Ka hana o ka spectrometer fiber optical

Hoʻohana pinepine nā spectrometers fiber optical i ka fiber optical ma ke ʻano he mea hoʻohui hōʻailona, ​​​​​​ka mea e hoʻopili ʻia me ka photometric i ka spectrometer no ka nānā ʻana i ka spectral. Ma muli o ka maʻalahi o ka fiber optical, hiki i nā mea hoʻohana ke maʻalahi loa e kūkulu i kahi ʻōnaehana loaʻa spectrum.

ʻO ka pōmaikaʻi o nā spectrometers fiber optic ka modularity a me ka maʻalahi o ka ʻōnaehana ana. ʻO ka micromīkini anakahi fiber ʻōpaemai MUT ma Kelemania he wikiwiki loa ia e hiki ai ke hoʻohana ʻia no ka loiloi pūnaewele. A ma muli o ka hoʻohana ʻana i nā mea ʻike honua haʻahaʻa ke kumu kūʻai, ua hoʻemi ʻia ke kumukūʻai o ka spectrometer, a pēlā e hoʻemi ʻia ai ke kumukūʻai o ka ʻōnaehana ana holoʻokoʻa.

ʻO ke ʻano kumu o ka spectrometer fiber optic he grating, kahi slit, a me kahi mea ʻike. Pono e kuhikuhi ʻia nā palena o kēia mau ʻāpana i ke kūʻai ʻana i kahi spectrometer. ʻO ka hana o ka spectrometer e pili ana i ka hui pololei a me ka calibration o kēia mau ʻāpana, ma hope o ka calibration o ka spectrometer fiber optical, ma ke kumumanaʻo, ʻaʻole hiki i kēia mau mea pono ke loaʻa nā loli.

Hoʻolauna hana

wiliwili

ʻO ke koho ʻana o ka grating e pili ana i ka laulā spectral a me nā koi hoʻonā. No nā spectrometers fiber optic, ʻo ka laulā spectral ma waena o 200nm a me 2500nm. Ma muli o ke koi o ka hoʻonā kiʻekiʻe, he paʻakikī ke loaʻa kahi laulā spectral ākea; I ka manawa like, ʻo ke kiʻekiʻe o ke koi hoʻonā, ʻo ka emi ʻana o ka flux luminous. No nā koi o ka hoʻonā haʻahaʻa a me ka laulā spectral ākea, ʻo 300 laina /mm grating ka koho maʻamau. Inā koi ʻia kahi hoʻonā spectral kiʻekiʻe, hiki ke hoʻokō ʻia ma ke koho ʻana i kahi grating me 3600 laina /mm, a i ʻole ke koho ʻana i kahi mea ʻike me ka hoʻonā pixel hou aʻe.

ʻoki

Hiki i ka ʻoki haiki ke hoʻomaikaʻi i ka hoʻonā, akā ʻoi aku ka liʻiliʻi o ke kahe ʻana o ke kukui; Ma ka ʻaoʻao ʻē aʻe, hiki i nā ʻoki ākea ke hoʻonui i ka ʻike, akā ma ke kumukūʻai o ka hoʻonā. I nā koi noi like ʻole, koho ʻia ka laulā ʻoki kūpono e hoʻomaikaʻi i ka hopena hoʻāʻo holoʻokoʻa.

ʻimi

Ma kekahi mau ʻano, hoʻoholo ka mea ʻike i ka hoʻonā a me ka ʻike o ka spectrometer fiber optic, ua kaupalena ʻia ka ʻāpana ʻike mālamalama ma ka mea ʻike, ua māhele ʻia i nā pikela liʻiliʻi he nui no ka hoʻonā kiʻekiʻe a i ʻole ua māhele ʻia i nā pikela liʻiliʻi akā nui no ka ʻike kiʻekiʻe. Ma ke ʻano laulā, ʻoi aku ka maikaʻi o ka ʻike o ka mea ʻike CCD, no laila hiki iā ʻoe ke loaʻa kahi hoʻonā maikaʻi me ka ʻole o ka ʻike i kekahi ʻano. Ma muli o ke ʻano kiʻekiʻe a me ka walaʻau wela o ka mea ʻike InGaAs ma kahi kokoke i ka infrared, hiki ke hoʻomaikaʻi maikaʻi ʻia ka lakio hōʻailona-i-walaʻau o ka ʻōnaehana ma o ke ʻano o ka refrigeration.

Kānana ʻōpae

Ma muli o ka hopena diffraction multistage o ka spectrum ponoʻī, hiki ke hoʻemi ʻia ke komo ʻana o ka diffraction multistage ma ka hoʻohana ʻana i ke kānana. ʻAʻole e like me nā spectrometers maʻamau, ua uhi ʻia nā spectrometers fiber optic ma luna o ka mea ʻike, a pono e hoʻokomo ʻia kēia ʻāpana o ka hana ma kahi o ka hale hana. I ka manawa like, loaʻa i ka uhi ka hana o ka anti-reflection a hoʻomaikaʻi i ka ratio signal-to-noise o ka ʻōnaehana.

