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 kanye 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 emkhathini kanye nesibonisi esikhulu (okufana nalokhu. njenge-guizhou Tianyan 500-metres yokuvula irediyo yesibonakude).
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
