Umthamo wokwelapha okhanyayo ubalwa ngale fomula:
Ukuminyana kwamandla x Isikhathi = Umthamo
Ngenhlanhla, ucwaningo lwakamuva lusebenzisa amayunithi ajwayelekile ukuchaza iphrothokholi yawo:
Ukuminyana kwamandla ku-mW/cm² (ama-milliwatt ngesentimitha isikwele)
Isikhathi ngamasekhondi (amasekhondi)
Umthamo ku-J/cm² (Amajowuli ngesentimitha isikwele)
Ekwelapheni okulula ekhaya, ukuminyana kwamandla ngakho-ke into esemqoka okufanele uyazi - uma ungazi, ngeke ukwazi ukwazi ukuthi ungafaka idivayisi yakho isikhathi esingakanani ukuze uzuze umthamo othile.Kumane kuyisilinganiso sokuthi amandla okukhanya aqine kangakanani (noma mangaki ama-photon endaweni yesikhala).
Ngama-LED aphumayo ane-angled, ukukhanya kusabalele njengoba kuhamba, kuhlanganisa indawo ebanzi futhi ebanzi.Lokhu kusho ukuthi ubukhulu bokukhanya obuhlobene kunoma iyiphi indawo iba buthaka njengoba ibanga ukusuka emthonjeni likhuphuka.Umehluko wama-engeli e-beam kuma-LED nawo uthinta ukuminyana kwamandla.Isibonelo i-LED engu-3w/10° izokhiqiza ukuminyana kwamandla okukhanya ukudlula i-LED engu-3w/120°, ezoveza ukukhanya okubuthakathaka endaweni enkulu.
Izifundo zokwelapha ukukhanya kuvame ukusebenzisa ukuminyana kwamandla okungu-~10mW/cm² kufika ku-max ~200mW/cm².
Idosi ikutshela nje ukuthi ukuminyana kwamandla kwafakwa isikhathi esingakanani.Ukuqina kokukhanya okuphezulu kusho ukuthi kudingeka isikhathi esincane sokufaka isicelo:
5mW/cm² esetshenziswa imizuzwana 200 inikeza 1J/cm².
20mW/cm² esetshenziswa imizuzwana 50 inikeza 1J/cm².
100mW/cm² esetshenziswa imizuzwana 10 inikeza 1J/cm².
Lawa mayunithi we-mW/cm² namasekhondi anikeza umphumela ku-mJ/cm² – vele uphinde lokho ngo-0.001 ukuze ungene ku-J/cm².Ifomula ephelele, kucatshangelwa amayunithi ajwayelekile ithi:
Umthamo = Ukuminyana kwamandla x Isikhathi x 0.001
Isikhathi sokuthumela: Sep-08-2022