VCSEL pair used as optical pointers in a contact lens for gaze tracking and visual target designation
We present a new eye-tracking and target designation device based on a contact lens incorporating a pair of vertical-cavity surface-emitting lasers (VCSELs). We describe the operating principle, the manufacturing process and characterize the impact of the VCSELs encapsulation on their optical proper...
Gespeichert in:
| Veröffentlicht in: | PloS one 2022-07, Vol.17 (7), p.e0267393-e0267393 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | e0267393 |
|---|---|
| container_issue | 7 |
| container_start_page | e0267393 |
| container_title | PloS one |
| container_volume | 17 |
| creator | Robert, François-Maël Nourrit, Vincent Adam, Laure de Bougrenet de la Tocnaye, Jean-Louis |
| description | We present a new eye-tracking and target designation device based on a contact lens incorporating a pair of vertical-cavity surface-emitting lasers (VCSELs). We describe the operating principle, the manufacturing process and characterize the impact of the VCSELs encapsulation on their optical properties. We then describe how such device can be incorporated into an eye-wear or a visual augmented system. We compare two different detection set-ups, the first using a camera and the second a position sensitive device, both illustrating different laser beam detection modes. We analyze their performances in terms of angular accuracy, speed, compactness, manufacturability, compared to current conventional eye-tracking systems. We emphasize how the use of two VCSELs and the control of their orientation during the encapsulation can simplify their integration in host systems and improve the gaze detection performance. Finally, we describe various embodiments and discuss potential improvements that can be expected in future systems. |
| doi_str_mv | 10.1371/journal.pone.0267393 |
| format | Article |
| fullrecord | <record><control><sourceid>gale_plos_</sourceid><recordid>TN_cdi_plos_journals_2688057387</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><galeid>A709862470</galeid><doaj_id>oai_doaj_org_article_06b155973b304f9c9f55565c4e5ff382</doaj_id><sourcerecordid>A709862470</sourcerecordid><originalsourceid>FETCH-LOGICAL-c703t-27c11b48e40dd9d8d40a62e458155652fcc21ecaf149654834bec558b13c76223</originalsourceid><addsrcrecordid>eNqNk9-L1DAQx4so3rn6HwgGBPEedk2aH21fhGU5vYWFA0_vNaTptJu1m-wl7aL-9aZuletxD9KHlulnvpP5ZiZJXhO8IDQjH3au91a1i4OzsMCpyGhBnyTnpKDpXKSYPr33fZa8CGGHMae5EM-TM8pzIljGzxO4Xd1cbtBBGY_6ABVSAblDZ7Rq0cEZ24EPyFikkHa2U7pDLdiAaudRo34B6rzS341tkLIVOprQx7xO-QY6VEEwjVWdcfZl8qxWbYBX43uWfPt0-XV1Nd9cf16vlpu5zjDt5mmmCSlZDgxXVVHlFcNKpMDiaTkXPK21TgloVRNWCM5yykrQnOcloToTaUpnyZuT7qF1QY4OBZmKPMc8o3kWifWJqJzayYM3e-V_SqeM_BNwvpHKx_ZbkFiUsWyR0ZJiVhe6qPlwCs2A1zXNh2ofx2p9uYdKg41utBPR6R9rtrJxR1mkGcWCRIGLk8D2QdrVciOHGKZFxgnDx4F9Pxbz7q6H0Mm9CRraVllw_dhjzikXEX37AH3ciZFqVGzW2NoNdzmIymWGi1ykLF7KLFk8QsWngr2JIwG1ifFJwsUkYRgb-NE1qg9Brm--_D97fTtl391jt6Dabhtc2w_jFaYgO4HauxA81P-cJVgOm_PXDTlsjhw3h_4Gq7IHCg</addsrcrecordid><sourcetype>Open Website</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2688057387</pqid></control><display><type>article</type><title>VCSEL pair used as optical pointers in a contact lens for gaze tracking and visual target designation</title><source>DOAJ Directory of Open Access Journals</source><source>Public Library of Science (PLoS) Journals Open Access</source><source>EZB-FREE-00999 freely available EZB journals</source><source>PubMed Central</source><source>Free Full-Text Journals in Chemistry</source><creator>Robert, François-Maël ; Nourrit, Vincent ; Adam, Laure ; de Bougrenet de la Tocnaye, Jean-Louis</creator><contributor>Wu, Xuejian</contributor><creatorcontrib>Robert, François-Maël ; Nourrit, Vincent ; Adam, Laure ; de Bougrenet de la Tocnaye, Jean-Louis ; Wu, Xuejian</creatorcontrib><description>We present a new eye-tracking and target designation device based on a contact lens incorporating a pair of vertical-cavity surface-emitting lasers (VCSELs). We describe the operating principle, the manufacturing process and characterize the impact of the VCSELs encapsulation on their optical properties. We then describe how such device can be incorporated into an eye-wear or a visual augmented system. We compare two different detection set-ups, the first using a camera and the second a position sensitive device, both illustrating different laser beam detection modes. We analyze their performances in terms of angular accuracy, speed, compactness, manufacturability, compared to current conventional eye-tracking systems. We emphasize how the use of two VCSELs and the control of their orientation during the encapsulation can simplify their integration in host systems and improve the gaze detection performance. Finally, we describe various embodiments and discuss potential improvements that can be expected in future systems.