1. Visual illuminometer: siv tsis yooj yim, tsis raug, tsis tshua siv
2. Photoelectric illuminance meter: feem ntau siv selenium photovoltaic illuminance meter thiab silicon photovoltaic illuminance meter
Kev sib xyaw thiab siv cov kev cai ntawm photocell illuminance meter:
1. Composition: Microammeter, hloov pob qhov rooj, xoom taw tes hloov kho, khi ncej, photocell, V (λ) kho lim, thiab lwm yam.
Feem ntau siv selenium (Se) photocell lossis silicon (Si) photocell illuminometer, tseem hu ua lux meter
2. Yuav tsum tau siv:
Lub illuminometer sojntsuam yog ua los ntawm iav, uas yog ib qho yooj yim kom tawg thiab puas. Nyob rau tib lub sijhawm, cov nyhuv dej tsis zoo yog qhov tsis zoo thaum siv.
① Photocells siv selenium (Se) photocells lossis silicon (Si) photocells nrog zoo linearity; lawv muaj peev xwm tswj tau zoo stability tom qab ua hauj lwm mus sij hawm ntev, thiab muaj siab rhiab heev; Thaum siab E, xaiv lub siab sab hauv photocells, uas tsis tshua muaj rhiab heev thiab zoo linearity, tsis yooj yim puas los ntawm lub teeb pom kev zoo.
② Muaj V (λ) kho lim sab hauv, uas tsim nyog rau lub teeb pom kev sib txawv ntawm cov xim kub kub, thiab qhov yuam kev me me
③ Lub kaum sab xis cosine compensator (opal dawb iav los yog yas dawb) yog ntxiv rau pem hauv ntej ntawm lub photocell vim hais tias thaum lub teeb meem lub kaum sab xis loj, lub photocell deviates los ntawm txoj cai cosine.
④ Lub illuminometer yuav tsum ua haujlwm ntawm chav tsev kub lossis ze rau chav sov (photocell drift hloov nrog kub)
