Chiyambi cha Mafotokozedwe a Magwiridwe a Ntchito a Sefa - Mutu 1

Mafotokozedwe a magwiridwe antchito a fyuluta ndi mafotokozedwe ofunikira a magwiridwe antchito a fyuluta m'chinenero chomwe chingamveke mosavuta ndi opanga makina, ogwiritsa ntchito, opanga ma fyuluta, ndi zina zotero. Nthawi zina wopanga ma fyuluta amalemba mafotokozedwewo kutengera magwiridwe antchito a fyuluta. Nthawi zina amalembedwa ndi wopanga ma fyuluta kutengera magwiridwe antchito a fyuluta, kaya kwa wogwiritsa ntchito, kapena kabukhu kazinthu wamba komwe sikugwiritsidwa ntchito momveka bwino, komwe komaliza sitikambirana pano. Nthawi zambiri, mafotokozedwe a magwiridwe antchito nthawi zambiri amalembedwa ndi wopanga makina.

Kuti apeze magwiridwe antchito omwe akufunidwa kuchokera ku dongosololi, wopanga amafotokoza magwiridwe antchito ofunikira a fyuluta mu muyeso. Polemba muyeso woterewu, funso loyamba lomwe liyenera kuyankhidwa ndilakuti: Kodi fyuluta imagwiritsidwa ntchito chiyani? Cholinga cha fyuluta chiyenera kufotokozedwa momveka bwino komanso molondola, ndipo ichi chidzakhala maziko a zolemba. Palibe njira yolongosolera tsatanetsatane wa magwiridwe antchito. Nthawi zina magwiridwe antchito a dongosolo lomwe fyuluta imagwiritsidwa ntchito ayenera kukhala pamlingo winawake, apo ayi sipadzakhala cholinga chachikulu mukufotokozera kwina. Zofunikira pa magwiridwe antchito a fyuluta ziyenera kudziwika mosavuta, koma nthawi zambiri si ntchito yophweka. Palibe zofunikira zenizeni pakugwira ntchito; magwiridwe antchito ayenera kukhala okwera kwambiri monga momwe zovuta kapena mtengo wake ungalolere. Pankhaniyi, dongosololi limagwiritsa ntchito zosefera za magwiridwe antchito osiyanasiyana, ndipo magwiridwe antchito ayenera kukhala ofanana ndi mtengo wake, zovuta, komanso kuthekera kopanga zisankho pa zomwe zili zoyenera. Muyeso womaliza udzakhala mgwirizano pakati pa zomwe zikufunika ndi zomwe zingatheke. Izi nthawi zambiri zimafuna kulowetsedwa kwa zambiri za kapangidwe ndi kupanga, komanso kulumikizana kwapafupi pakati pa wogwiritsa ntchito ndi wopanga. Ndikofunikira kukumbukira kuti zofunikira zomwe sizikukwaniritsa ntchito zenizeni ndi zamaphunziro chabe. Mwachitsanzo, tiyeni tiganizire mwachidule vutoli: momwe mungapezere mzere wa spectral mu continuous spectrum. Mwachionekere, fyuluta ya narrowband ikufunika, koma ndi bandwidth yanji ndi mtundu wa fyuluta yomwe ikufunika? Mphamvu ya mzere wa spectral womwe umatumizidwa ndi fyuluta idzadalira makamaka kufalikira kwake kwakukulu (poganiza kuti malo a peak a fyuluta nthawi zonse amatha kusinthidwa ku mzere wa spectral muvuto), pomwe mphamvu ya continuum spectrum idzadalira malo onse omwe ali pansi pa transmittance curve, kuphatikiza dera la wavelength cutoff kutali ndi peak. Passband ikachepa, kusiyana pakati pa harmonic continuum ndi continuous spectrum kumakwera, makamaka pamene passband ikukhala yopapatiza, zomwe nthawi zambiri zimawonjezera cutoff. Komabe, passband ikachepa, zimakhala zodula kwambiri kupanga, popeza kuchepa kwa passband kumawonjezera zovuta zopangira; ndipo kudzapangitsanso kuti chiŵerengero cha focal chikhale chachikulu, chifukwa chimawonjezeranso kukhudzidwa ndi optical noncollimation. Mfundo yomalizayi ikutanthauza kuti pa malo omwewo, bandwidth yocheperako ya fyuluta iyenera kukulitsidwa, kuti chiŵerengero chachikulu cha focal chigwiritsidwe ntchito, koma izi zidzawonjezera zovuta pakupanga ndi zovuta za dongosolo lonse. Njira imodzi yowongolera magwiridwe antchito a fyuluta ndikuwonjezera kutsika kwa m'mphepete mwa passband koma ndikusungabe bandwidth yomweyo. Mawonekedwe a rectangular passband ali ndi kusiyana kwakukulu kuposa fyuluta yosavuta ya Fabry-Perot yokhala ndi theka la m'lifupi lomwelo, ndipo passband ili ndi ubwino wowonjezera kuti cutoff kutali ndi nsonga ya fyuluta imakulanso. Kufotokoza kutsika kwa m'mphepete kumeneku ndi 1/10 bandwidth kapena 1/100 bandwidth kumatha kudziwika. Apanso, m'mphepete mukakhala wokwera kwambiri, zimakhala zovuta komanso zodula kupanga.

– Nkhaniyi yatulutsidwa ndiwopanga makina ophikira vacuumGuangdong Zhenhua