Hoʻoholo nui ʻia ka hana o ka spectrometer e ka laulā spectral, ka hoʻonā optical a me ka ʻike. ʻO ka hoʻololi ʻana i kekahi o kēia mau palena e hoʻopilikia pinepine i ka hana o nā palena ʻē aʻe.

ʻO ka pilikia nui o ka spectrometer ʻaʻole ia e hoʻonui i nā palena āpau i ka manawa o ka hana ʻana, akā, e hoʻokō i nā ʻōkuhi loea o ka spectrometer i nā koi hana no nā noi like ʻole ma kēia koho ākea ʻekolu-dimensional. Hiki i kēia hoʻolālā i ka spectrometer ke hoʻomāʻona i nā mea kūʻai aku no ka hoʻihoʻi nui loa me ka hoʻopukapuka liʻiliʻi. Aia ka nui o ka cube i nā ʻōkuhi loea e pono ai ka spectrometer e hoʻokō, a pili kona nui i ka paʻakikī o ka spectrometer a me ke kumukūʻai o ka huahana spectrometer. Pono nā huahana Spectrometer e hoʻokō piha i nā palena loea e pono ai nā mea kūʻai aku.

Ka laulā spectral

Nā mīkini ʻike makame kahi laulā spectral liʻiliʻi e hāʻawi pinepine i ka ʻike spectral kikoʻī, ʻoiai ʻo nā laulā spectral nui he laulā ʻike ākea. No laila, ʻo ka laulā spectral o ka spectrometer kekahi o nā palena koʻikoʻi e pono e wehewehe pono ʻia.

ʻO nā mea e hoʻopilikia ai i ka laulā spectral, ʻo ia ka grating a me ka detector, a ua koho ʻia ka grating a me ka detector e like me nā koi like ʻole.

ʻike koʻikoʻi

Ma ke kamaʻilio ʻana no ka ʻike, he mea nui e hoʻokaʻawale ma waena o ka ʻike ma ka photometry (ka ikaika hōʻailona liʻiliʻi loa amīkini ʻākeahiki ke ʻike) a me ka ʻike i ka stoichiometry (ka ʻokoʻa liʻiliʻi loa i ka absorption e hiki ai i kahi spectrometer ke ana).

a. ʻIkepili photometric

No nā noi e pono ai nā spectrometers kiʻekiʻe, e like me ka fluorescence a me Raman, ke paipai nei mākou i nā spectrometers fiber optical SEK thermo-cooled me nā mea ʻike CCD ʻelua-dimensional 1024 pixel thermo-cooled, a me nā aniani condensing detector, nā aniani gula, a me nā ʻoki ākea (100μm a ʻoi aku paha). Hiki i kēia kumu hoʻohālike ke hoʻohana i nā manawa hoʻohui lōʻihi (mai 7 milliseconds a i 15 mau minuke) e hoʻomaikaʻi i ka ikaika hōʻailona, ​​​​a hiki ke hōʻemi i ka walaʻau a hoʻomaikaʻi i ka laulā dynamic.

b. ʻIke Stoichiometric

I mea e ʻike ai i ʻelua mau waiwai o ka helu omo me ka amplitude kokoke loa, ʻaʻole wale ka ʻike o ka mea ʻike e pono ai, akā pono pū kekahi ka lakio signal-to-noise. ʻO ka mea ʻike me ka lakio signal-to-noise kiʻekiʻe loa ʻo ia ka thermoelectric refrigerated 1024-pixel two-dimensional array CCD detector i loko o ka SEK spectrometer me ka lakio signal-to-noise o 1000:1. Hiki i ka awelika o nā kiʻi spectral he nui ke hoʻomaikaʻi i ka lakio signal-to-noise, a ʻo ka hoʻonui ʻana o ka helu awelika e hoʻonui ai i ka lakio signal-to-noise ma ka wikiwiki o ke kumu square, no ka laʻana, hiki i ka awelika o 100 mau manawa ke hoʻonui i ka lakio signal-to-noise i 10 mau manawa, e hiki ana i ka 10,000:1.

Hoʻoholo

He mea nui ka hoʻonā ʻike maka no ke ana ʻana i ka hiki ke māhele ʻike maka. Inā makemake ʻoe i ka hoʻonā ʻike maka kiʻekiʻe loa, paipai mākou e koho ʻoe i kahi grating me 1200 laina/mm a ʻoi aku paha, me kahi ʻāpana haiki a me kahi mea ʻike CCD 2048 a i ʻole 3648 pixel.