A shekara ta 1611, masanin ilmin taurari na Jamus Kepler ya ɗauki ruwan tabarau guda biyu na lenticular a matsayin maƙasudi da kuma ido, ƙararrawa ta inganta a fili, daga baya mutane sun ɗauki wannan tsarin gani a matsayin na'urar hangen nesa na Kepler.
A shekara ta 1757, Du Grand ta hanyar nazarin gilashin gilashi da ruwa da watsawa, ya kafa tushen ka'idar ruwan tabarau na achromatic, kuma ya yi amfani da kambi da gilashin gilashin kera ruwan tabarau na achromatic. Tun daga wannan lokacin, achromatic Refractor Telescope gaba daya ya maye gurbin dogon jikin na'urar hangen nesa.
A karshen karni na sha tara, tare da kerawa fasahar inganta, yin wani girma caliber na refracting na'ura mai ba da hanya tsakanin hanyoyin sadarwa zai yiwu, sa'an nan akwai wani ƙera manyan diamita Refractor Telescope koli. Daya daga cikin mafi wakilci shi ne Ekes telescope mai diamita 102 cm a 1897 da Rick na'urar hangen nesa mai diamita 91 cm a 1886.
Refracting na'ura mai ba da hanya tsakanin hanyoyin sadarwa yana da abũbuwan amfãni daga cikin mai da hankali tsawon, farantin sikelin ne babba, da bututu lankwasawa ne m, mafi dace da astronomical aikin auna. Amma ko da yaushe yana da saura launi, a lokaci guda zuwa ultraviolet, infrared radiation sha yana da iko sosai. Yayin da babban tsarin zubar da gilashin na gani ke da wahala, ga na'urar hangen nesa ta Yerkes mai karkatar da na'urar hangen nesa da aka gina a 1897, ci gaba ya kai ga ƙarshe, tun cikin shekaru ɗari ba a sami wani na'urar hangen nesa mafi girma ba.
Lokacin aikawa: Afrilu-02-2018