Kev piav qhia ntawm cov lus siv rau lub teeb ntsuas
Txhais ntawm mcd, lumen pobzeb, illumination
"Lumen pobzeb": Lub zog tawm los ntawm lub teeb ci mus rau hauv qhov chaw ib lub sijhawm ua rau tib neeg xav tias lub teeb yog hu ua "luminous flux", thiab nws chav tsev yog "lumen". "Lumen watt" yog lub suab ntawm "lumen / watt", uas yog hais txog qhov sib piv ntawm cov luminous flux tawm los ntawm lub teeb ci thiab hluav taws xob hluav taws xob uas nws siv, uas yog, qhov ua tau zoo ntawm lub teeb ci.
"MCD": Qhov sib txawv ntawm cov nyom flux, uas yog, cov nyom luminous ua rau ib chav ua haujlwm ruaj khov, yog hu ua luminous siv. Nws yog ib qho kev ntsuas ntawm qhov siv ntawm lub teeb ci. Nws lub npe Suav yog "candela" thiab nws lub cim yog "cd". Lub "m" nyob rau hauv pem hauv ntej yog prefix, uas txhais tau tias ib txhiab (ib yam li chav tsev ntawm qhov ntev, Suav lub npe yog "meter", nws lub cim yog "m", ntxiv lwm "m" nyob rau hauv pem hauv ntej los ua "mm", Nws dhau los ua Ib txhiab ntawm ib lub 'meter', uas yog ib millimeter), yog li Suav cov lus ntawm "mcd" yog "millicandela".
"Illuminance: yog hais txog lub luminous flux dhau los ntawm ib yam khoom illuminated los ntawm ib lub teeb qhov chaw nyob rau hauv ib chav tsev, nyob rau hauv layman lub ntsiab lus, nws yog lub degree ntawm cov khoom yog illuminated. Chav tsev yog "lux" thiab nws cov cim yog "Lx.
Ntev-yoj ultraviolet (UVA): wavelength 400 ~ 320nm, nws cov nyhuv lom neeg tsis muaj zog, nws muaj cov nyhuv pigmentation pom tseeb, thiab nws cov nyhuv ua rau cov tshuaj tiv thaiv erythema tsis muaj zog heev. Nws tuaj yeem ua rau qee yam tshuaj (fluorescein sodium, tetracycline, quinine sulfate, hematoporphyrin, pyocyanin los ntawm Pseudomonas aeruginosa thiab cov khoom tsim los ntawm qee cov pwm, thiab lwm yam) tsim cov tshuaj fluorescent. Nws kuj tuaj yeem ua rau cov tshuaj tiv thaiv phototoxic thiab cov tshuaj tiv thaiv photoallergic. Mid-wave ultraviolet (UVB): wavelength 320 ~ 275nm, uas yog ib feem ntawm ultraviolet lom cov teebmeem. Cov tshuaj tiv thaiv erythema muaj zog heev, hloov provitamin D rau hauv vitamin D, txhawb kev loj hlob ntawm cov cell epithelial thiab melanin ntau lawm, thiab inhibiting kev tsis haum tshuaj. Lub teeb luv luv ultraviolet (UVC): wavelength 275 ~ 180nm, muaj qhov pom tseeb erythema cov tshuaj tiv thaiv, thiab muaj qhov pom tseeb tua thiab cuam tshuam cov kab mob thiab kab mob.
