# US 2020/0288117 A1 · Resolution test chart and artificial eye for assessing fundus imaging systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288117 A1 - Document ID: US20200288117A1 - Status: Published application - Kind: A1 - Application number: 16/808,300 - Filed: 2020-03-03 - Published: 2020-09-10 - Earliest claimed: 2019-03-04 - Assignees: Nikon Corporation - Applicants: Nikon Corporation - Inventors: Wan Qin; Brian Stamper - Web page: https://patentgrep.com/patent/US20200288117A1 ## CPC - H04N 17/002: {for television cameras} - A61B 3/0025: {characterised by electronic signal processing, e.g. eye models} - G06V 40/193: {Preprocessing; Feature extraction} - G09B 23/30: Anatomical models {(G09B23/281 - G09B23/288 take precedence)} - A61B 3/12: for looking at the eye fundus, e.g. ophthalmoscopes (A61B3/13 takes precedence) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - G09B: EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B) ## Abstract An assessment assembly (10) for assessing a fundus imaging system (12) includes at least one, curved, flexible resolution test chart (40). Each of the resolution test charts (40) can include a chart body (342), and a plurality of spaced apart chart features (344). Moreover, each of the resolution test charts (40) can be fixedly coupled to an artificial retina region (36) of an artificial eye (14). The artificial retina region (36) can be shaped and sized similar to a retina region (19E) of a human eye (19), and the artificial retina region (36) can have scattering and depolarization properties that are similar to the scattering and depolarization properties of the retina region (19E) of the human eye (19). The fundus imaging system (12) can capture one or more images (20) of the resolution test charts (40) that are evaluated to determine a resolution of the fundus imaging system (12). ## Claims ### Claim 1 An assessment assembly for assessing a fundus imaging system, the assessment assembly comprising: at least one, flexible, resolution test chart attached onto a curved surface, wherein each of the at least one resolution test charts includes a chart body and at least one chart feature; and an analysis system that analyzes information from at least one image captured of the resolution test chart by the fundus imaging system to assess a resolution of the fundus imaging system. ### Claim 2 (depends on 1) The assessment assembly of claim 1 wherein the curved surface is a curved retina region of an artificial eye, and at least one of the resolution test charts is attached onto the curved retina region. ### Claim 3 (depends on 2) The assessment assembly of claim 2 wherein the curved retina region has scattering and depolarization properties that are similar to the scattering and depolarization properties of a human eye. ### Claim 4 (depends on 2) The assessment assembly of claim 2 wherein the at least one of the resolution test charts is coupled to an ultra-widefield portion of the retina region of the artificial eye. ### Claim 5 (depends on 1) The assessment assembly of claim 1 further comprising a fundus imaging system that captures at least one image of the flexible resolution test chart. ### Claim 6 (depends on 1) The assessment assembly of claim 1 wherein each of the at least one resolution test charts has an elasticity of less than 1.2 mega pascal. ### Claim 7 (depends on 1) The assessment assembly of claim 1 wherein each of the at least one resolution test charts has a chart surface area of less than fifty millimeters squared. ### Claim 8 (depends on 1) The assessment assembly of claim 1 wherein each of the at least one resolution test charts has a plurality of spaced apart chart features, wherein at least two of the chart features has a different feature width. ### Claim 9 (depends on 8) The assessment assembly of claim 8 wherein for each of the at least one resolution test charts, each chart feature has a ring shape. ### Claim 10 (depends on 9) The assessment assembly of claim 9 wherein for each of the at least one resolution test charts, the chart features are substantially concentric. ### Claim 11 (depends on 1) The assessment assembly of claim 1 further comprising at least two resolution test charts that are spaced apart. ### Claim 12 (depends on 1) The assessment assembly of claim 1 further comprising at least two resolution test charts with the same chart features, wherein one of the resolution test chart is attached onto a central part of the curved region, and the other resolution chart is attached onto peripheral part of the curved region. ### Claim 13 A method for assessing a fundus imaging system, the method comprising: providing an artificial eye that includes a curved retina region to which at least one, flexible, resolution test charts is coupled, each of the at least resolution test charts including at least one chart feature; capturing at least one image of the curved retina region including the at least one resolution test chart with the fundus imaging system; and assessing a resolution of the fundus imaging system by analyzing the image. ### Claim 14 (depends on 13) The method of claim 13 wherein the step of coupling includes coupling the at least one resolution test chart to an ultra-widefield portion of the retina region of the artificial eye. ### Claim 15 An artificial eye that mimics a human eye, comprising: a curved, artificial retina region wherein at least one flexible resolution test charts is coupled to the curved retina region, wherein each of the at least one resolution test charts includes a chart body and at least one chart feature. ### Claim 16 (depends on 15) The artificial eye of claim 15 wherein the artificial retina region has scattering and depolarization properties that are similar to the scattering and depolarization properties of the human eye. ### Claim 17 (depends on 15) The artificial eye of claim 15 wherein at least one of the resolution test charts is coupled to an ultra-widefield portion of the retina region of the artificial eye. ### Claim 18 (depends on 15) The artificial eye of claim 15 wherein the curved retina region has a depolarization power that is within sixty percent of a depolarization power of a retina of the human eye. ### Claim 19 (depends on 15) The artificial eye of claim 15 wherein the curved retina region is made of a polydimethylsiloxane and titanium dioxide mixture. ### Claim 20 (depends on 15) A fundus imaging system comprising: an imaging unit that may capture at least one image of the flexible resolution test chart that is attached onto the artificial retina region of claim 15; and an analysis system that analyzes information from at least one image captured of the resolution test chart by comparing to the information from the images to the known resolution test charts to assess a resolution of the fundus imaging system.