{"id":"https://openalex.org/W7203884151","doi":"https://doi.org/10.1117/12.3102318","title":"Manufacturing the ELT M5 blank mirror: a world of challenges","display_name":"Manufacturing the ELT M5 blank mirror: a world of challenges","publication_year":2026,"publication_date":"2026-08-21","ids":{"openalex":"https://openalex.org/W7203884151","doi":"https://doi.org/10.1117/12.3102318"},"language":"en","primary_location":{"id":"doi:10.1117/12.3102318","doi":"https://doi.org/10.1117/12.3102318","is_oa":false,"landing_page_url":"https://doi.org/10.1117/12.3102318","pdf_url":null,"source":{"id":"https://openalex.org/S4363605714","display_name":"Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VII","raw_type":"proceedings-article"},"volume":null,"type":"conference-abstract","is_traditional":false,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5043935092","display_name":"Florent Mallet","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210101217","display_name":"Mersen (France)","ror":"https://ror.org/017sazg79","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210101217"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Florent Mallet","raw_affiliation_strings":["Mersen Boostec (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mersen Boostec (France)","institution_ids":["https://openalex.org/I4210101217"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5119096961","display_name":"Jean-Marc Boitrel","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210101217","display_name":"Mersen (France)","ror":"https://ror.org/017sazg79","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210101217"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Jean-Marc Boitrel","raw_affiliation_strings":["Mersen Boostec (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mersen Boostec (France)","institution_ids":["https://openalex.org/I4210101217"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5060106816","display_name":"Marc Ferrato","orcid":"https://orcid.org/0000-0001-7354-2642","observed_orcids":["https://orcid.org/0000-0001-7354-2642"]},"institutions":[{"id":"https://openalex.org/I4210101217","display_name":"Mersen (France)","ror":"https://ror.org/017sazg79","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210101217"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Marc Ferrato","raw_affiliation_strings":["Mersen Boostec (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mersen Boostec (France)","institution_ids":["https://openalex.org/I4210101217"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5115574621","display_name":"Alexandra Guggenheim","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210101217","display_name":"Mersen (France)","ror":"https://ror.org/017sazg79","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210101217"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Alexandra Guggenheim","raw_affiliation_strings":["Mersen Boostec (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mersen Boostec (France)","institution_ids":["https://openalex.org/I4210101217"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5085301167","display_name":"Pablo Lefevre","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210101217","display_name":"Mersen (France)","ror":"https://ror.org/017sazg79","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210101217"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Pablo Lefevre","raw_affiliation_strings":["Mersen Gennevilliers (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mersen Gennevilliers (France)","institution_ids":["https://openalex.org/I4210101217"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5147770351","display_name":"Alexandre Potier","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210101217","display_name":"Mersen (France)","ror":"https://ror.org/017sazg79","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210101217"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Alexandre Potier","raw_affiliation_strings":["Mersen Gennevilliers (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Mersen Gennevilliers (France)","institution_ids":["https://openalex.org/I4210101217"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5059317619","display_name":"Constanza Araujo Hauck","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1321434546","display_name":"European Southern Observatory","ror":"https://ror.org/01qtasp15","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1321434546"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Constanza Araujo Hauck","raw_affiliation_strings":["European Southern Observatory (ESO) (Germany)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"European Southern Observatory (ESO) (Germany)","institution_ids":["https://openalex.org/I1321434546"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5022808609","display_name":"Marc Cayrel","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1321434546","display_name":"European Southern Observatory","ror":"https://ror.org/01qtasp15","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1321434546"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Marc Cayrel","raw_affiliation_strings":["European Southern Observatory (ESO) (Germany)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"European