# US 2017/0285299 A1 · Optical lens > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0285299 A1 - Document ID: US20170285299A1 - Status: Published application - Kind: A1 - Application number: 15/458,068 - Filed: 2017-03-14 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: Ability Enterprise Co., Ltd. - Applicants: Ability Enterprise Co., Ltd. - Inventors: Jung-Yao Chen; Yu-Min Chang; Shuo-Hsien Cheng - Web page: https://patentgrep.com/patent/US20170285299A1 ## CPC - G02B 13/006: {at least one element being a compound optical element, e.g. cemented elements} - G02B 9/64: having more than six components - G02B 13/0045: {having five or more lenses} - G02B 13/04: Reversed telephoto objectives - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An optical lens is provided. The optical lens includes, in order from an object side to an image-forming side, a first lens having negative refractive power, a second lens having negative refractive power, a third lens having refractive power and having an Abbe number Vd3, a cemented lens having refractive power, and a fourth lens having refractive power and having an Abbe number Vd4, wherein 15≦Vd3 and/or Vd3≦30, and 60≦Vd4 and/or Vd4≦85. ## Claims ### Claim 1 An optical lens, in order from an object side to an image-forming side, at least comprising: a first lens having negative refractive power; a second lens having negative refractive power; a third lens having refractive power and having an Abbe number Vd3, and 15≦Vd3 and/or Vd3≦30; a cemented lens having refractive power; and a fourth lens having refractive power and having an Abbe number Vd4, and 60≦Vd4 and/or Vd4≦85. ### Claim 2 (depends on 1) The optical lens according to claim 1, wherein the third lens has positive refractive power and/or the fourth lens has positive refractive power. ### Claim 3 (depends on 1) The optical lens according to claim 1, wherein the cemented lens, in order from the object side to the image-forming side, at least comprises a sixth lens having negative refractive power and a seventh lens having positive refractive power; or the cemented lens, in order from the object side to the image-forming side, at least comprising a fifth lens having refractive power, a sixth lens having negative refractive power and a seventh lens having positive refractive power. ### Claim 4 (depends on 1) The optical lens according to claim 1, further comprising an eighth lens having refractive power disposed between the second lens and the third lens. ### Claim 5 (depends on 1) The optical lens according to claim 1, wherein an overall optical effect of the first lens, the second lens and the third lens is negative refractive power, and/or an overall optical effect of the cemented lens and the fourth lens is positive refractive power. ### Claim 6 An optical lens, in order from an object side to an image-forming side, at least comprising: a first lens having negative refractive power; a second lens having refractive power; a third lens having an Abbe number Vd3, the third lens is a biconvex lens, and 15≦Vd3 and/or Vd3≦30; a cemented lens having refractive power; and a fourth lens having an Abbe number Vd4, the fourth lens is a biconvex lens, and 60≦Vd4 and/or Vd4≦85. ### Claim 7 (depends on 6) The optical lens according to claim 6, wherein the cemented lens, in order from the object side to the image-forming side, at least comprises a sixth lens having negative refractive power and a seventh lens having positive refractive power; or the cemented lens, in order from the object side to the image-forming side, at least comprising a fifth lens having refractive power, a sixth lens having negative refractive power and a seventh lens having positive refractive power. ### Claim 8 (depends on 6) The optical lens according to claim 6, further comprising an eighth lens having refractive power disposed between the second lens and the third lens. ### Claim 9 (depends on 6) The optical lens according to claim 6, wherein an overall optical effect of the first lens, the second lens and the third lens is negative refractive power, and/or an overall optical effect of the cemented lens and the fourth lens is positive refractive power. ### Claim 10 An optical lens, in order from an object side to an image-forming side, at least comprising: a first lens having negative refractive power; a second lens having refractive power; a third lens having an Abbe number Vd3, and 15≦Vd3 and/or Vd3≦30; a cemented lens having refractive power; and a fourth lens having an Abbe number Vd4, and 60≦Vd4 and/or Vd4≦85; wherein the third lens has positive refractive power and/or the fourth lens has positive refractive power. ### Claim 11 (depends on 10) The optical lens according to claim 10, further comprising an imaging plane, and the optical lens satisfies at least one of the following conditions: 0≦F/TTL and F/TTL≦0.25; F is a focal length of the optical lens, and TTL is a distance between an object-side surface of the first lens and the imaging plane. ### Claim 12 (depends on 10) The optical lens according to claim 10, wherein the optical lens satisfies at least one of the following conditions: 0≦F/Y and F/Y≦1; F is a focal length of the optical lens, and Y is an image height of the optical lens. ### Claim 13 (depends on 10) The optical lens according to claim 10, wherein the optical lens satisfies at least one of the following conditions: 0≦d/F and d/F≦0.45; F is a focal length of the optical lens, and d is a distance between the third lens and the cemented lens. ### Claim 14 (depends on 10) The optical lens according to claim 10, wherein the optical lens satisfies at least one of the following conditions: 140°≦FOV and FOV≦185°; FOV is a field of view of the optical lens. ### Claim 15 (depends on 10) The optical lens according to claim 10, wherein the optical lens satisfies at least one of the following conditions: 0≦(FNO×TTL)/(FOV×Y) and (FNO×TTL)/(FOV×Y)≦0.2; FNO is an aperture of the optical lens, FOV is a field of view of the optical lens, Y is an image height of the optical lens, and TTL is a distance between an object-side surface of the first lens and an imaging plane of the optical lens. ### Claim 16 (depends on 10) The optical lens according to claim 10, wherein the optical lens satisfies at least one of the following conditions: 1.33≦D/Y and D/Y≦2.47; Y is an image height of the optical lens, and D is an effective diameter of the fourth lens. ### Claim 17 (depends on 10) The optical lens according to claim 10, wherein the cemented lens, in order from the object side to the image-forming side, comprises a sixth lens having negative refractive power and a seventh lens having positive refractive power. ### Claim 18 (depends on 17) The optical lens according to claim 17, wherein the cemented lens further comprises a fifth lens having positive refractive power disposed between the third lens and the sixth lens. ### Claim 19 (depends on 17) The optical lens according to claim 17, further comprising an eighth lens having negative refractive power disposed between the second lens and the third lens. ### Claim 20 (depends on 10) The optical lens according to claim 10, wherein an overall optical effect of the first lens, the second lens and the third lens is negative refractive power, and/or an overall optical effect of the cemented lens and the fourth lens is positive refractive power.