# US 2024/0201472 A1 · Optical imaging system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201472 A1 - Document ID: US20240201472A1 - Status: Published application - Kind: A1 - Application number: 18/489,427 - Filed: 2023-10-18 - Published: 2024-06-20 - Earliest claimed: 2022-12-14 - Assignees: Samsung Electro-Mechanics Co., Ltd. - Applicants: Samsung Electro-Mechanics Co., Ltd. - Inventors: Han Ul YOUN; Ji Su LEE; Dong Hyuk JANG - Web page: https://patentgrep.com/patent/US20240201472A1 ## CPC - G02B 9/64: having more than six components - G02B 13/0045: {having five or more lenses} - 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 imaging system is provided. The optical imaging system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, sequentially arranged from an object side toward an image plane, wherein the optical imaging system satisfies the following conditional expressions [(1) TTL/2IMH<0.6, and (1) Fno<1.72, where TTL is a distance from an object side surface of the first lens to the image plane, 2IMH is a diagonal length of the image plane, and Fno is an F number of the optical imaging system. ## Claims ### Claim 1 An optical imaging system, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, sequentially arranged from an object side toward an image plane, wherein the optical imaging system satisfies the following conditional expressions: TTL / 2 ⁢ IMH < 0.6 , and ( 1 ) Fno < 1.72 , ( 2 ) where TTL is a distance from an object side surface of the first lens to the image plane, 2IMH is a maximum effective image height of the image plane, and Fno is an F number of the optical imaging system. ### Claim 2 (depends on 1) The optical imaging system of claim 1, wherein the first lens has positive refractive power, wherein the second lens has negative refractive power, and wherein the sixth lens has negative refractive power. ### Claim 3 (depends on 1) The optical imaging system of claim 1, wherein an object side surface of any one of the fourth lens or the fifth lens has a concave shape in a paraxial region. ### Claim 4 (depends on 1) The optical imaging system of claim 1, wherein the following conditional expression is satisfied: 2.3 < T ⁢ 1 / T ⁢ 9 < 3.8 , where T1 is an optical axis thickness of the first lens, and T9 is an optical axis thickness of the ninth lens. ### Claim 5 (depends on 1) The optical imaging system of claim 1, wherein the following conditional expression is satisfied: 1.7 < TTL / ∑ CT < 1.9 , where TTL is a distance from an object side surface of the first lens to the image plane, and ΣCT is a sum of optical axis thicknesses of the first lens to the ninth lens. ### Claim 6 (depends on 1) The optical imaging system of claim 1, wherein the following conditional expression is satisfied: 2.5 < TTL / ∑ AT < 2.8 , where TTL is a distance from an object side surface of the first lens to the image plane, and ΣAT is a sum of optical axis intervals of the first lens to the ninth lens. ### Claim 7 (depends on 1) The optical imaging system of claim 1, wherein the following conditional expression is satisfied: - 6 < f ⁢ 2 / f < - 2 , where f2 is a focal length of the second lens, and f is a focal length of the optical imaging system. ### Claim 8 (depends on 1) The optical imaging system of claim 1, wherein the seventh lens and the eighth lens have a convex object side surface and a concave image side surface. ### Claim 9 (depends on 1) The optical imaging system of claim 1, wherein the following conditional expression is satisfied: 9 < v ⁢ 1 / f ⁢ 1 < 11 , where v1 is Abbe number of the first lens, and f1 is a focal length of the first lens. ### Claim 10 (depends on 1) The optical imaging system of claim 1, wherein the following conditional expression is satisfied: 11 < Fno * ⁢ TTL < 12 , where Fno is an F number of the optical imaging system, and TTL is a distance from an object side surface of the first lens to the image plane. ### Claim 11 An optical imaging system, comprising: a first lens having positive refractive power; a second lens having negative refractive power; a third lens having refractive power; a fourth lens having a concave object side surface; a fifth lens having refractive power; a sixth lens having negative refractive power; a seventh lens having refractive power, and having a convex object side surface and a concave image side surface; an eighth lens having positive refractive power; and a ninth lens having negative refractive power, wherein the first lens to the ninth lens are sequentially arranged from an object side toward an image plane, and wherein the optical imaging system satisfies the following conditional expression: Fno < 1.72 , where Fno is an F number of the optical imaging system. ### Claim 12 (depends on 11) The optical imaging system of claim 11, wherein the following conditional expression is satisfied: 1.4 < ∑ CT / ∑ AT < 1.6 , where ΣCT is a sum of optical axis thicknesses of the first lens to the ninth lens, and ΣAT is a sum of optical axis intervals of the first lens to the ninth lens. ### Claim 13 (depends on 11) The optical imaging system of claim 11, wherein the following conditional expression is satisfied: FOV * ⁢ IMH / f < 97 , where FOV is an angle of view of the optical imaging system, IMH is ½ of a diagonal length of the image plane, and f is a focal length of the optical imaging system. ### Claim 14 (depends on 11) The optical imaging system of claim 11, wherein the following conditional expression is satisfied: 18 < v ⁢ 1 - v ⁢ 5 < 31 , where v1 is Abbe number of the first lens, and v5 is Abbe number of the fifth lens. ### Claim 15 (depends on 11) The optical imaging system of claim 11, wherein the following conditional expression is satisfied: TTL / 2 ⁢ IMH < 0.6 , where TTL is a distance from an object side surface of the first lens to the image plane, and 2IMH is a diagonal length of the image plane. ### Claim 16 (depends on 11) The optical imaging system of claim 11, wherein the following conditional expression is satisfied: 2.3 < T ⁢ 1 / T ⁢ 9 < 3.8 , where T1 is an optical axis thickness of the first lens, and T9 is an optical axis thickness of the ninth lens. ### Claim 17 An optical imaging system, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens, sequentially arranged from an object side toward an image plane, wherein the optical imaging system satisfies the following conditional expressions: TTL / 2 ⁢ IMH < 0.6 , and ( 1 ) 2.5 < TTL / ∑ AT < 2.8 , ( 2 ) where TTL is a distance from an object side surface of the first lens to the image plane, 2IMH is a diagonal length of the image plane, and ΣAT is a sum of optical axis intervals of the first lens to the ninth lens.