Southern Observatory (ESO) (Germany)","institution_ids":["https://openalex.org/I1321434546"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5073101619","display_name":"Elise Vernet","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1321434546","display_name":"European Southern Observatory","ror":"https://ror.org/01qtasp15","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1321434546"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Elise Vernet","raw_affiliation_strings":["European Southern Observatory (ESO) (Germany)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"European Southern Observatory (ESO) (Germany)","institution_ids":["https://openalex.org/I1321434546"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053804471","display_name":"Pablo Zuluaga-Ram\u00edrez","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1321434546","display_name":"European Southern Observatory","ror":"https://ror.org/01qtasp15","country_code":"DE","type":"facility","lineage":["https://openalex.org/I1321434546"]}],"countries":["DE"],"is_corresponding":false,"raw_author_name":"Pablo Zuluaga Ramirez","raw_affiliation_strings":["European Southern Observatory (ESO) (Germany)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"European Southern Observatory (ESO) (Germany)","institution_ids":["https://openalex.org/I1321434546"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5147697575","display_name":"Fabien Ciapponi","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210165303","display_name":"Safran (France)","ror":"https://ror.org/05sqf9v67","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210165303"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Fabien Ciapponi","raw_affiliation_strings":["Safran Reosc (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Safran Reosc (France)","institution_ids":["https://openalex.org/I4210165303"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5028398023","display_name":"Claire Lamour","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210165303","display_name":"Safran (France)","ror":"https://ror.org/05sqf9v67","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210165303"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Claire Lamour","raw_affiliation_strings":["Safran Reosc (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Safran Reosc (France)","institution_ids":["https://openalex.org/I4210165303"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5057092175","display_name":"Elodie Milhiet","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I4210165303","display_name":"Safran (France)","ror":"https://ror.org/05sqf9v67","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210165303"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Elodie Milhiet","raw_affiliation_strings":["Safran Reosc (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Safran Reosc (France)","institution_ids":["https://openalex.org/I4210165303"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5062366954","display_name":"Xavier P. Tonnellier","orcid":"https://orcid.org/0000-0002-0826-5017","observed_orcids":["https://orcid.org/0000-0002-0826-5017"]},"institutions":[{"id":"https://openalex.org/I4210165303","display_name":"Safran (France)","ror":"https://ror.org/05sqf9v67","country_code":"FR","type":"company","lineage":["https://openalex.org/I4210165303"]}],"countries":["FR"],"is_corresponding":false,"raw_author_name":"Xavier Tonnellier","raw_affiliation_strings":["Safran Reosc (France)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Safran Reosc (France)","institution_ids":["https://openalex.org/I4210165303"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"8","last_page":"8"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11484","display_name":"Adaptive optics and wavefront sensing","score":0.8095999956130981,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11484","display_name":"Adaptive optics and wavefront sensing","score":0.8095999956130981,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12917","display_name":"Astronomy and Astrophysical Research","score":0.1720999926328659,"subfield":{"id":"https://openalex.org/subfields/3105","display_name":"Instrumentation"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11517","display_name":"Advanced optical system design","score":0.0032999999821186066,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/extremely-large-telescope","display_name":"Extremely Large Telescope","score":0.9850000143051147},{"id":"https://openalex.org/keywords/silicon-carbide-mirrors","display_name":"silicon carbide mirrors","score":0.8230000138282776},{"id":"https://openalex.org/keywords/tip-tilt-mirror","display_name":"tip-tilt mirror","score":0.9660000205039978},{"id":"https://openalex.org/keywords/deformable-mirror","display_name":"deformable mirror","score":0.7089999914169312},{"id":"https://openalex.org/keywords/chemical-vapor-deposition","display_name":"chemical vapor deposition","score":0.5619999766349792},{"id":"https://openalex.org/keywords/brazing","display_name":"brazing","score":0.8140000104904175},{"id":"https://openalex.org/keywords/mirror-fabrication","display_name":"mirror