Iindlela ezine zokuBala zokuKhanya kwe-LED
Okokuqala, ukukhanya okukhanyayo
Ukukhanya okukhanyayo kubhekiselele kubungakanani bokukhanya okukhutshwa ngumthombo wokukhanya ngexesha leyunithi, oko kukuthi, inxalenye yamandla akhazimlayo apho amandla akhazimlayo anokubonwa ngeliso lomntu. Ilingana nemveliso yamandla akhazimlayo ebhendi ethile ngexesha leyunithi kunye nokubonakala okuhambelana nelo bhanti. Ekubeni ukubonakala okuzalanayo kobude obuhlukeneyo bokukhanya ngeliso lomntu kwahlukile, ii-fluxes ezikhanyayo azilingani xa amandla emitha yokukhanya ohlukeneyo elingana. Uphawu lokuhamba okukhanyayo ngu Φ, iyunithi yilumens (Lm)
Ngokwe-spectral radiant flux Φ(λ), ifomyula ekhanyayo inokufunyanwa:
Φ=Km■Φ(λ)gV(λ)dλ
Kwifomula, i-V(λ)-i-relative spectral luminous performance; I-Km-ixabiso eliphezulu le-spectral optical performance ye-radiation, kwiiyunithi ze-Lm / W. Ixabiso le-Km linqunywe yiKhomishoni ye-International Metrology kwi-1977 ibe yi-683 Lm / W (λm = 555 nm).
Okwesibini, ukukhanya kokukhanya
Ukukhanya kokukhanya kubhekisa kumandla okukhanya adlula kwindawo yeyunithi ngexesha leyunithi. Amandla alingana ne-frequency, eyi-sum of intensity yabo (okt, integral). Kwakhona kunokuqondwa ukuba ukukhanya okukhanyayo I komthombo wokukhanya kwicala elinikeziweyo ngumthombo wokukhanya. I-quotient ye-luminous flux dΦ egqithiselwa kwi-engile eqinileyo element kweli cala lahlulwe ngesiqalelo se-engile esomeleleyo dΩ
Iyunithi yokukhanya okukhanyayo yi-candela (cd), i-1 cd = 1 Lm / 1 sr. Isimbuku sokukhanya kuwo onke amacala esithubeni kukuhamba okukhanyayo.
Okwesithathu, ukuqaqamba
Kwinkqubo yokuvavanya ukuqaqamba kweetshiphusi ze-LED kunye nokuvavanya ukhuseleko lwemitha yokukhanya ye-LED, iindlela zokucinga zisetyenziswa ngokubanzi, kunye ne-microchip imaging ingasetyenziselwa uvavanyo lwetshiphu. Ukukhanya kukuqaqamba ku-L kwindawo ethile kumphezulu okhupha ukukhanya kumthombo wokukhanya, okuyi-quotient yobukhulu obukhupha ukukhanya kwi-face element dS kwicala elinikiweyo elahlulwe yi-orthographic area ye-face element kwi-face element. inqwelomoya ejonge kwicala elinikiweyo.
Iyunithi yokukhanya yi-candela ngemitha yesikwere (cd/m2). Xa indawo yokukhanya ekhuphayo i-perpendicular ukuya kwicala lokulinganisa, ngoko cos θ = 1.
Okwesine, isikhanyiso
Ukukhanya liqondo apho into ikhanyisa khona, ibonakaliswa ngokokukhanya okuguquguqukayo okufunyenweyo kwiyunithi yendawo nganye. Ukukhanya kunxulumene nendawo yomthombo wokukhanya, indawo ekhanyisiweyo kunye nomthombo wokukhanya esithubeni, kwaye ubungakanani bulingana nokukhanya komthombo wokukhanya kunye ne-engile yesiganeko sokukhanya, kwaye ngokuphambene ngokuhambelana nesikwere umgama ukusuka kumthombo wokukhanya ukuya kumphezulu wento ekhanyisiweyo. Ukukhanya kwe-E kwindawo kumphezulu yi-quotient ye-luminous flux dΦ isiganeko kwiphaneli equka indawo eyahlulwe yindawo yolawulo ye-dS.
Iyunithi lux (LX), 1LX = 1Lm/m2.