Lub hauv paus ntsiab lus ntsuas ntawm lux meter yog dab tsi?
Lub illuminance meter (los yog lux meter) yog ib qho cuab yeej tsim los ntsuas qhov illuminance.
Nws yog ntsuas qhov degree ntawm illumination ntawm cov khoom, uas yog, qhov piv ntawm cov luminous flux tau nyob rau saum npoo ntawm cov khoom mus rau qhov chaw illuminated.
Lub ntsuas hluav taws xob feem ntau yog tsim los ntawm selenium photocell lossis silicon photocell nrog lub lim thiab microammeter.
Photovoltaic cells yog cov khoom siv hluav taws xob uas ncaj qha hloov lub teeb lub zog rau hauv hluav taws xob hluav taws xob.
Thaum lub teeb cuam tshuam rau saum npoo ntawm selenium photovoltaic cell, qhov teeb meem teeb dhau los ntawm cov hlau nyias zaj duab xis 4 thiab mus txog qhov sib cuam tshuam ntawm semiconductor selenium txheej 2 thiab cov hlau nyias zaj duab xis 4, tsim cov nyhuv photoelectric ntawm lub interface.
Qhov loj ntawm lub generated photocurrent muaj ib tug proportional kev sib raug zoo nrog lub illuminance ntawm lub teeb-tau txais nto ntawm lub photocell.
6 Lub sijhawm no, yog tias muaj kev sib txuas sab nraud, ib qho tam sim no yuav ntws, thiab tus nqi tam sim no yuav qhia rau ntawm microampere meter nrog lux (Lx) raws li qhov ntsuas.
Qhov loj ntawm photocurrent nyob ntawm qhov siv ntawm qhov teeb meem teeb. Lub illuminance meter muaj ib qho kev hloov khoom siv, yog li nws tuaj yeem ntsuas qhov siab illuminance thiab qis illuminance.
Hom illuminance meters:
1. Visual illuminance meter: siv tsis yooj yim, tsis tshua muaj siab, tsis tshua siv
2. Photoelectric illuminance meter: feem ntau siv selenium photocell illuminance meter thiab silicon photocell illuminance meter