fabrication","score":0.7940000295639038},{"id":"https://openalex.org/keywords/polishing","display_name":"polishing","score":0.39100000262260437},{"id":"https://openalex.org/keywords/adaptive-optics","display_name":"adaptive optics","score":0.47200000286102295}],"concepts":[{"id":"https://openalex.org/C2778089247","wikidata":"https://www.wikidata.org/wiki/Q368951","display_name":"Blank","level":2,"score":0.765999972820282},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.557699978351593},{"id":"https://openalex.org/C117671659","wikidata":"https://www.wikidata.org/wiki/Q11049265","display_name":"Manufacturing engineering","level":1,"score":0.42340001463890076},{"id":"https://openalex.org/C2987875673","wikidata":"https://www.wikidata.org/wiki/Q187939","display_name":"Manufacturing process","level":2,"score":0.2838999927043915},{"id":"https://openalex.org/C199639397","wikidata":"https://www.wikidata.org/wiki/Q1788588","display_name":"Engineering drawing","level":1,"score":0.27639999985694885},{"id":"https://openalex.org/C175700187","wikidata":"https://www.wikidata.org/wiki/Q187939","display_name":"Manufacturing","level":2,"score":0.2635999917984009},{"id":"https://openalex.org/C18762648","wikidata":"https://www.wikidata.org/wiki/Q42213","display_name":"Work (physics)","level":2,"score":0.26080000400543213},{"id":"https://openalex.org/C90673727","wikidata":"https://www.wikidata.org/wiki/Q901718","display_name":"Product (mathematics)","level":2,"score":0.23729999363422394},{"id":"https://openalex.org/C77595967","wikidata":"https://www.wikidata.org/wiki/Q3151013","display_name":"Forensic engineering","level":1,"score":0.22390000522136688},{"id":"https://openalex.org/C98045186","wikidata":"https://www.wikidata.org/wiki/Q205663","display_name":"Process (computing)","level":2,"score":0.2198999971151352}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1117/12.3102318","doi":"https://doi.org/10.1117/12.3102318","is_oa":false,"landing_page_url":"https://doi.org/10.1117/12.3102318","pdf_url":null,"source":{"id":"https://openalex.org/S4363605714","display_name":"Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VII","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W7162674775","https://openalex.org/W4293469911","https://openalex.org/W3121197710","https://openalex.org/W3113039239","https://openalex.org/W3111141053","https://openalex.org/W6944461571","https://openalex.org/W3042792820","https://openalex.org/W2090799522","https://openalex.org/W7203917347","https://openalex.org/W413215441"],"abstract_inverted_index":{"The":[0,64,167],"Extremely":[1],"Large":[2],"Telescope":[3],"(ELT),":[4],"a":[5,38,50,75,119,170],"40-m":[6],"class":[7],"optical":[8,23,146],"ground-based":[9],"telescope":[10,24],"led":[11],"by":[12,44,81],"the":[13,20,36,48,68,93,96,108,113,123,131,155,196,201],"European":[14],"Southern":[15],"Observatory":[16],"(ESO),":[17],"will":[18,66,105,191,205],"be":[19,67],"world\u2019s":[21],"largest":[22,69,124],"upon":[25],"completion.":[26],"Its":[27],"adaptive":[28],"optics":[29],"system":[30],"relies":[31],"on":[32,107],"two":[33],"key":[34],"mirrors:":[35],"M4,":[37],"2-mm-thick":[39],"deformable":[40],"glass":[41],"sheet":[42],"actuated":[43],"5,000":[45],"actuators,":[46],"and":[47,87,163,179,213],"M5,":[49],"2.2":[51],"\u00d7":[52],"2.7":[53],"m\u00b2":[54],"flat,":[55],"fast":[56],"tip-tilt":[57,70],"mirror":[58,71],"made":[59],"of":[60,112,141],"silicon":[61],"carbide":[62],"(SiC).":[63],"M5":[65,114,198],"ever":[72,128],"built":[73],"for":[74,83,145,195,220],"telescope,":[76],"designed":[77],"to":[78,153],"stabilize":[79],"images":[80],"compensating":[82],"wind,":[84],"atmospheric":[85],"turbulence,":[86],"telescope-induced":[88],"perturbations.":[89],"It":[90],"also":[91],"directs":[92],"beam":[94],"toward":[95],"Nasmyth":[97],"platforms,":[98],"where":[99],"scientific":[100],"instruments":[101],"are":[102],"housed.":[103],"We":[104],"focus":[106],"unique":[109],"manufacturing":[110],"challenges":[111],"blank":[115,199],"mirror.":[116],"Producing":[117],"even":[118],"single":[120],"petal":[121],"required":[122],"raw":[125],"SiC":[126,142,210],"block":[127],"made.":[129],"But":[130],"main":[132],"technical":[133],"difficulty":[134],"was":[135,169],"combining":[136],"chemical":[137],"vapor":[138],"deposition":[139],"(CVD)":[140],"-":[143,148],"essential":[144],"performance":[147],"with":[149],"brazing":[150,215],"technology,":[151],"necessary":[152],"achieve":[154],"mirror\u2019s":[156],"dimensions.":[157],"This":[158],"combination":[159],"demanded":[160],"innovative":[161],"improvements":[162],"rigorous":[164],"qualification":[165],"processes.":[166],"development":[168],"collaborative":[171],"effort":[172],"involving":[173],"ESO,":[174],"Safran":[175],"Reosc,":[176],"Mersen":[177,180],"Gennevilliers,":[178],"Boostec,":[181],"ensuring":[182],"consistent":[183],"polishing":[184],"behavior":[185],"across":[186],"all":[187],"petals.":[188],"Finally,":[189],"we":[190],"discuss":[192],"upcoming":[193],"developments":[194],"second":[197],"mirror,":[200],"spare":[202],"one,":[203],"which":[204],"benefit":[206],"from":[207],"an":[208],"improved":[209],"CVD":[211],"layer":[212],"enhanced":[214],"material,":[216],"both":[217],"specifically":[218],"qualified":[219],"this":[221],"application.":[222]},"counts_by_year":[],"updated_date":"2026-10-28T10:33:24.094632","created_date":"2026-08-22T00:00:00"}