# US 12,601,655 B2 · Resolution detection device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,601,655 B2 - Document ID: US12601655B2 - Status: Granted - Kind: B2 - Application number: 18/736,543 - Filed: 2024-06-07 - Published: 2024-12-12 - Granted: 2026-04-14 - Earliest claimed: 2023-06-09 - Assignees: Vivotek Inc. - Applicants: Vivotek Inc. - Inventors: Chung-Kai Chang - Web page: https://patentgrep.com/patent/US12601655B2 ## CPC - G01M 11/0207: {Details of measuring devices} - H04N 17/002: {for television cameras} - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A resolution detection device is applied to a camera device and includes at least one arc-shaped structural member and an identification member. The at least one arc-shaped structural member is disposed on a position distant from a detection point in a predefined distance. The identification member includes a plurality of identification patterns. The identification member is formed on the at least one arc-shaped structural member, and a plurality of intervals between the detection point and each of the plurality of identification patterns is set as the predefined distance. The camera device acquires a captured image via the detection point, and the captured image contains the plurality of identification patterns. The resolution detection device further includes a relay lens disposed on the detection point. ## Claims ### Claim 1 A resolution detection device applied to a camera device, the resolution detection device comprising: at least one arc-shaped structural member, position of the at least one arc-shaped structural member reaching a predefined distance relative to a detection point; and an identification member formed on the at least one arc-shaped structural member and comprising a plurality of identification patterns, a plurality of intervals respectively between the plurality of identification patterns and the detection point being equal to the predefined distance; wherein the camera device acquires a captured image through the detection point, and the captured image contains at least parts of the plurality of identification patterns; wherein the resolution detection device further comprises an operation processor electrically connected with the camera device, and adapted to search the plurality of identification patterns in the captured image of the camera device via triangulation technology and further utilize boundaries of the plurality of identification patterns to compute a spatial frequency response value. ### Claim 2 (depends on 1) The resolution detection device of claim 1, wherein the camera device is assembly comprising a relay lens disposed on the detection point and a camera lens disposed adjacent to the relay lens, or the camera lens disposed on a long range detection point. ### Claim 3 (depends on 1) The resolution detection device of claim 1, wherein each of the plurality of identification patterns at least comprises a first boundary and a second boundary, an angle difference between a right angle and an included angle between the first boundary and the second boundary is smaller than a predefined value. ### Claim 4 (depends on 1) The resolution detection device of claim 1, wherein each of the plurality of identification patterns is one or a combination of two intersecting straight lines, a triangle, a polygon and a sector that have a right angle. ### Claim 5 (depends on 1) The resolution detection device of claim 1, wherein the plurality of identification patterns is continuously arranged in a structurally longitudinal direction of the arc-shaped structural member. ### Claim 6 (depends on 2) The resolution detection device of claim 2, wherein an arc length formed by a distribution range of the plurality of identification patterns on the arc-shaped structural member is a computation value of the predefined distance and a maximal field of view of the relay lens. ### Claim 7 (depends on 1) The resolution detection device of claim 1, wherein the at least one arc-shaped structural member comprises a first section and a second section connected with each other, the plurality of identification patterns is distributed on the first section, the second section is set at a predefined angle relative to the first section so as to fix a position of the at least one arc-shaped structural member relative to the camera device. ### Claim 8 (depends on 1) The resolution detection device of claim 1, wherein the at least one arc-shaped structural member is an X-shaped structure, or the resolution detection device comprises two arc-shaped structural members intersected with each other. ### Claim 9 (depends on 2) The resolution detection device of claim 2, wherein the resolution detection device further comprises a backlight plate disposed on a position of the at least one arc-shaped structural member relative to the camera device. ### Claim 10 (depends on 9) The resolution detection device of claim 9, wherein a width of the backlight plate is a computation value of a maximal field of view of the relay lens and an interval distance between the backlight plate and the relay lens. ### Claim 11 (depends on 9) The resolution detection device of claim 9, wherein two ends of a projected pattern of the at least one arc-shaped structural member projected onto the backlight plate respectively correspond to two relative corners of the captured image of the camera device, and a center point of the projected pattern aligns with a center point of the captured image. ### Claim 12 (depends on 9) The resolution detection device of claim 9, wherein a first auxiliary line of the backlight plate corresponds to a first diagonal line of the captured image with a wide aspect ratio, a second auxiliary line of the backlight plate corresponds to a second diagonal line of the captured image with a standard aspect ratio, a plurality of projection positions of the plurality of identification patterns projected onto the backlight plate is overlapped with the first auxiliary line and the second auxiliary line. ### Claim 13 (depends on 1) The resolution detection device of claim 1, wherein the plurality of identification patterns is formed on the identification member in a non-overlapped manner or in a partly overlapped manner. ### Claim 14 (depends on 1) The resolution detection device of claim 1, wherein the at least one arc-shaped structural member is disposed on a holder whereon the resolution detection device is installed. ### Claim 15 A resolution detection device applied to a camera device, the resolution detection device comprising: at least one arc-shaped structural member, position of the at least one arc-shaped structural member reaching a predefined distance relative to a detection point; and an identification member formed on the at least one arc-shaped structural member and comprising a plurality of identification patterns, a plurality of intervals respectively between the plurality of identification patterns and the detection point being equal to the predefined distance; wherein the camera device acquires a captured image through the detection point, and the captured image contains at least parts of the plurality of identification patterns; wherein the camera device is assembly comprising a relay lens disposed on the detection point and a camera lens disposed adjacent to the relay lens, or the camera lens disposed on a long range detection point; wherein an arc length formed by a distribution range of the plurality of identification patterns on the arc-shaped structural member is a computation value of the predefined distance and a maximal field of view of the relay lens. ### Claim 16 A resolution detection device applied to a camera device, the resolution detection device comprising: at least one arc-shaped structural member, position of the at least one arc-shaped structural member reaching a predefined distance relative to a detection point; and an identification member formed on the at least one arc-shaped structural member and comprising a plurality of identification patterns, a plurality of intervals respectively between the plurality of identification patterns and the detection point being equal to the predefined distance; wherein the camera device acquires a captured image through the detection point, and the captured image contains at least parts of the plurality of identification patterns; wherein the camera device is assembly comprising a relay lens disposed on the detection point and a camera lens disposed adjacent to the relay lens, or the camera lens disposed on a long range detection point wherein the resolution detection device further comprises a backlight plate disposed on a position of the at least one arc-shaped structural member relative to the camera device; wherein a width of the backlight plate is a computation value of a maximal field of view of the relay lens and an interval distance between the backlight plate and the relay lens.