# US 10,845,571 B2 · Optical lens > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,845,571 B2 - Document ID: US10845571B2 - Status: Granted - Kind: B2 - Application number: 16/009,651 - Filed: 2018-06-15 - Published: 2019-09-12 - Granted: 2020-11-24 - Earliest claimed: 2018-03-09 - Assignees: Rays Optics Inc. - Applicants: Rays Optics Inc. - Inventors: Ying-Hsiu Lin; Ching-Sheng Chang; Chen-Cheng Lee; Kuo-Chuan Wang - Web page: https://patentgrep.com/patent/US10845571B2 ## CPC - G02B 9/62: having six components only - G02B 9/64: having more than six components - G02B 13/18: with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} - G02B 5/005: {Diaphragms (for cameras G03B9/02)} - G02B 13/002: {having at least one aspherical surface} - G02B 13/0045: {having five or more lenses} - G02B 13/04: Reversed telephoto objectives - G02B 13/06: Panoramic objectives; So-called "sky lenses" {including panoramic objectives having reflecting surfaces} - G02B 27/0025: {for optical correction, e.g. distorsion, aberration} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract An optical lens includes a first lens group and a second lens group arranged in order from a first side to a second side, and an aperture stop disposed between the first lens group and the second lens group. The optical lens satisfies the condition of LT/IMH<4.7, where IMH is semi-diagonal image height on an image plane, and LT is a distance along an optical axis between a surface of a first lens of the first lens group facing the first side and a surface of a last lens of the second lens group facing the second side. The first lens is closest to the first side among the first lens group, and the last lens is closest to the second side among the second lens group. ## Claims ### Claim 1 An optical lens, comprising: a first lens group and a second lens group arranged in order from a first side to a second side; an aperture stop disposed between the first lens group and the second lens group, the optical lens having at least six lenses and at most nine lenses with refractive powers, a full field of view of 160 degrees to 180 degrees, and an entrance pupil diameter of greater than 2 mm, and the optical lens satisfying the condition: LT/IMH<4.7, where IMH is semi-diagonal image height on an image plane that equals half of an image circle, LT is a distance along an optical axis between a surface of a first lens of the first lens group facing the first side and a surface of a last lens of the second lens group facing the second side, the first lens is closest to the first side among the first lens group, and the last lens is closest to the second side among the second lens group. ### Claim 2 (depends on 1) The optical lens as claimed in claim 1, wherein a surface of a second lens facing the second side is a concave surface, with the second lens being designated in order from the first side. ### Claim 3 (depends on 1) The optical lens as claimed in claim 1, wherein the second lens group has an aspheric lens. ### Claim 4 (depends on 1) The optical lens as claimed in claim 1, wherein the second lens group has a triplet lens. ### Claim 5 (depends on 1) The optical lens as claimed in claim 1, wherein the first lens group comprises three lenses with refractive powers, and the second lens group comprises at least three and at most four lenses with refractive powers. ### Claim 6 (depends on 1) The optical lens as claimed in claim 1, wherein the second lens group comprises at least one doublet lens. ### Claim 7 (depends on 1) The optical lens as claimed in claim 1, wherein a minimum distance between two lenses of the second lens group along an optical axis is smaller than 0.05 mm. ### Claim 8 (depends on 1) The optical lens as claimed in claim 1, wherein the second lens group has at least one lens with an Abbe number of greater than 60. ### Claim 9 (depends on 1) The optical lens as claimed in claim 1, wherein the optical lens satisfies one of the following conditions: (1) the optical lens comprises seven lenses having respective refractive powers of negative, negative, positive, positive, positive, negative and positive; (2) the optical lens comprises seven lenses having respective refractive powers of negative, negative, positive, negative, positive, negative and positive; (3) the optical lens comprises six lenses having respective refractive powers of negative, negative, positive, positive, negative and positive. ### Claim 10 (depends on 1) The optical lens as claimed in claim 1, wherein the optical lens satisfies one of the following conditions: (1) the optical lens comprises seven lenses having respective shapes of meniscus, biconcave, biconvex, meniscus, biconvex, meniscus and biconvex; (2) the optical lens comprises seven lenses having respective shapes of meniscus, meniscus, biconvex, meniscus, biconvex, meniscus and meniscus; (3) the optical lens comprises seven lenses having respective shapes of meniscus, biconcave, meniscus, aspherical, plano-convex, meniscus and biconvex; (4) the optical lens comprises six lenses having respective shapes of meniscus, biconcave, biconvex, aspherical, meniscus and biconvex; (5) the optical lens comprises six lenses having respective shapes of meniscus, biconcave, biconvex, biconvex, meniscus and aspherical. ### Claim 11 (depends on 1) The optical lens as claimed in claim 1, wherein an F-number of the optical lens is smaller than or equal to 1.9. ### Claim 12 An optical lens, comprising: a first lens group, an aperture stop and a second lens group arranged in order from a magnified side to a minified side, the first lens group having a negative refractive power, the second lens group having a positive refractive power, the optical lens having at least six lenses and at most nine lenses with refractive powers, and the optical lens satisfying the conditions: 1.9