Kev siv cov phiaj xwm tsis tu ncua hauv astronomical thiab lwm yam kev tshawb fawb tau pib poob qis hauv thaum ntxov 1980s vim tias lawv tau maj mam hloov los ntawm cov khoom siv sib txuas (CCDs), uas kuj muab zoo kawg nkaus dimension stability.
Vim li cas CCDs nyiam tshaj daim phiaj duab?
CCD siv piv rau Plate siv:
Qhov rhiab thiab kev daws teeb meem muaj peev xwm ntawm CCD sensor yog ntau dua li cov phaj. … Tsis tas li ntawd xwb, peb muaj cov chaw soj ntsuam zoo li Hubble Space Telescope uas siv CCD tag nrho. Daim phiaj duab siv hauv lub voj voog yuav ua tsis tau.
Thaum twg kev yees duab siv thawj zaug rau hnub qub?
Thawj daim duab ntawm ib qho khoom siv hnub qub (Lub hli) tau muab coj los rau hauv 1840, tab sis nws tsis yog txog rau thaum xyoo pua 19th uas tau nce qib hauv thev naus laus zis tso cai rau kev yees duab stellar kom ntxaws.
Thaum twg iav phaj thaij duab tsim tau?
Invented los ntawm Dr. Richard L. Maddox thiab thawj zaug muaj nyob rau hauv 1873, cov phaj qhuav tsis zoo yog thawj qhov kev lag luam muaj kev vam meej hauv cov duab nruab nrab.
Lawv pom dab tsi thaum daim duab thaij duab tsim tawm?
Thaum cov ntsev tau muab tso ze rau ntawm daim duab thaij duab npog nrog daim ntawv opaque, lub phaj tau pom tias muaj pos huab. Qhov tshwm sim tau pom tias muaj ntau rau txhua qhov uranium ntsev tau kawm thiab yogxaus tias yog ib qho cuab yeej ntawm uranium atom.
