# US 12,181,636 B2 · 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 12,181,636 B2 - Document ID: US12181636B2 - Status: Granted - Kind: B2 - Application number: 17/226,111 - Filed: 2021-04-09 - Published: 2021-10-21 - Granted: 2024-12-31 - Earliest claimed: 2020-04-10 - Assignees: Zhejiang Sunny Optics Co., Ltd. - Applicants: Zhejiang Sunny Optics Co., Ltd. - Inventors: Jianke Wenren; Fujian Dai; Liefeng Zhao - Web page: https://patentgrep.com/patent/US12181636B2 ## CPC - G02B 13/0045: {having five or more lenses} - G02B 5/04: Prisms - G02B 9/60: having five components only - G02B 13/0065: {having a beam-folding prism or mirror} - 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 - G03B 30/00: Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles - G03B 2205/0046: Movement of one or more optical elements for zooming - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract The disclosure discloses an optical imaging system, which includes: a lens group, sequentially including, from an object side to an image side along a first direction, a first lens, a second lens, a third lens, a fourth lens and a fifth lens with refractive power; a first prism, arranged on the object side of the lens group and configured to reflect light incident into the first prim along a second direction to be emergent from the first prism along the first direction; and a second prism, arranged on the image side of the lens group and configured to reflect light incident into the second prism along the first direction to be emergent from the second prism along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to one another; at least one lens in the lens group is a plastic lens. ## Claims ### Claim 1 An optical imaging system, comprising: a lens group, sequentially comprising, from an object side to an image side along a first direction, a first lens, a second lens, a third lens, a fourth lens and a fifth lens with refractive power; wherein a first prism, arranged on the object side of the lens group and configured to reflect light incident into the first prism along a second direction to be emergent from the first prism along the first direction; and a second prism, arranged on the image side of the lens group and configured to reflect light incident into the second prism along the first direction to be emergent from the second prism along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to one another, at least one lens in the lens group is a plastic lens, and at least one surface of the plastic lens is an aspherical surface, the first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, the fourth lens has positive refractive power, and the fifth lens has negative refractive power; and a total effective focal length f of the optical imaging system meets 20 mm