Aug 24, 2018 Tso lus

Laser Tu Tshuab

Ua kom yooj yim rau nws, nws yog siv cov kev sib raug zoo siab uas tau tsim los ntawm ib lub cev ntim ntawm laser mus ntub cov hlua ntawm qhov khoom ntawm qhov khoom; qhov kub siab tshwm sim tau los ntawm lub laser ua rau cov ntaub ntawv txuas nrog tev tawm ntawm cov nplais ntawm lub substrate, uas ua tiav lub hom phiaj kev tu.

Cov khoom ntim khoom muaj xws li cov khaubncaws sab nraud povtseg, cov txheej pleev xim, cov txheej xeb, thiab cov txheej pov tseg rau ntawm cov khoom siv. Cov ntaub ntawv muaj xws li: tu vaj tu tsev, hlau ntim txheej xim thiab sib tshuav ob sab sib tsoo, oxides, tshem tawm cov roj, tshem tawm thiab kev txuag cov keeb kwm artifacts.

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Laser tu ua tiav qhov kev tshem tawm los ntawm kev kov cov khoom txuas ntawm cov khoom siv rau cov khoom ntub. Lub ntsiab mechanism ntawm kev txiav txim muaj xws li cov nram qab no:

1. Tshem tawm ntawm cov kua txaws (liquid splash): Cov khoom ntawm cov ntaub ntawv txuas nrog tsis ncav cuag cov roj carbonization thiab tsis pom zoo kiag li nyob rau hauv daim ntawv ntawm nyias txheej ntawm cov kua, thaum lub zog quab yuam los ntawm qhov kev nthuav dav ntawm qhov roj thiab cov tshuab cov txheej txheem roj quab yuam lub liquid deposit rau txaws. Ua kom tiav qhov kev tshem tawm;

2, tshem tawm cov kua txaws (liquid excitation): cov khoom siv ntawm cov khoom siv txuas tsis ncav cuag cov pa roj carbon dioxide thiab tsis nyob rau hauv daim ntawv ntawm nyias txheej ntawm cov kua, thaum lub zog quab yuam los ntawm qhov kev nthuav dav ntawm qhov roj thiab cov tshuab cov txheej txheem roj quab yuam lub liquid deposit rau txaws Yuav ua kom tiav cov nyhuv tawm;

3. Tshem tawm ntawm vaporization evaporation: lub zog laser ua rau ua pa los yog evaporation ntawm deposits rau hauv substrate;

4. Tshem tawm cov ntshav: Lub siab kub siab kub los ntawm lub zog siab laser ua rau lub siab kub ntawm qhov tso nyiaj thiab cov ntaub ntawv substrate. Cov roj tseem yuav nqus cov laser zog los tsim lub siab kub ntshav, thiab cov ntshav plhis lub zog thiab ua kom sai li sai tau tsim kev tawg. Kev poob siab nthwv dej generated los ntawm qhov tawg nkag ntawm lub txheej tsev;

5. Tshem tawm cov ntshav: Lub siab kub siab tau los ntawm lub zog siab laser ua rau lub siab kub ntawm qhov tso nyiaj thiab cov ntaub ntawv substrate. Cov roj tseem yuav nqus cov laser zog los tsim lub siab kub ntshav, thiab cov ntshav plhis lub zog thiab ua kom sai li sai tau tsim kev tawg. Kev poob siab nthwv dej generated los ntawm qhov tawg nkag ntawm lub txheej tsev;

6. Tshem tawm ntawm ablation: Laser mos ablation txhais tias yog qhov phenomenon ntawm huab hwm coj migration, yaig los yog poob ntawm cov khoom nto vim muaj ntau yam mechanisms hauv lub irradiation ntawm qis zog ceev laser. Mos ablation feem ntau tshwm sim nyob rau hauv laser tu ntawm cov organic adhesion txheej, thiab nws cov kev txiav txim yog tshuaj lom neeg cov tshuaj tiv thaiv.

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Lub pulsed Nd: YAG laser tu txheej txheem cia siab rau cov yam ntxwv ntawm lub teeb pulses uas ua los ntawm lub laser, raws li cov kev yees duab photophysical tshwm sim los ntawm kev sib cuam tshuam ntawm siab siv kab, luv pulsed lasers, thiab cov kab mob muaj kab mob. Nws cov ntsiab cai ntawm lub cev yeej ua tiav raws li hauv qab no:

1. Kev nqus ntawm lub zog loj tuaj sai sai sai cov plasma (ib co ionized tsis ruaj tsis ua pa roj) uas ua rau muaj kev poob siab nthwv dej;

2. Cov dej hiav txwv ua rau cov kab mob ua kom tawg taus thiab tsis txais;

3, lub teeb nrig ntawm lub teeb yuav tsum tsis tshua txaus kom tsis txhob muaj lub tshav kub ntawm qhov puas ntawm qhov chaw kho mob;

4. Cov kev sim tau pom tias thaum muaj oxide nyob saum npoo ntawm cov hlau, cov ntshav tawm ntawm qhov hlau.

5. Cov kev sim tau pom tias thaum muaj oxide nyob saum npoo ntawm cov hlau, cov ntshav tawm ntawm cov hlau.

Lub plasma yog tsuas yog thaum lub zog ceev tshaj qhov siab tshaj plaws, uas nyob ntawm tus kab mob muaj kab mob los yog oxide raug tshem tawm. Qhov pib ntawm no yog ib qho tseem ceeb rau kev tu tsev thaum ua kom muaj kev ruaj ntseg ntawm cov ntaub ntawv substrate. Kuj tseem muaj qhov thib ob rau kev kuaj ntshav. Yog tias lub zog ntim tshaj qhov chaw no, cov ntaub ntawv substrate yuav raug rhuav tshem. Txhawm rau kom muaj kev tu vaj tse zoo nyob rau hauv qhov tsim nyog ntawm txoj kev ruaj ntseg ntawm cov khoom siv substrate, cov laser kev yuav tsum tau kho raws li qhov teeb meem kom lub zog ntawm lub teeb plawv yog nruj nruj ntawm ob lub thwj.

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