Mita masu auna zare na gani yawanci suna amfani da zare na gani a matsayin mahadar sigina, wanda za a haɗa shi da na'urar auna zare don nazarin zare. Saboda sauƙin amfani da zare na gani, masu amfani za su iya zama masu sassauci sosai don gina tsarin siginar gani.
Amfanin na'urorin auna fiber optic shine tsarin aunawa da sassauci.Na'urar auna zare ta gani (optical fiber spectrometer)daga MUT a Jamus yana da sauri sosai har ana iya amfani da shi don nazarin kan layi. Kuma saboda amfani da na'urorin gano abubuwa masu rahusa na duniya, farashin na'urar aunawa ya ragu, don haka farashin tsarin aunawa gaba ɗaya ya ragu.
Tsarin asali na na'urar auna zafin jiki ta fiber optic ya ƙunshi grating, slit, da na'urar gano abubuwa. Dole ne a ƙayyade sigogin waɗannan abubuwan yayin siyan na'urar auna zafin jiki. Aikin na'urar auna zafin jiki ya dogara ne akan haɗin kai da daidaitawar waɗannan abubuwan, bayan daidaita na'urar auna zafin jiki ta fiber optic, a ƙa'ida, waɗannan kayan haɗin ba za su iya samun wani canji ba.
Gabatarwar aiki
raga
Zaɓin grating ya dogara ne akan kewayon spectral da buƙatun ƙuduri. Ga na'urorin aunawa na fiber optic, kewayon spectral yawanci yana tsakanin 200nm da 2500nm. Saboda buƙatar ƙuduri mai girma, yana da wuya a sami kewayon spectral mai faɗi; A lokaci guda, mafi girman buƙatar ƙuduri, ƙarancin kwararar haske. Don buƙatun ƙarancin ƙuduri da kewayon spectral mai faɗi, layin 300 / mm grating shine zaɓin da aka saba. Idan ana buƙatar ƙuduri mai girma, ana iya cimma shi ta hanyar zaɓar grating mai layuka 3600 / mm, ko zaɓar na'urar ganowa mai ƙarin ƙudurin pixel.
tsagewa
Ramin da ya fi ƙanƙanta zai iya inganta ƙudurin, amma kwararar haske ta fi ƙanƙanta; A gefe guda kuma, rabe-raben da suka fi faɗi na iya ƙara saurin fahimta, amma a sakamakon ƙudurin. A cikin buƙatun aikace-aikace daban-daban, ana zaɓar faɗin rabe-raben da ya dace don inganta sakamakon gwaji gaba ɗaya.
bincike
Na'urar ganowa ta wasu hanyoyi tana tantance ƙuduri da ƙarfin na'urar aunawa ta fiber optic, yankin da ke da ƙarfin haske a kan na'urar ganowa yana da iyaka, an raba shi zuwa ƙananan pixels da yawa don ƙuduri mai girma ko kuma an raba shi zuwa ƙananan pixels amma manyan don babban ƙarfin. Gabaɗaya, ƙarfin na'urar ganowa ta CCD ya fi kyau, don haka za ku iya samun mafi kyawun ƙuduri ba tare da ƙarfin ji ba har zuwa wani mataki. Saboda yawan ƙarfin ji da hayaniyar zafi na na'urar ganowa ta InGaAs a cikin infrared kusa, ana iya inganta rabon sigina zuwa hayaniya na tsarin yadda ya kamata ta hanyar sanyaya.
Matatar gani
Saboda tasirin bambancin matakai da yawa na bakan da kansa, ana iya rage tsangwama na bambancin matakai da yawa ta hanyar amfani da matatar. Ba kamar na'urorin auna sigina na gargajiya ba, ana shafa na'urorin auna sigina na fiber optic a kan na'urar gano sigina, kuma wannan ɓangaren aikin yana buƙatar a sanya shi a wurinsa a masana'anta. A lokaci guda, rufin yana da aikin hana haske kuma yana inganta rabon sigina zuwa hayaniya na tsarin.