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0267393</identifier><identifier>PMID: 35816475</identifier><language>eng</language><publisher>San Francisco: Public Library of Science</publisher><subject>Accuracy ; Analysis ; Antennas ; Biology and Life Sciences ; Contact lenses ; Encapsulation ; Engineering and Technology ; Engineering Sciences ; Evaluation ; Eye ; Eye movements ; Gaze ; Host systems ; Laser beams ; Lasers ; Manufacturability ; Manufacturing industry ; Medicine and Health Sciences ; Movements ; Optical properties ; Orientation ; Orientation behavior ; Position sensing ; Power ; Tracking ; Tracking devices ; Tracking systems ; Vertical cavity surface emission lasers</subject><ispartof>PloS one, 2022-07, Vol.17 (7), p.e0267393-e0267393</ispartof><rights>COPYRIGHT 2022 Public Library of Science</rights><rights>2022 Robert et al. This is an open access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><rights>2022 Robert et al 2022 Robert et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c703t-27c11b48e40dd9d8d40a62e458155652fcc21ecaf149654834bec558b13c76223</citedby><cites>FETCH-LOGICAL-c703t-27c11b48e40dd9d8d40a62e458155652fcc21ecaf149654834bec558b13c76223</cites><orcidid>0000-0002-1949-2207</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC9273061/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC9273061/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,864,885,2102,2928,23866,27924,27925,53791,53793,79600,79601</link.rule.ids><backlink>$$Uhttps://hal.science/hal-03975140$$DView record in HAL$$Hfree_for_read</backlink></links><search><contributor>Wu, Xuejian</contributor><creatorcontrib>Robert, François-Maël</creatorcontrib><creatorcontrib>Nourrit, Vincent</creatorcontrib><creatorcontrib>Adam, Laure</creatorcontrib><creatorcontrib>de Bougrenet de la Tocnaye, Jean-Louis</creatorcontrib><title>VCSEL pair used as optical pointers in a contact lens for gaze tracking and visual target designation</title><title>PloS one</title><description>We present a new eye-tracking and target designation device based on a contact lens incorporating a pair of vertical-cavity surface-emitting lasers (VCSELs). We describe the operating principle, the manufacturing process and characterize the impact of the VCSELs encapsulation on their optical properties. We then describe how such device can be incorporated into an eye-wear or a visual augmented system. We compare two different detection set-ups, the first using a camera and the second a position sensitive device, both illustrating different laser beam detection modes. We analyze their performances in terms of angular accuracy, speed, compactness, manufacturability, compared to current conventional eye-tracking systems. We emphasize how the use of two VCSELs and the control of their orientation during the encapsulation can simplify their integration in host systems and improve the gaze detection performance. Finally, we describe various embodiments and discuss potential improvements that can be expected in future systems.</description><subject>Accuracy</subject><subject>Analysis</subject><subject>Antennas</subject><subject>Biology and Life Sciences</subject><subject>Contact lenses</subject><subject>Encapsulation</subject><subject>Engineering and Technology</subject><subject>Engineering Sciences</subject><subject>Evaluation</subject><subject>Eye</subject><subject>Eye movements</subject><subject>Gaze</subject><subject>Host systems</subject><subject>Laser beams</subject><subject>Lasers</subject><subject>Manufacturability</subject><subject>Manufacturing industry</subject><subject>Medicine and Health Sciences</subject><subject>Movements</subject><subject>Optical properties</subject><subject>Orientation</subject><subject>Orientation behavior</subject><subject>Position sensing</subject><subject>Power</subject><subject>Tracking</subject><subject>Tracking