{"id":7245,"date":"2024-04-12T08:06:02","date_gmt":"2024-04-12T07:06:02","guid":{"rendered":"http:\/\/www.e-rihs.it\/?page_id=7245"},"modified":"2024-04-17T15:57:07","modified_gmt":"2024-04-17T14:57:07","slug":"terahertz-time-domain-imaging-spectrometer-thz-tdi-teraasops-menlo-systems","status":"publish","type":"page","link":"https:\/\/www.e-rihs.it\/en\/terahertz-time-domain-imaging-spectrometer-thz-tdi-teraasops-menlo-systems\/","title":{"rendered":"Terahertz Time-Domain Imaging Spectrometer (THz-TDI): TeraASOPS Menlo Systems"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.7.7″ _module_preset=”default”][et_pb_row column_structure=”2_5,3_5″ _builder_version=”4.7.7″ _module_preset=”default”][et_pb_column type=”2_5″ _builder_version=”4.7.7″ _module_preset=”default”][et_pb_image src=”http:\/\/www.e-rihs.it\/wp-content\/uploads\/2024\/04\/Spettrometro-THz-TD-TeraASOPS.jpg” title_text=”Spettrometro THz-TD TeraASOPS” _builder_version=”4.7.7″ _module_preset=”default”][\/et_pb_image][\/et_pb_column][et_pb_column type=”3_5″ _builder_version=”4.7.7″ _module_preset=”default”][et_pb_text _builder_version=”4.7.7″ _module_preset=”default” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n

LABORATORIO: CNR INO<\/strong><\/p>\n

<\/strong><\/p>\n

NOME STRUMENTO<\/strong><\/p>\n

Spettrometro per Imaging nel Dominio del Tempo alle frequenze dei Terahertz (THz-TDI): TeraASOPS Menlo Systems<\/p>\n

 <\/p>\n

INFORMAZIONI GENERALI<\/strong><\/p>\n

L\u2019imaging spettroscopico nel dominio del tempo alle frequenze dei terahertz (THz-TDI) \u00e8 una tecnica all\u2019avanguardia fra quelle attualmente usate per lo studio dei Beni Culturali e fornisce informazioni sulla stratigrafia e sulla composizione di un campione in modo del tutto non invasivo. La radiazione alle frequenze dei THz \u00e8, infatti, non ionizzante e capace di penetrare, per profondit\u00e0 dell\u2019ordine di qualche millimetro, nella maggior parte dei materiali non metallici e pu\u00f2 essere usata per effettuare misure sia in trasmissione sia in riflessione.<\/p>\n

Le misure THz-TDI in riflessione, effettuate lungo pi\u00f9 linee di misura, consentono di acquisire un cubo di dati da cui, mediante opportune tecniche di elaborazione dati, si ottengono informazioni sulle caratteristiche superficiali e sub-superficiali dell\u2019oggetto in esame lungo ciascuna delle tre sezioni spaziali, ovvero nei piani (x-y), (x-z) e (y-z).<\/p>\n

Le misure THz-TDI in trasmissione consentono sia di generare immagini bi-dimensionali del campione sia di effettuare analisi spettroscopiche finalizzate all\u2019identificazione dei materiali costituenti e possono essere effettuate quando lo spessore e le caratteristiche del campione sono tali da consentire la trasmissione del segnale.<\/p>\n

Alcuni esempi di applicazione sono l\u2019identificazione di ridipinture, ripensamenti e disegni preparatori, lo studio della stratigrafia di manufatti decorati (ceramiche invetriate, malte, lacche, dipinti), l\u2019individuazione di distacchi, fessure e difetti otticamente non visibili, la caratterizzazione di materiali plastici e compositi.<\/p>\n

 <\/p>\n

DETTAGLI TECNICI<\/strong><\/p>\n

Lo spettrometro trasportabile TeraASOPS della Menlo Systems disponibile presso il FIXLAB consente di effettuare misure sia in riflessione che in trasmissione. Tale sistema sfrutta il principio dell\u2019asynchronous optical sampling <\/em>(ASOPS) grazie all\u2019uso di due sorgenti laser ultraveloci a femtosecondi collegati all\u2019antenna trasmittente e a quella ricevente tramite fibre ottiche.<\/p>\n

Il sistema di generazione e acquisizione del segnale THz \u00e8 compatto ed integrato in un\u2019unica unit\u00e0. Ad esso \u00e8 associato un sistema di scansione bidimensionale, la cui massima area di scansione \u00e8 30 x 30 cm2<\/sup>.<\/p>\n

La finestra spettrale nominale del sistema \u00e8 di 4.5 THz e l\u2019intervallo di scansione nel dominio del tempo \u00e8 di 10 ns. Il rapporto fra segnale e rumore \u00e8 > 70 dB (con differenza in frequenza = -10 Hz, sampling rate = 10MHz, gain = 106<\/sup>, larghezza di banda = 1.8 MHz, 1000 medie).<\/p>\n

La risoluzione laterale della misura \u00e8 determinata dalla dimensione dell\u2019impulso THz nel punto di focalizzazione, che \u00e8 di circa 1.5 mm, e dal passo del sistema di scansione, che non pu\u00f2 essere inferiore a 0.1 mm. La risoluzione in profondit\u00e0 dipende dalla larghezza della banda utile del sistema ed \u00e8 uguale a circa 0.5 ps, corrispondenti a 60 \u03bcm (in aria).<\/p>\n

La massima profondit\u00e0 di indagine \u00e8 di 7.5 mm (in aria).<\/p>\n

 <\/p>\n

Referente:<\/p>\n

Valentina Di Sarno valentina.disarno@ino.cnr.it<\/a><\/p>\n

 <\/p>\n

Scarica la scheda completa<\/a><\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

LABORATORIO: CNR INO NOME STRUMENTO Spettrometro per Imaging nel Dominio del Tempo alle frequenze dei Terahertz (THz-TDI): TeraASOPS Menlo Systems […]<\/p>\n","protected":false},"author":17,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"class_list":["post-7245","page","type-page","status-publish","hentry"],"yoast_head":"\nTerahertz Time-Domain Imaging Spectrometer (THz-TDI): TeraASOPS Menlo Systems | E-RIHS.it<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.e-rihs.it\/en\/terahertz-time-domain-imaging-spectrometer-thz-tdi-teraasops-menlo-systems\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Terahertz 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