Kev siv tshuaj kho lub teeb yog xam nrog cov mis no:
Lub zog ceev x Lub sijhawm = Koob tshuaj
Zoo hmoo, feem ntau cov kev tshawb fawb tsis ntev los no siv cov chav ntsuas txheem los piav qhia lawv cov txheej txheem:
Lub zog ceev hauv mW / cm² (milliwatts ib centimeter squared)
Lub sijhawm hauv s (vijtsam)
Koob tshuaj hauv J/cm² (Joules ib centimeter squared)
Rau kev kho mob lub teeb hauv tsev, yog li ntawd, qhov ceev ntawm lub zog yog qhov tseem ceeb uas koj yuav tsum paub - yog tias koj tsis paub nws, koj yuav tsis paub tias yuav siv koj lub cuab yeej ntev npaum li cas kom ua tiav qee qhov koob tshuaj. Nws tsuas yog qhov ntsuas ntawm qhov muaj zog ntawm lub teeb (lossis muaj pes tsawg photons nyob hauv ib cheeb tsam).
Nrog cov LEDs uas muaj lub kaum sab xis, lub teeb yuav nthuav tawm thaum nws txav mus los, npog thaj chaw dav dua thiab dav dua. Qhov no txhais tau tias lub zog ntawm lub teeb ntawm txhua qhov chaw yuav qaug zog dua thaum qhov deb ntawm qhov chaw nce ntxiv. Qhov sib txawv ntawm lub kaum sab xis ntawm LEDs kuj cuam tshuam rau lub zog ceev. Piv txwv li 3w/10° LED yuav tso tawm lub zog ceev ntawm lub teeb ntau dua li 3w/120° LED, uas yuav tso tawm lub teeb qaug zog dua thaj chaw loj dua.
Cov kev tshawb fawb txog kev kho lub teeb feem ntau siv cov zog ceev ntawm ~ 10mW / cm² txog li qhov siab tshaj plaws ~ 200mW / cm².
Koob tshuaj tsuas yog qhia koj tias lub zog ceev ntawd tau siv ntev npaum li cas. Lub teeb ci ntau dua txhais tau tias yuav tsum siv sijhawm tsawg dua:
5mW/cm² siv rau 200 vib nas this muab 1J/cm².
20mW/cm² siv rau 50 vib nas this muab 1J/cm².
100mW/cm² siv rau 10 vib nas this muab 1J/cm².
Cov chav ntsuas ntawm mW/cm² thiab vib nas this muab cov txiaj ntsig hauv mJ/cm² - tsuas yog muab qhov ntawd los ntawm 0.001 kom tau txais hauv J/cm². Yog li ntawd, cov mis tag nrho, suav nrog cov chav ntsuas tus qauv yog:
Koob Tshuaj = Lub Hwj Chim Ceev x Lub Sijhawm x 0.001