Thaum koj pom "6500K" teev nyob rau ntawm lub teeb, nws yooj yim xav tias nws txhais tau tias "D65." Tom qab tag nrho, ob tus lej xa mus rau nruab hnub - txoj cai? Tsis raws nraim. Thaum 6500K thiab D65 muaj feem xyuam, lawv yog tsis tib yam, thiab nkag siab qhov sib txawv yog qhov tseem ceeb yog tias koj lub hom phiaj yog xim raug.

Tej zaum koj yuav xav tias cov xim ntawm lub teeb hauv koj chav tsis cuam tshuam dab tsi ntawm koj cov zaub - tom qab tag nrho, ib qho screen emits lub teeb es tsis xav txog nws.

Tab sis qhov ntawd tsuas yog ib nrab qhov tseeb. Lub teeb ambient nyob ib ncig ntawm koj lub vijtsam muaj ib qho cuam ​​tshuam ntawm qhov koj pom ntawm qhov screen. Piv txwv li, yog tias koj chav teeb pom kev zoo muaj xim ntsuab, koj ob lub qhov muag yuav txhais lub vijtsam li me ntsis magenta; Yog hais tias chav tsev teeb yog magenta, koj cov zaub yuav tshwm ntsuab. Qhov no yog vim li cas koj thiaj li ntsia ntawm koj lub MacBook thiab xav paub yog vim li cas nws dheev zoo li "liab liab" - lossis yog vim li cas koj lub TV duab zoo li oddly txias lossis sov - thaum qhov tseeb, nws yog chav teeb pom kev hloov koj lub hauv paus pom.

Dab tsi yog D65 Tiag tiag
"D65" yog tus qauv qhia meej meej tsim los ntawm CIE (International Commission on Illumination). Nws sawv cev rau spectral power distribution (SPD) ntawm nruab nrab sab qaum teb ntuj nruab hnub nruab nrab thaum tav su nyob rau hauv Western Europe - ib tug siv taw tes rau yuav ua li cas nruab nrab nruab hnub nruab hnub tshwm nyob rau hauv tej yam kev mob.

D65 tsis yog xim kub xwb. Nws yog ib tshwj xeeb SPD - ib tug ntiv tes ntawm yuav ua li cas lub zog faib thoob plaws qhov pom spectrum. Thaum koj calibrate ib qho zaub, lub koob yees duab, los yog lub teeb rau D65, koj nyob nraum aligning nws rau qhov no raws nraim spectral duab, tsis yog rau ib tug dav dawb tshuav nyiaj li cas.

6500K txhais li cas
"6500K" yog ib Correlated xim kub (CCT) - nws piav txog lub teeb li cas looks rau tib neeg lub qhov muag, tsis yog li cas nws tau faib spectrally. Lub teeb 6500K tuaj yeem pom pom zoo li lub teeb nruab hnub, tab sis txoj kev uas nws tsim cov tsos tuaj yeem sib txawv heev nyob ntawm LEDs lossis phosphors siv.

Ob lub teeb nrog zoo tib yam 6500K nyeem yuav ua rau muaj qhov sib txawv kiag li thaum pom cov xim lossis xim grey. Qhov ntawd yog vim tias lawv cov SPDs txawv, txawm tias lub ntsuas xim hais tias lawv sib npaug "kub".

Vim Li Cas Cov Muaj Peev Xwm No
Xim-tseem ceeb ua hauj lwm nyob ntawm qhov sib xws thiab raug teeb pom kev zoo. Yog tias koj lub teeb pom kev tsis zoo lossis pom ib puag ncig siv 6500K LED nrog rau qhov tsis txaus ntseeg SPD, koj qhov kev nkag siab ntawm cov xim ntawm lub vijtsam tuaj yeem hloov pauv tau yooj yim - lossis loj heev - piv rau qhov ntsuas D65 siv.

Qhov kev tsis sib haum no yog qhov piv txwv classic ntawm metamerism: ob lub teeb uas zoo ib yam li koj ob lub qhov muag tab sis ua xim txawv ntawm qhov chaw muaj kev cuam tshuam los yog emissive.

Txhua tus neeg uas tau ua haujlwm nrog ob peb tus neeg siv khoom-qib spectrophotometers paub tias tuaj yeem muaj qhov txawv txav ntawm ib tus neeg. Txawm hais tias ntawm peb tus kheej cov neeg siv khoom, qee zaum peb pom cov ntawv ceeb toom ntawm kev nyeem ntawv uas tawm los ntawm ntau npaum li ± 800 K - deb sab nraud ntawm peb cov LEDs, thiab ib yam dab tsi uas yuav pom tseeb yog tias lub teeb lawv tus kheej nyob deb heev. Ib qho, zoo-engineered D65 lub teeb pom kev zoo muab qhov zoo sib xws, ntsuas lub hauv paus uas tshem tawm qhov tsis sib xws. Kev cia siab rau ntau yam, nws tus kheej calibrated meters qhia deb ntau qhov tsis paub tseeb tshaj qhov nws daws tau. Ib qho ruaj khov, spectrally raug siv ua kom txhua qhov chaw thiab chaw ua haujlwm ua raws li tus qauv pom.

