Hom thiab siv txoj kev ntawm illuminometers
1. Visual illuminometer: siv tsis yooj yim, tsis muaj tseeb, thiab tsis tshua siv.
2. Photoelectric illuminometer: feem ntau siv selenium photocell illuminometer thiab silicon photocell illuminometer.
Muaj pes tsawg leeg thiab kev siv yuav tsum tau ntawm photocell illuminometer:
1. Kev sib xyaw: microampere meter, hloov pob qhov rooj, xoom hloov kho, xaim xaim, photocell, V ( λ) Kho qhov sib xyaw ntawm cov lim dej thiab lwm yam khoom siv.
Feem ntau siv selenium (Se) photocells lossis silicon (Si) photocells, tseem hu ua lux meters.
2. Cov kev cai siv:
① Photocells yuav tsum siv selenium (Se) photocells lossis silicon (Si) photocells nrog zoo linearity; Ua kom muaj kev ruaj ntseg zoo thiab muaj kev nkag siab zoo txawm tias tom qab ua haujlwm ntev; Thaum siv high E, xaiv lub photocell nrog siab sab hauv tsis kam, uas tsis tshua muaj rhiab heev thiab zoo linearity, thiab tsis yooj yim puas los ntawm lub teeb muaj zog irradiation.
② Kev them nyiaj sab hauv nrog V (λ) Kho lub lim, haum rau kev siv lub teeb pom kev ntawm lub teeb pom kev zoo heterochromatic, nrog qhov yuam kev me me.
③ Yog vim li cas ntxiv ib cosine lub kaum sab xis compensator (milky dawb iav los yog dawb yas) nyob rau hauv pem hauv ntej ntawm lub photocell yog hais tias thaum qhov teeb meem lub kaum sab xis loj, lub photocell deviates los ntawm txoj cai cosine.
④ Lub illuminometer yuav tsum ua haujlwm ntawm lossis ze ntawm chav tsev kub (qhov drift ntawm photocell hloov nrog kub).
Kev siv illuminometer
① Qhib lub hwj chim.
② Qhib lub hau ntawm lub photodetector thiab tso nws kab rov tav nyob rau hauv txoj hauj lwm ntsuas.
③ Xaiv lub iav uas haum rau kev ntsuas.
Yog tias tsuas yog "1" tshwm sim nyob rau sab laug kawg ntawm lub vijtsam zaub, nws qhia tias muaj teeb meem ntau dhau. Nws yog ib qho tsim nyog yuav tsum nias qhov yuam sij ntau yam (⑧ tus yuam sij) los kho qhov ntsuas ntau yam.
④ Lub illuminometer pib ua haujlwm thiab qhia txog tus nqi illuminance ntawm qhov screen.
⑤ Cov ntaub ntawv tso tawm ntawm lub vijtsam zaub hloov tas li. Thaum cov ntaub ntawv tso tawm yog qhov ruaj khov, nias lub khawm HOLD (⑧ tus yuam sij) txhawm rau xauv cov ntaub ntawv.
⑥ Nyeem thiab sau cov txiaj ntsig pom nyob hauv tus nyeem ntawv. Tus nqi pom zoo yog sib npaug rau cov khoom ntawm tus lej tso tawm hauv tus nyeem ntawv thiab tus nqi ntau.
Piv txwv li, 500 yog tso tawm rau ntawm qhov screen, thiab cov xwm txheej yog tshwm nyob rau hauv qab txoj cai ces kaum "× 2000", nrog ib tug illuminance ntsuas tus nqi ntawm 1000000lx, piv txwv li (500 × 2000).
⑦ Nias lub ntsuas phoo dua kom thim qhov kev nyeem tus nqi ntsuas phoo.
⑧ Thaum txhua qhov kev soj ntsuam, nyeem peb daim ntawv nyeem sib law liag thiab sau lawv.
⑨ Tom qab txhua qhov kev ntsuas ua tiav, nias lub hwj huam hloov khawm kom txiav tawm lub hwj huam mov.
⑩ Npog lub photodetector thiab hloov nws rau hauv lub thawv.
