Indlela yoMlinganiso yokuKhanya kwe-LED
Njengemithombo yokukhanya yendabuko, iiyunithi zokulinganisa ukukhanya kwemithombo yokukhanya ye-LED zifana. Ukuze wenze abafundi baqonde kwaye basebenzise ngokufanelekileyo, ulwazi olufanelekileyo luya kwaziswa ngokufutshane apha ngezantsi:
1. Ukuguquguquka okukhanyayo
Ukukhanya okukhanyayo kubhekisa kumthamo wokukhanya okhutshwa ngumthombo wokukhanya ngexesha leyunithi nganye, oko kukuthi, inxalenye yamandla akhazimlayo apho amandla akhazimlayo anokuviwa ngeliso lomntu. Ilingana nemveliso yamandla akhazimlayo ebhendi ethile ngexesha leyunithi kunye nezinga lokujonga elihambelanayo le bhanti. Kuba amehlo abantu anemilinganiselo eyahlukileyo yokujonga ukukhanya kobude obahlukeneyo, xa amandla okukhanya okukhanya kwamaza ahlukeneyo elingana, ukukhanya okukhanyayo akulingani. Isimboli sokukhanya okukhanyayo ngu-Φ, kwaye iyunithi yilumens (Lm).
Ngokwe-spectral radiant flux Φ (λ), ifomyula ekhanyayo inokufumaneka:
Φ=Km■Φ(λ)gV(λ)dλ
Kwifomula, i-V(λ)-i-relative spectral luminous performance; I-Km-elona xabiso liphezulu le-radiated spectral luminous performance, kwi-Lm/W. Kwi-1977, ixabiso le-Km linqunywe yi-International Committee of Weights and Measures ibe yi-683Lm / W (λm = 555nm).
2. Ubunzulu bokukhanya
Ukukhanya kokukhanya kubhekisa kumandla okukhanya adlula kwindawo yeyunithi ngexesha leyunithi. Amandla alingana nomthamo kwaye sisimbuku sobunzulu bazo (okt okudityanisiweyo). Inokuqondwa kwakhona njengobunzulu obukhanyayo I bomthombo wokukhanya kwicala elinikiweyo ngumthombo wokukhanya I-quotient ye-luminous flux d Φ idluliselwe kwinto yembombo yetyhubhu kwicala elahlulwe ngekona yetyhubhu element d Ω
Iyunithi yokuqina okukhanyayo yicandela (cd), 1cd=1Lm/1sr. Isimbuku sokukhanya kokukhanya kuwo onke amacala esithubeni kukuguquguquka okukhanyayo.
3. Ukuqaqamba
Kwinkqubo yethu yokuvavanya ukuqaqamba kwee-chips ze-LED kunye nokuvavanya ukhuseleko lwemitha yokukhanya kwe-LED, iindlela zokucinga zisetyenziswa ngokubanzi, kunye ne-imaging microscopic ingasetyenziselwa ukulinganisa uvavanyo lwe-chip. Ukukhanya okukhanyayo kukuqaqamba kwe-L yendawo ethile kumphezulu okhupha ukukhanya kumthombo wokukhanya, oko kukuthi i-quotient yobukhulu obukhanyayo be-elementi yobuso d S kwicala elinikiweyo elahlulwe ngengingqi ye-othographic projection ye-face element inqwelomoya ejonge kwicala elinikiweyo
Iyunithi yokukhanya yi-candela ngemitha yesikwere (cd/m2). Xa umphezulu okhupha ukukhanya ujonge kwicala lomlinganiselo, cosθ=1.
4. Ukukhanyisa
Ukukhanya kubhekiselele kwiqondo into ekhanyiswa ngayo, ebonakaliswa yi-flux ekhanyayo efunyenwe kwindawo nganye yeyunithi. Ukukhanya kuhambelana nomthombo wokukhanya okhanyayo, indawo ekhanyisiweyo kunye nendawo yomthombo wokukhanya kwindawo. Ubungakanani bulingana nobunzulu bomthombo wokukhanya kunye ne-engile yesiganeko sokukhanya, kwaye ngokuphambeneyo ngokuhambelana nesikwere somgama ukusuka kumthombo wokukhanya ukuya kumphezulu wento ekhanyisiweyo. Ukukhanya kwe-E yenqaku kumphezulu yi-quotient ye-flux ekhanyayo d Φ isiganeko kwiphaneli equlethe inqaku elahlulwe ngummandla wendawo yolawulo d S.
Iyunithi yi-Lux (LX), 1LX=1Lm/m2.