding to the maximum field-of-view of the optical lens assembly and H is an image height corresponding to the maximum field-of-view of the optical lens assembly. ### Claim 7 (depends on 1) The optical lens assembly according to claim 1, wherein the optical lens assembly satisfies: (FOV×F)/H≥60, where FOV is a maximum field-of-view of the optical lens assembly, F is a total focal length of the optical lens assembly and H is an image height corresponding to the maximum field-of-view of the optical lens assembly. ### Claim 8 (depends on 1) The optical lens assembly according to claim 1, wherein the optical lens assembly satisfies: |F4/F3|≤2, where F4 is a focal length of the fourth lens and F3 is a focal length of the third lens. ### Claim 9 (depends on 1) The optical lens assembly according to claim 1, wherein the optical lens assembly satisfies: 2≤F45/F≤5, where F45 is a combined focal length of the fourth lens and the fifth lens and F is a total focal length of the optical lens assembly. ### Claim 10 (depends on 1) An imaging device, comprising the optical lens assembly of claim 1 and an imaging element for converting an optical image formed by the optical lens assembly into an electrical signal. ### Claim 11 An optical lens assembly, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens, which are sequentially arranged from an object side of the optical lens assembly to an image side of the optical lens assembly along an optical axis of the optical lens assembly, wherein, the first lens has a negative refractive power; the third lens has a positive refractive power; an object-side surface of the second lens is a concave surface and an image-side surface of the second lens is a convex surface; an object-side surface of the fourth lens is a convex surface; the fourth lens and the fifth lens are cemented together to form a cemented lens; and the optical lens assembly satisfies: TTL/F≤7.5; and (FOV×F)/H≥60, where TTL is a total track length of the optical lens assembly, F is a total focal length of the optical lens assembly, FOV is a maximum field-of-view of the optical lens assembly, and H is an image height corresponding to the maximum field-of-view of the optical lens assembly. ### Claim 12 (depends on 11) The optical lens assembly according to claim 11, wherein both of an object-side surface and an image-side surface of the first lens are concave surfaces. ### Claim 13 (depends on 11) The optical lens assembly according to claim 11, wherein both of an object-side surface and an image-side surface of the third lens are convex surfaces. ### Claim 14 (depends on 11) The optical lens assembly according to claim 11, an image-side surface of the fourth lens is a concave surface. ### Claim 15 (depends on 11) The optical lens assembly according to claim 11, wherein both of an object-side surface and an image-side surface of the fifth lens are convex surfaces. ### Claim 16 (depends on 11) The optical lens assembly according to claim 11, wherein a paraxial area of an object-side surface of the sixth lens is convex, and the object-side surface of the sixth lens has at least one inflection point. ### Claim 17 (depends on 11) The optical lens assembly according to claim 11, wherein a paraxial area of an image-side surface of the sixth lens is concave, and the image-side surface of the sixth lens has at least one inflection point. ### Claim 18 (depends on 11) The optical lens assembly according to claim 11, wherein the optical lens assembly satisfies: D/H/FOV≤0.02, where FOV is a maximum field-of-view of the optical lens assembly, D is a maximum effective aperture radius of the object-side surface of the first lens corresponding to the maximum field-of-view of the optical lens assembly and H is an image height corresponding to the maximum field-of-view of the optical lens assembly. ### Claim 19 (depends on 11) The optical lens assembly according to claim 11, wherein the optical lens assembly satisfies: |F4/F3|≤2, where F4 is a focal length of the fourth lens and F3 is a focal length of the third lens. ### Claim 20 (depends on 11) The optical lens assembly according to claim 11, wherein the optical lens assembly satisfies: 2≤F45/F≤5, where F45 is a combined focal length of the fourth lens and the fifth lens and F is the total focal length of the optical lens assembly.