Aikin na'urar auna sigina (spectrometer) galibi yana da alaƙa da kewayon sigina (spectral range), ƙudurin gani (optical resolve) da kuma ƙarfin gani (sensitivity). Sauya ɗaya daga cikin waɗannan sigogi yawanci zai shafi aikin sauran sigogi.
Babban ƙalubalen na'urar auna sigina ba shine a ƙara yawan sigogi a lokacin ƙera ta ba, sai dai a sa alamun fasaha na na'urar auna sigina su cika buƙatun aiki don aikace-aikace daban-daban a cikin wannan zaɓin sarari mai girma uku. Wannan dabarar tana ba wa na'urar auna sigina damar gamsar da abokan ciniki don samun riba mafi girma tare da ƙaramin jari. Girman na'urar auna sigina ya dogara ne akan alamun fasaha da na'urar auna sigina ke buƙatar cimmawa, kuma girmansa yana da alaƙa da sarkakiyar na'urar auna sigina da farashin samfurin na'urar auna sigina. Samfuran na'urar auna sigina ya kamata su cika cikakkun sigogin fasaha da abokan ciniki ke buƙata.
Kewayen spectral
Mitoci masu auna siginatare da ƙaramin kewayon spectral yawanci yana ba da cikakkun bayanai game da spectral, yayin da manyan spectral line suna da faffadan kewayon gani. Saboda haka, kewayon spectral na spectrometer yana ɗaya daga cikin mahimman sigogi waɗanda dole ne a ƙayyade su a sarari.
Abubuwan da ke shafar kewayon spectral galibi su ne grating da detector, kuma ana zaɓar grating da detector masu dacewa bisa ga buƙatu daban-daban.
hankali
Da yake magana game da hankali, yana da mahimmanci a bambance tsakanin hankali a cikin photometry (ƙaramin ƙarfin sigina dana'urar auna sigina (spectrometer)zai iya ganowa) da kuma jin daɗin stoichiometry (ƙaramin bambanci a cikin sha wanda spectrometer zai iya aunawa).
a. Ra'ayin Photometric
Ga aikace-aikacen da ke buƙatar na'urorin auna haske mai ƙarfi, kamar hasken rana da Raman, muna ba da shawarar na'urorin auna haske na SEK masu amfani da hasken rana tare da na'urorin gano CCD masu girma biyu masu girman pixel 1024 masu zafi, da kuma ruwan tabarau masu haɗa haske, madubai na zinariya, da kuma ramuka masu faɗi (100μm ko faɗi). Wannan samfurin zai iya amfani da dogon lokacin haɗa haske (daga milise seconds 7 zuwa mintuna 15) don inganta ƙarfin sigina, kuma yana iya rage hayaniya da inganta kewayon motsi.
b. Mayar da hankali kan yanayin motsa jiki
Domin gano ƙima biyu na yawan sha tare da kusancin girma, ba wai kawai ana buƙatar ƙarfin na'urar gano ba, har ma ana buƙatar rabon sigina zuwa ga hayaniya. Na'urar ganowa mai mafi girman rabon sigina zuwa ga hayaniya ita ce na'urar gano CCD mai girman girma biyu mai zafi mai zafi 1024-pixel a cikin na'urar auna sigina ta SEK tare da rabon sigina zuwa ga hayaniya na 1000:1. Matsakaicin hotunan bakan gizo da yawa kuma na iya inganta rabon sigina zuwa ga hayaniya, kuma ƙaruwar matsakaicin lamba zai sa rabon sigina zuwa ga hayaniya ya ƙaru a saurin tushen murabba'i, misali, matsakaicin sau 100 na iya ƙara rabon sigina zuwa ga hayaniya sau 10, yana kaiwa 10,000:1.
ƙuduri
Nunin haske muhimmin ma'auni ne don auna ƙarfin rabuwar haske. Idan kuna buƙatar ƙudurin haske mai girma, muna ba da shawarar ku zaɓi grating mai layuka 1200/mm ko fiye, tare da kunkuntar tsaga da na'urar gano CCD ta pixel 2048 ko 3648.
Lokacin Saƙo: Yuli-27-2023