Kauj Ruam 5: Cia Lub Teeb Los Ntawm: Yuav Ua Li Cas Short Pass Lim Ua Haujlwm

Cov ntxaij lim dej kho qhov muag zoo li bouncers rau lub teeb, tswj cov wavelengths tau dhau los thiab qhov twg tau thaiv. Cov ntxaij lim dej luv luv yog cov ntxaij lim dej pom uas tso cai rau luv wavelengths ntawm lub teeb kom dhau mus thaum thaiv qhov ntev wavelengths. Lawv yog qhov tseem ceeb hauv ntau lub tshuab kho qhov muag thiab cov cuab yeej siv, ua kom cov ntawv thov los ntawm digital photography mus rau laser technology.

Cov ntxaij lim dej luv luv siv cov teebmeem cuam tshuam los thaiv qhov ntev wavelengths nyob rau hauv infrared (IR) ntau yam thaum kis luv luv pom wavelengths. Lawv muaj ntau txheej ntawm cov khoom pob tshab, feem ntau iav los yog yas, nrog rau qhov sib txawv refractive indices. Cov kev sib tshuam ntawm cov khaubncaws sab nraud povtseg no qhia txog qee lub teeb. Lub thicknesses ntawm cov khaubncaws sab nraud povtseg yog ua tib zoo tswj kom lub luv luv pom wavelengths yuav dhau los ntawm constructively thaum lub sij hawm ntev IR wavelengths yog reflected thiab tshem tawm.

Qee cov ntxaij lim dej luv luv siv cov khoom siv absorbent uas nqus IR wavelengths ntev dua. Tab sis cuam tshuam luv dhau cov ntxaij lim dej, uas tso siab rau cov khoom muaj peev xwm, zoo li muab lub ntsiab lus txiav tawm ntawm qhov sib kis thiab thaiv cov wavelengths. Lawv kuj tuaj yeem xa cov teeb pom kev dav dav. Kev cuam tshuam luv luv-pass lim yuav muaj txog li 50 dielectric txheej los muab kev tiv thaiv zoo tshaj IR ntau.

Short-pass filters muaj ntau daim ntawv thov tseem ceeb. Lawv feem ntau siv hauv kev yees duab thiab cov duab digital los thaiv IR lub teeb, uas tuaj yeem cuam tshuam cov duab xim. Ntau lub koob yees duab siv tshwj xeeb IR-blocking luv pass lim. Cov looj tsom iav zoo li looj tsom iav dub lossis 3D tsom iav kuj tseem siv cov ntxaij lim dej nrawm los thaiv IR wavelengths thaum tso cai rau pom lub teeb hla.

Hauv spectroscopy, cov ntxaij lim dej luv luv thaiv qhov ntev wavelengths, yog li tsuas yog xaiv qhov luv luv yuav tsum tau ntsuas. Lawv kuj tseem ceeb hauv cov cuab yeej kho qhov muag xws li spectrophotometers, interferometers, thiab fluorimeters. Laser thev naus laus zis kuj tseem siv cov ntxaij lim dej luv luv los tsim lub teeb ntawm cov wavelengths tshwj xeeb. Microscopy siv cov ntxaij lim dej tshwj xeeb luv luv rau fluorescence imaging thiab IR imaging.

Qee qhov kev tsim kho tshiab tau txhim kho qhov kev ua haujlwm luv luv thiab cov ntawv thov. Nanoparticle doping muab cov ntxaij lim dej luv luv nrog cov kab txiav tawm qhov siab, thaiv IR wavelengths ntau dua. Nyias-zaj duab xis ntau txheej txheej tuaj yeem kho tau los muab kev lim dej luv luv ntawm cov ntsiab lus raug txiav rau kev siv tshwj xeeb xws li nanomaterials. Cov ntxaij lim dej luv luv ua rau cov tshuab kho qhov muag tsis yooj yim thiab cov kev siv hauv kev siv tshuab biotechnology, kev sib txuas lus, thiab lwm yam kev lag luam siab thaum thev naus laus zis.

Hauv cov ntsiab lus, luv-pass optical lim yog qhov tseem ceeb hauv kev tswj thiab tswj lub teeb rau ntau yam kev siv. Lawv yog qhov tseem ceeb hauv ntau cov cuab yeej kho qhov muag thiab thev naus laus zis uas ua kom peb nkag siab thiab cuam tshuam nrog lub ntiaj teb nyob ib puag ncig peb. Kev nce qib ntxiv hauv cov ntaub ntawv thiab kev tsim khoom yuav ua rau muaj kev siv ntau dua ntawm cov ntxaij lim dej luv luv.