1.Yini ewumngcingo isihlungi sebhendi?

Izihlungizingamadivaysi okukhanya asetshenziselwa ukukhetha ibhendi yemisebe oyifunayo. Izihlungi zebhendi ewumngcingo ziwuhlobo lwesihlungi se-bandpass esivumela ukukhanya kububanzi obuthile be-wavelength ukuthi kudluliselwe ngokugqama okuphezulu, kuyilapho ukukhanya kwamanye ububanzi be-wavelength kuzomuncwa noma kubonakale, ngaleyo ndlela kuzuze umphumela wokuhlunga.

I-passband yezihlungi zebhande elincane lincane kakhulu, ngokuvamile lingaphansi kuka-5% wevelu ye-wavelength emaphakathi, futhi ingasetshenziswa kabanzi emikhakheni eyahlukene, njengesayensi yezinkanyezi, i-biomedicine, ukuqapha imvelo, ukuxhumana, njll.

2.Umsebenzi omncane izihlungi zebhendi

Umsebenzi wesihlungi sebhendi ewumngcingo uwukunikeza ukukhetha kwe-wavelength yesistimu yokubona, ikakhulukazi kulezi zici ezilandelayo:

(1)Ukuhlunga okukhethiwe kokukhanya

Ibhande elincaneizihlungiingahlunga ukukhanya ngokukhetha kububanzi obuthile be-wavelength futhi igcine ukukhanya kububanzi obuthile be-wavelength. Lokhu kubalulekile ezinhlelweni zokusebenza ezidinga ukuhlukanisa phakathi kwemithombo yokukhanya yamaza ahlukene ahlukene noma ezidinga imithombo yokukhanya yobude obuthile bokuhlolwa noma ukubhekwa.

(2)Yehlisa umsindo omncane

Izihlungi zamabhendi amancane zingavimba ukukhanya kububanzi obungadingekile be-wavelength, zinciphise ukukhanya okunhlanhlathayo okuvela emithonjeni yokukhanya noma ukuphazamiseka kokukhanya okungemuva, futhi zithuthukise ukugqama kwesithombe nokucaca.

Ibhande elincane liyahlunga

(3)Ukuhlaziywa kwe-Spectral

Izihlungi ze-narrow band zingasetshenziselwa ukuhlaziya okubonakalayo. Inhlanganisela yezihlungi eziningi zamabhendi amancane ingasetshenziswa ukukhetha ukukhanya kobude obuthile obuthile futhi kwenziwe ukuhlaziya okunembile kwe-spectral.

(4)Ukulawula amandla okukhanya

Izihlungi ze-Narrow band zingasetshenziswa futhi ukulungisa ukukhanya komthombo wokukhanya, ukulawula amandla okukhanya ngokudlulisa ngokukhetha noma ukuvimbela ukukhanya kobude obuthile obuthile.

3.Umgomo wesihlungi sebhande elincane

Ibhande elincaneizihlungisebenzisa ukwenzeka kokuphazamiseka kokukhanya ukuze ukhethe ngokukhethayo noma ubonise ukukhanya ebangeni elithile le-wavelength. Umgomo wayo usekelwe ekuphazamisekeni nasekumunceni kokukhanya.

Ngokulungisa umehluko wesigaba esakhiweni sokunqwabelanisa sezendlalelo zefilimu ezacile, ukukhanya kuphela ebangeni le-wavelength eliqondiwe kudluliselwa ngokukhetha, futhi ukukhanya kwamanye amaza wamaza kuyavinjwa noma kuyaboniswa.

Ngokukhethekile, izihlungi zebhendi emincane zivame ukupakishwa izendlalelo eziningi zamafilimu, futhi inkomba ye-refractive nogqinsi lwesendlalelo ngasinye sefilimu kuthuthukiswa ngokuya ngezidingo zedizayini.

Ngokulawula ukujiya kanye nenkomba ye-refractive phakathi kwezendlalelo zefilimu elincanyana, umehluko wesigaba sokukhanya ungalungiswa ukuze kuzuzwe imiphumela yokuphazamiseka ebangeni elithile le-wavelength.

Uma ukukhanya kwesigameko kudlula kusihlungi sebhendi esincane, ukukhanya okuningi kuzoboniswa noma kudonswe, futhi ukukhanya okukububanzi obuthile kuphela obuzodluliswa. Lokhu kungenxa yokuthi in the mncane ifilimu ungqimba stacking isakhiwoisihlungi, ukukhanya kobude obuthile begagasi kuzoveza umehluko wesigaba, futhi ukwenzeka kokuphazamiseka kuzobangela ukukhanya kobude obuthile bobude ukuthi kuthuthukiswe, kuyilapho ukukhanya kwamanye amaza amaza kuzokwesulwa isigaba futhi kubonakale noma kumunceke.