Light Source vs Illuminant
Lub teeb ci thiab lub teeb pom kev zoo yog cov ntsiab lus tseem ceeb hauv kev ua haujlwm ntawm physics, photography, astronomy thiab ntau lwm yam kev tshawb fawb. Illuminants thiab light sources feem ntau yuam kev rau tib lub tswv yim txawm tias lawv txawv me ntsis ntawm ib leeg. Kev nkag siab zoo hauv cov teeb pom kev zoo thiab cov teeb pom kev zoo yuav tsum tau ua kom ua tau zoo hauv thaj chaw uas vam khom rau cov ntsiab lus no. Nyob rau hauv tsab xov xwm no, peb yuav tham txog dab tsi lub teeb thiab illuminants yog, lawv cov ntsiab lus thiab kev siv, zoo sib xws ntawm lub teeb qhov chaw thiab illuminants, thiab thaum kawg qhov txawv ntawm lub teeb qhov chaw thiab illuminants.
Lub Teeb Teeb
Muaj ntau hom teeb pom kev zoo uas peb ntsib hauv peb lub neej txhua hnub. Hom teeb pom kev zoo tshaj plaws uas peb ntsib yog cov khoom siv hluav taws xob thermal. Ib lub teeb ci thermal tsim lub teeb los ntawm excitation thiab so ntawm electron hauv atoms thiab thermal oscillation ntawm electrons. Txhua yam khoom muaj qhov kub siab tshaj qhov xoom xoom emits electromagnetic tsis. Rau lub cev dub, nws yuav tsum tau muab sau tseg tias cov khoom yuav tawm tag nrho cov electromagnetic spectrum tab sis nrog kev sib txawv ntawm txhua cheeb tsam. Lub wavelength uas ntau tshaj plaws ntawm cov hluav taws xob tawm tuaj yeem suav nrog siv Wien txoj cai hloov chaw. Txoj cai no tuaj yeem txheeb xyuas nrog cov kab zauv hauv qab no. λmT=qhov tsis tu ncua qhov twg λm yog qhov wavelength uas qhov siab tshaj plaws ntawm photons raug tso tawm. Qhov kev siv tas li ntawm no yog Wien qhov tas li thiab qhov ntsuas kub yuav tsum tau siv rau hauv daim ntawv ntawm kelvin. Lub teeb qhov chaw yog ib yam dab tsi tiag tiag tsim teeb. Sib nrug los ntawm cov khoom siv hluav taws xob thermal, LASERs, fluorescent qij, semiconductor diodes kuj tseem siv los ua qhov chaw teeb pom kev zoo. Lub teeb ci yog siv ntau hauv kev yees duab. Hauv kev yees duab, cov teeb pom kev zoo yog lub hnub, teeb nyem, teeb pom kev zoo thiab tsom teeb.
Illuminants
Illuminants yog chav tshwj xeeb ntawm txoj kev teeb pom kev zoo. Muaj ntau ntau hom qauv illuminants. Cov chav kawm-A ntawm cov qauv teeb pom kev zoo yog hais txog cov teeb ci hauv tsev. Chav kawm-B thiab C hais txog qhov chaw nruab hnub nrig. Cov no tau txais los ntawm kev lim A-class illuminants. Chav kawm-D yog hais txog lub ntuj nruab hnub. Cov no tau tsim tom qab chav kawm-B thiab C; yog li ntawd, lawv yog cov raug thiab siab tshaj li cov chav kawm-B thiab chav kawm-C illuminants. Chav kawm-E yog hais txog qhov pom tag nrho cov spectrum emission nrog sib npaug photons nyob rau hauv txhua lub wavelength. Cov chav kawm F illuminants xa mus rau tus qauv fluorescent teeb spectrum. Cov qauv illuminants no tseem ceeb heev hauv cov teb xws li kev yees duab. Cov chav kawm ntawm cov teeb pom kev zoo siv los tsim cov teeb pom kev zoo tuaj yeem cuam tshuam ncaj qha rau daim duab thiab kev ua haujlwm tom qab.
Qhov txawv ntawm Lub Teeb thiab Lub Teeb Pom Kev yog dab tsi?
• Qhov chaw teeb tuaj yeem yog txhua yam uas tsim lub teeb. Cov khoom xws li lub hnub, hnub qub, qhov muag teev lossis lwm yam uas tsim lub teeb yog lub teeb ci.
• Lub teeb pom kev yog ib txwm yog cov khoom siv dag zog lossis cov khoom siv. Feem ntau cov teeb nrog cov ntxaij lim dej thiab cov reflectors yog siv los ua illuminants. Tus qauv illuminants raug cais kom yooj yim ntawm lawv siv hauv kev yees duab.
