1.Kuyini okunciphile isihlungi sebhendi?

Izihlungiyizinto ezibonakalayo ezisetshenziswa ukukhetha ibhendi yemisebe efiselekayo. Izihlungi zebhendi ezincanyana luhlobo lwesihlungi sebhendi esivumela ukukhanya okusebangeni elithile lamaza ukuthi kudluliselwe ngokukhanya okuphezulu, kuyilapho ukukhanya kwamanye amaza okukhanya kuzomuncwa noma kuboniswe, ngaleyo ndlela kufezwe umphumela wokuhlunga.

I-passband yezihlungi ze-band encane incane kakhulu, ngokuvamile ingaphansi kuka-5% wenani eliphakathi le-wavelength, futhi ingasetshenziswa kabanzi emikhakheni eyahlukahlukene, njenge-astronomy, i-biomedicine, ukuqapha imvelo, ukuxhumana, njll.

2.Umsebenzi we-mncane izihlungi zebhendi

Umsebenzi wesihlungi sebhendi encane ukunikeza ukukhetha kwe-wavelength yesistimu yokukhanya, ikakhulukazi kulezi zici ezilandelayo:

(1)Ukuhlunga okukhethiwe kokukhanya

Ibhendi encaneizihlungiingahlunga ngokukhetha ukukhanya kumabanga athile obude be-wavelength futhi igcine ukukhanya kumabanga athile obude be-wavelength. Lokhu kubalulekile ezinhlelweni zokusebenza ezidinga ukuhlukanisa phakathi kwemithombo yokukhanya yama-wavelength ahlukene noma ezidinga imithombo yokukhanya yama-wavelength athile ukuze kwenziwe izivivinyo noma ukubonwa.

(2)Yehlisa umsindo wokukhanya

Izihlungi zebhendi encane zingavimba ukukhanya ezindaweni ezingadingekile zobude be-wavelength, zinciphise ukukhanya okulahlekile okuvela emithonjeni yokukhanya noma ukuphazamiseka kokukhanya kwangemuva, futhi zithuthukise ukungafani nokucaca kwesithombe.

Izihlungi zebhendi encane

(3)Ukuhlaziywa kwe-Spectral

Izihlungi zebhendi encane zingasetshenziswa ekuhlaziyweni kwe-spectral. Ukuhlanganiswa kwezihlungi zebhendi encane eziningi kungasetshenziswa ukukhetha ukukhanya kwamaza athile futhi kwenziwe ukuhlaziywa kwe-spectral okunembile.

(4)Ukulawula ukuqina kokukhanya

Izihlungi ze-Narrow band zingasetshenziswa futhi ukulungisa amandla okukhanya komthombo wokukhanya, ukulawula amandla okukhanya ngokudlulisa noma ukuvimba ukukhanya kwamaza athile ngokukhetha.

3.Isimiso sesihlungi sebhendi encane

Ibhendi encaneizihlungisebenzisa isenzakalo sokuphazamiseka kokukhanya ukuze udlulise noma ubonise ukukhanya ngokukhetha ebangeni elithile lamaza. Isimiso saso sisekelwe ezicini zokuphazamiseka nokumuncwa kokukhanya.

Ngokulungisa umehluko wesigaba esakhiweni sokunqwabelana kwezingqimba zefilimu ezincane, ukukhanya kuphela okusebangeni lamaza okukhanya okuqondiwe kudluliselwa ngokukhetha, bese ukukhanya kwamanye amaza okukhanya kuvinjiwe noma kuboniswe.

Ngokukhethekile, izihlungi zebhendi encane zivame ukufakwa ngezingqimba eziningi zamafilimu, futhi inkomba yokukhanya kanye nobukhulu bengqimba ngayinye yefilimu kulungiswa ngokuya ngezimfuneko zomklamo.

Ngokulawula ukujiya kanye nenkomba yokukhanya phakathi kwezingqimba zefilimu encane, umehluko wesigaba sokukhanya ungalungiswa ukuze kufezwe imiphumela yokuphazamiseka ebangeni elithile le-wavelength.

Uma ukukhanya kwesigameko kudlula esihlungini esincane sebhendi, iningi lokukhanya lizoboniswa noma limuncwe, futhi ukukhanya kuphela okusebangeni elithile lamaza kuzodluliselwa. Lokhu kungenxa yokuthi ekwakhiweni kwesakhiwo se-stacking sesendlalelo sefilimu encaneisihlungi, ukukhanya kobude besikhathi obuthile kuzokhiqiza umehluko wesigaba, futhi isenzakalo sokuphazamiseka sizobangela ukuba ukukhanya kobude besikhathi obuthile kukhuliswe, kuyilapho ukukhanya kwamanye ama-wavelength kuzokhanselwa isigaba futhi kuboniswe noma kufakwe.