# US 10,310,225 B2 · Wide-angle lens > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,310,225 B2 - Document ID: US10310225B2 - Status: Granted - Kind: B2 - Application number: 15/431,806 - Filed: 2017-02-14 - Published: 2017-08-31 - Granted: 2019-06-04 - Earliest claimed: 2016-02-26 - Assignees: Aoe Optronics (Shenzhen) Co., Ltd.; AOE Optronics Co., Inc. - Applicants: Aoe Optronics (Shenzhen) Co., Ltd.; Aoe Optronics Co., Inc. - Inventors: Po-Yuan Shih - Web page: https://patentgrep.com/patent/US10310225B2 ## CPC - G02B 13/0045: {having five or more lenses} - G02B 9/64: having more than six components - G02B 13/009: {having zoom function} - G02B 13/06: Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A wide-angle lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, all of which are arranged in sequence from an object side to an image side along an optical axis. The first lens is a convex-concave lens with negative refractive power and includes a convex surface facing the object side and a concave surface facing the image side. The second lens is a biconcave lens with negative refractive power. The third lens is a biconvex lens with positive refractive power. The fourth lens includes a convex surface facing the object side. The fifth lens is with positive refractive power and includes a convex surface facing the image side. The sixth lens is a biconvex lens with positive refractive power. The seventh lens is a biconcave lens with negative refractive power. The eighth lens is a biconvex lens with positive refractive power. ## Claims ### Claim 1 A wide-angle lens, in sequence from an object side to an image side along an optical axis, comprising: a first lens having negative refractive power; a second lens including a concave surface facing the object side and having negative refractive power; a third lens having positive refractive power; a fourth lens, having a negative refractive power, including a convex surface and facing the object side; a fifth lens having positive refractive power, wherein the fourth lens and the fifth lens are cemented to form a cemented lens; a sixth lens having positive refractive power; a seventh lens having negative refractive power, and an eighth lens is a biconvex lens having positive refractive power. ### Claim 2 (depends on 1) The wide-angle lens as claimed in claim 1, wherein the first lens is a meniscus lens and includes a convex surface facing the object side and a concave surface facing the image side. ### Claim 3 (depends on 1) The wide-angle lens as claimed in claim 1, wherein the second lens is a biconcave lens. ### Claim 4 (depends on 3) The wide-angle lens as claimed in claim 3, wherein the third lens is a biconvex lens. ### Claim 5 (depends on 3) The wide-angle lens as claimed in claim 3, wherein the sixth lens is a biconvex lens. ### Claim 6 (depends on 1) The wide-angle lens as claimed in claim 1, wherein the fifth lens includes a convex surface facing the image side. ### Claim 7 (depends on 1) The wide-angle lens as claimed in claim 1, wherein the seventh lens is a biconcave lens. ### Claim 8 (depends on 6) The wide-angle lens as claimed in claim 6, wherein the sixth lens and the seventh lens are cemented to form a cemented lens. ### Claim 9 (depends on 6) The wide-angle lens as claimed in claim 6, wherein the fourth lens satisfies: −20≤f4/f≤20 wherein f4 is an effective focal length of the fourth lens, f is an effective focal length of the wide-angle lens. ### Claim 10 (depends on 7) The wide-angle lens as claimed in claim 7, wherein the sixth lens and the seventh lens are cemented to form a cemented lens. ### Claim 11 (depends on 1) The wide-angle lens as claimed in claim 1, wherein the sixth lens and the seventh lens satisfies: −30≤f67/f≤−5 wherein f67 is an effective focal length of a cemented lens that is cemented the sixth lens and the seventh lens, f is an effective focal length of the wide-angle lens. ### Claim 12 (depends on 1) The wide-angle lens as claimed in claim 1, wherein the fourth lens satisfies: 5≤Vd4/Nd4≤50 wherein Vd4 is an Abbe number of the fourth lens, Nd4 is a refractive index of the fourth lens. ### Claim 13 (depends on 1) The wide-angle lens as claimed in claim 1, wherein the seventh lens satisfies: −110≤(R71−R72)/(R71+R72)≤−1 wherein R71 is a radius of curvature of the object side of the seventh lens, R72 is a radius of curvature of the image side of the seventh lens. ### Claim 14 (depends on 1) The wide-angle lens as claimed in claim 1, wherein a stop and is interposed between the third lens and the fourth lens. ### Claim 15 (depends on 1) The wide-angle lens as claimed in claim 1, wherein the surfaces of the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens at least one is an aspheric surface. ### Claim 16 A wide-angle lens, in sequence from an object side to an image side along an optical axis, comprising; a first lens having negative refractive power; a second lens including a concave surface facing the object side and having negative refractive power; a third lens having positive refractive power; a fourth lens, having a negative refractive power, including a convex surface and facing the object side; a fifth lens having positive refractive power; a sixth lens having positive refractive power; a seventh lens having negative refractive power; an eighth lens is a biconvex lens having positive refractive power; wherein the fourth lens satisfies: 5≤Vd4/Nd4≤50, wherein Vd4 is an Abbe number of the fourth lens, Nd4 is a refractive index of the fourth lens. ### Claim 17 A wide-angle lens, in sequence from an object side to an image side along an optical axis, comprising: a first lens having negative refractive power; a second lens including a concave surface facing the object side and having negative refractive power; a third lens having positive refractive power; a fourth lens, having a negative refractive power, including a convex surface and facing the object side; a fifth lens having positive retractive power, wherein the fourth lens and the fifth lens are cemented to form a cemented lens; a sixth lens having positive refractive power; a seventh lens having negative refractive power, and an eighth lens having positive refractive power; wherein the sixth lens and the seventh lens satisfies: −30≤f67/f≤−5 wherein f67 is an effective focal length of a cemented lens that is cemented the sixth lens and the seventh lens, f is an effective focal length of the wide-angle lens. ### Claim 18 (depends on 16) The wide-angle lens as claimed in claim 16, wherein the fourth lens satisfies: −20≤f4/f≤20 wherein f4 is an effective focal length of the fourth lens, f is an effective focal length of the wide-angle lens. ### Claim 19 (depends on 16) The wide-angle lens as claimed in claim 16, wherein the seventh lens satisfies: −110≤(R71 −R72)/(R71 +R72)≤−1 wherein R71 is a radius of curvature of the object side of the seventh lens, R72 is a radius of curvature of the image side of the seventh lens.