Amalensi okubona aminyene futhi mancane; Amalensi eFresnel mancane futhi makhulu ngosayizi.
Umgomo we-Fresnel lens yisazi sefiziksi saseFrance u-Augustine. Yasungulwa ngu-AugustinFresnel, owashintsha amalensi ayindilinga nayi-aspherical aba amalensi omumo we-planar alula nancane ukuze azuze umphumela ofanayo wokubonwa. Bese, inombolo enkulu yamabhendi optical acutshungulwa endaweni epulaniwe ngokucubungula okunembe kakhulu, futhi ibhendi ngayinye yadlala indima yelensi ezimele. I-Fresnel lens iyindlela engcono kakhulu yokubona ilensi enkulu, eyisicaba kanye nencane.
Ukwenziwa kwamalensi e-Feist Fresnel, ikakhulukazi amalensi osayizi abakhulu, kuhlanganisa ukulingiswa kwedizayini yokubona, ubuchwepheshe bokukhiqiza obunembe kakhulu, izinto ze-polymer kanye nenqubo yokubumba enembile. I-Fresnel lens ingasetshenziswa kabanzi ekukhanyiseni, ekuzulazuleni, ocwaningweni lwesayensi nokunye.
I-Fresnel lens iwumumo wepuleti eliyisicaba elibonisa futhi ligxilise imisebe. Sisebenzisa lesi simiso nobuchwepheshe bokuhlanganisa, singakwazi ukuguqula i-paraboloid, i-ellipsoid kanye nelensi ebonakalayo engaphezulu kwanoma iyiphi indawo yokuvula ibe yisimo sendiza, ukuze sibone ukuhlanganisa ilensi yeFresnel yanoma imuphi usayizi, futhi sihlole ukusetshenziswa kwamandla elanga esikhaleni nesibonisi esikhulu (njenge-guizhou Tianyan 500-metres aperture radio telescope).
Ubuchwepheshe be-Mosaic obungapheli be-Fresnel lens bungasetshenziswa kusuka kumamitha ambalwa, kuya kumakhulu amamitha, kuya kunoma yimuphi usayizi omkhulu. Indawo ekhanyayo ye-Guizhou Tianjia enobubanzi obungamamitha angu-500 ingasebenzisa lobu buchwepheshe be-Mosaic ukuze ilingise i-parabolic surface nge-flat Fresnel lens, enciphisa ubunzima bokucubungula futhi kulula ukuyifaka nokulungisa.
Isikhathi sokuthumela: Dec-24-2021
