Chav nyob ntawm Lux metres thiab daim ntawv thov
Ntau tus neeg muas zaub yuav hais tias, 'Kuv xav yuav ib qho menuminance meter,' thiab ib txwm nug seb chav ntsuas yog dab tsi! Tam sim no cia peb qhia luv luv txog qhov chaw. Lub chaw nres tsheb yog ib chav uas qhia txog kev siv lub teeb, thiab nws lub ntsiab ntawm lub cev yog qhov muaj teeb tsa rau ib qho chaw. Illuminance yog ntsuas hauv cov lumens rau ib saug meter (LM), tseem hu ua Lux: 1} lm / m2. Los ntawm kab zauv saum toj saud, nws tuaj yeem pom tau tias Luminous Flux, txhais tau tias yog qhov ntsuas kub ntawm 1/60 square 'square ntawm lub kaum sab xis ntawm 1 kheej kheej.
Cov lus piav qhia txog cov chaw ua haujlwm saum toj no zoo li theoretical thiab feem ntau nyuaj kom nkag siab. Txhawm rau kom muaj kev nkag siab ntau ntxiv ntawm cov kev ua kom pom tseeb, piv txwv li, ib lub teeb lub teeb ci rau lub teeb ci ntsa iab tag nrho ntawm kaum 1200lm. Yog hais tias cov luminous flux yog uniformly faib rau ib nrab kheej kheej ntawm cov kauj ruam ntawm 1m yog 1200lm / 6.28 m {13} lux. Ib yam li ntawd, thaj chaw hemispherical nrog lub vojvoog ntawm 5m yog 2 π {m2, thiab lub teeb pom kev zoo ntawm qhov deb ntawm 5m los ntawm lub hauv paus yog 1200lm / 157 m2=7.64 lux.
Qhov xwm txheej dav dav: kwv yees li 100000 feeb nyob rau lub caij ntuj sov nyob hauv tshav ntuj; Lub teeb sab nraum zoov siv rau hnub huab yog 10000lux; Sab hauv nruab hnub nrig lub teeb taws teeb yog 100lux; Lub teeb pom kev ntawm lub desktop 60cm deb ntawm 60W lub rooj teeb yog 300LUX; Lub teeb pom kev nyob rau hauv cov chaw tshaj tawm hauv TV chaw nres tsheb yog 1000LUX; Thaum tsaus ntuj zuag, chav muaj lub teeb siv hluav taws xob ntawm 10lux; Lub teeb pom kev ntawm hmo ntuj txoj kev yog 0.1lux; Candlelight Lub teeb (nyob deb ntawm 20cm) yog 10-15 lux.
Hais lus ntawm uas txhua tus yuav tsum nkag siab ntxiv txog ntawm chav tsev ntawm menuminance meter. Qhov tseeb, kev ua kom pom qhov tseeb tau siv dav hauv cov tuam tsev, cov tsev kawm ntawv, tsev muag khoom lag luam, chaw muag khoom, chav soj ntsuam, chav soj ntsuam, thiab lwm yam. Cov chaw no tas nrho yuav tsum muaj qhov chaw nres loj me. Nws tuaj yeem ua exaggerated tias txhua qhov chaw muaj lub teeb pom kev, lub teeb taws me me yuav raug siv los ntsuas qhov kev puas tsuaj tam sim no. Tam sim no, cia kuv muab koj cov nqi uas tsim nyog rau qhov tsis zoo rau qhov chaw.