devices</subject><subject>Tracking systems</subject><subject>Vertical cavity surface emission lasers</subject><issn>1932-6203</issn><issn>1932-6203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>DOA</sourceid><recordid>eNqNk9-L1DAQx4so3rn6HwgGBPEedk2aH21fhGU5vYWFA0_vNaTptJu1m-wl7aL-9aZuletxD9KHlulnvpP5ZiZJXhO8IDQjH3au91a1i4OzsMCpyGhBnyTnpKDpXKSYPr33fZa8CGGHMae5EM-TM8pzIljGzxO4Xd1cbtBBGY_6ABVSAblDZ7Rq0cEZ24EPyFikkHa2U7pDLdiAaudRo34B6rzS341tkLIVOprQx7xO-QY6VEEwjVWdcfZl8qxWbYBX43uWfPt0-XV1Nd9cf16vlpu5zjDt5mmmCSlZDgxXVVHlFcNKpMDiaTkXPK21TgloVRNWCM5yykrQnOcloToTaUpnyZuT7qF1QY4OBZmKPMc8o3kWifWJqJzayYM3e-V_SqeM_BNwvpHKx_ZbkFiUsWyR0ZJiVhe6qPlwCs2A1zXNh2ofx2p9uYdKg41utBPR6R9rtrJxR1mkGcWCRIGLk8D2QdrVciOHGKZFxgnDx4F9Pxbz7q6H0Mm9CRraVllw_dhjzikXEX37AH3ciZFqVGzW2NoNdzmIymWGi1ykLF7KLFk8QsWngr2JIwG1ifFJwsUkYRgb-NE1qg9Brm--_D97fTtl391jt6Dabhtc2w_jFaYgO4HauxA81P-cJVgOm_PXDTlsjhw3h_4Gq7IHCg</recordid><startdate>20220711</startdate><enddate>20220711</enddate><creator>Robert, François-Maël</creator><creator>Nourrit, Vincent</creator><creator>Adam, Laure</creator><creator>de Bougrenet de la Tocnaye, Jean-Louis</creator><general>Public Library of Science</general><general>Public Library of Science (PLoS)</general><scope>AAYXX</scope><scope>CITATION</scope><scope>IOV</scope><scope>ISR</scope><scope>3V.</scope><scope>7QG</scope><scope>7QL</scope><scope>7QO</scope><scope>7RV</scope><scope>7SN</scope><scope>7SS</scope><scope>7T5</scope><scope>7TG</scope><scope>7TM</scope><scope>7U9</scope><scope>7X2</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8C1</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>H94</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB.</scope><scope>KB0</scope><scope>KL.</scope><scope>L6V</scope><scope>LK8</scope><scope>M0K</scope><scope>M0S</scope><scope>M1P</scope><scope>M7N</scope><scope>M7P</scope><scope>M7S</scope><scope>NAPCQ</scope><scope>P5Z</scope><scope>P62</scope><scope>P64</scope><scope>PATMY</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>RC3</scope><scope>7X8</scope><scope>1XC</scope><scope>5PM</scope><scope>DOA</scope><orcidid>https://orcid.org/0000-0002-1949-2207</orcidid></search><sort><creationdate>20220711</creationdate><title>VCSEL pair used as optical pointers in a contact lens for gaze tracking and visual target designation</title><author>Robert, François-Maël ; Nourrit, Vincent ; Adam, Laure ; de Bougrenet de la Tocnaye, Jean-Louis</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c703t-27c11b48e40dd9d8d40a62e458155652fcc21ecaf149654834bec558b13c76223</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Accuracy</topic><topic>Analysis</topic><topic>Antennas</topic><topic>Biology and Life Sciences</topic><topic>Contact lenses</topic><topic>Encapsulation</topic><topic>Engineering and Technology</topic><topic>Engineering Sciences</topic><topic>Evaluation</topic><topic>Eye</topic><topic>Eye movements</topic><topic>Gaze</topic><topic>Host systems</topic><topic>Laser beams</topic><topic>Lasers</topic><topic>Manufacturability</topic><topic>Manufacturing industry</topic><topic>Medicine and Health Sciences</topic><topic>Movements</topic><topic>Optical properties</topic><topic>Orientation</topic><topic>Orientation behavior</topic><topic>Position sensing</topic><topic>Power</topic><topic>Tracking</topic><topic>Tracking devices</topic><topic>Tracking systems</topic><topic>Vertical cavity surface emission lasers</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Robert, François-Maël</creatorcontrib><creatorcontrib>Nourrit, Vincent</creatorcontrib><creatorcontrib>Adam, Laure</creatorcontrib><creatorcontrib>de Bougrenet de la Tocnaye, Jean-Louis</creatorcontrib><collection>CrossRef</collection><collection>Gale In Context: Opposing Viewpoints</collection><collection>Gale In Context: Science</collection><collection>ProQuest Central (Corporate)</collection><collection>Animal Behavior Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Biotechnology Research Abstracts</collection><collection>Nursing & Allied Health Database</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Immunology Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Nucleic Acids Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Agricultural Science Collection</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Public Health Database</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Materials Science Database</collection><collection>Nursing & Allied Health Database (Alumni Edition)</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>ProQuest Engineering Collection</collection><collection>ProQuest Biological Science Collection</collection><collection>Agricultural Science Database</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biological Science Database</collection><collection>Engineering Database</collection><collection>Nursing & Allied Health Premium</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environmental Science Database</collection><collection>Materials Science Collection</collection><collection>Access via ProQuest (Open Access)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>Environmental Science Collection</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Robert, François-Maël</au><au>Nourrit, Vincent</au><au>Adam, Laure</au><au>de Bougrenet de la Tocnaye, Jean-Louis</au><au>Wu, Xuejian</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>VCSEL pair used as optical pointers in a contact lens for gaze tracking and visual target designation</atitle><jtitle>PloS one</jtitle><date>2022-07-11</date><risdate>2022</risdate><volume>17</volume><issue>7</issue><spage>e0267393</spage><epage>e0267393</epage><pages>e0267393-e0267393</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>We present a new eye-tracking and target designation device based on a contact lens incorporating a pair of vertical-cavity surface-emitting lasers (VCSELs). We describe the operating principle, the manufacturing process and characterize the impact of the VCSELs encapsulation on their optical properties. We then describe how such device can be incorporated into an eye-wear or a visual augmented system. We compare two different detection set-ups, the first using a camera and the second a position sensitive device, both illustrating different laser beam detection modes. We analyze their performances in terms of angular accuracy, speed, compactness, manufacturability, compared to current conventional eye-tracking systems. We emphasize how the use of two VCSELs and the control of their orientation during the encapsulation can simplify their integration in host systems and improve the gaze detection performance. Finally, we describe various embodiments and discuss potential improvements that can be expected in future systems.</abstract><cop>San Francisco</cop><pub>Public Library of Science</pub><pmid>35816475</pmid><doi>10.1371/journal.pone.0267393</doi><tpages>e0267393</tpages><orcidid>https://orcid.org/0000-0002-1949-2207</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1932-6203 |
| ispartof | PloS one, 2022-07, Vol.17 (7), p.e0267393-e0267393 |
| issn | 1932-6203 1932-6203 |
| language | eng |
| recordid | cdi_plos_journals_2688057387 |
| source | DOAJ Directory of Open Access Journals; Public Library of Science (PLoS) Journals Open Access; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry |
| subjects | Accuracy Analysis Antennas Biology and Life Sciences Contact lenses Encapsulation Engineering and Technology Engineering Sciences Evaluation Eye Eye movements Gaze Host systems Laser beams Lasers Manufacturability Manufacturing industry Medicine and Health Sciences Movements Optical properties Orientation Orientation behavior Position sensing Power Tracking Tracking devices Tracking systems Vertical cavity surface emission lasers |
| title | VCSEL pair used as optical pointers in a contact lens for gaze tracking and visual target designation |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-29T21%3A26%3A13IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-gale_plos_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=VCSEL%20pair%20used%20as%20optical%20pointers%20in%20a%20contact%20lens%20for%20gaze%20tracking%20and%20visual%20target%20designation&rft.jtitle=PloS%20one&rft.au=Robert,%20Fran%C3%A7ois-Ma%C3%ABl&rft.date=2022-07-11&rft.volume=17&rft.issue=7&rft.spage=e0267393&rft.epage=e0267393&rft.pages=e0267393-e0267393&rft.issn=1932-6203&rft.eissn=1932-6203&rft_id=info:doi/10.1371/journal.pone.0267393&rft_dat=%3Cgale_plos_%3EA709862470%3C/gale_plos_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2688057387&rft_id=info:pmid/35816475&rft_galeid=A709862470&rft_doaj_id=oai_doaj_org_article_06b155973b304f9c9f55565c4e5ff382&rfr_iscdi=true |