Txawm tias qhov zoo tshaj plaws-calibrated zaub tsis tuaj yeem saib qhov tseeb hauv chav teeb los ntawm qhov tsis yog-D65.

D65 Yog Qhov Chaw - 6500K Tsuas Cov Ntsiab Lus hauv Kev Qhia
Thaum ib tug neeg hais tias "6500K," lawv tsuas piav txog ib qhov loj me ntawm cov xim - xim kub, lossis kwv yees li qhov sov lossis txias lub teeb pom. Nws zoo li hais tias koj nyob nraum "ntawm 21st parallel sab qaum teb." Qhov ntawd qhia koj lub latitude, tab sis tsis yog longitude.

Koj tuaj yeem nyob hauv Honolulu, Hawaii (21.3° N, 157.8° W), los yog koj tuaj yeem nyob ib qho ntawm qhov sib npaug ntawm sab qaum teb Africa - ntau txhiab mais deb. Ob leeg yog "21 ° sab qaum teb," tab sis lawv pom tseeb tsis yog tib qho chaw.

D65, ntawm qhov tod tes, zoo li muab ob qho tib si latitude thiab longitude. Nws yog ib qho kev sib koom ua ke ntawm CIE chromaticity daim duab, txhais tsis tau tsuas yog xim kub tab sis kuj zas - qhov deb ntawm lub cev dub locus.

Qhov no yog qhov tseem ceeb vim tias muaj coob tus neeg piav txog lub teeb lossis cov duab saib zoo li "ntsuab ntsuab" lossis "liab magenta dhau." Qhov ntawd tsis yog qhov teeb meem xim kub xwb - nws yog qhov teeb meem tint. Ntsuab / magenta hloov (tej zaum hu ua tint lossis axis deviation) sawv cev rau y-axis ntawm daim duab chromaticity, thaum xim kub sib npaug rau x-axis. D65 txhais ob qho tib si. 6500K tsuas txhais ib qho xwb.

Simulated D65 — thiab yog vim li cas tag nrho peb cov khoom siv nws
Tag nrho MediaLight thiab Ideal-Lume cov khoom lag luam yog Simulated D65 qhov chaw teeb. Qhov ntawd txhais tau hais tias txhua lub teeb thiab kev tsis ncaj ncees lub teeb uas peb ua yog tib neeg tsim los ntawm CIE Standard Illuminant D65 - qhov siv rau nruab hnub nruab hnub siv hauv kev tshaj tawm, zaj duab xis, thiab tom qab tsim khoom ib puag ncig.

Nyob rau hauv ib lub spectrometer, koj tuaj yeem pom tias peb cov LEDs tsis zoo ib yam rau lub hnub ci ntuj - tsis muaj tib neeg tsim lub teeb. Txawm li cas los xij, peb cov kev cai phosphor formulations yog engineered los tsim cov spectral zog faib ntawm D65 nrog tsis tshua muaj siab fidelity thiab xim rendering raug.

Peb hu peb cov khoom Simulated D65 vim nws yog lub sij hawm ncaj ncees thiab technically raug. Ntau lub tuam txhab siv "D65" xws li rau ib qho 6500K lub teeb, txawm tias nws SPD txawv heev ntawm tus qauv tiag. Txog rau thaum lub teeb pom kev zoo tsis txawv ntawm lub hnub ci ntuj, nws yog qhov tseeb los hu nws ua qhov simulation - ib yam li lub pob zeb loj hlob hauv lab yuav zoo ib yam li pob zeb diamond mined tab sis tseem muaj lub luag haujlwm piav qhia raws li kev sim ua.

Hais tias, peb qee zaum siv cov ntsiab lus D65 thiab 6500K me ntsis sib hloov ntawm peb lub vev xaib - tsis yog vim lawv txhais tau tias tib yam, tab sis vim tias feem ntau cov neeg tshawb nrhiav teeb pom kev tsis zoo paub nrhiav "6500K." Nws yog cov lus tseem ceeb uas paub, txawm tias lawv tseem tsis tau paub txog qhov sib txawv ntawm qhov sib txheeb xim kub thiab tus qauv D65. Peb xav ntsib cov neeg lawv nyob qhov twg thiab pab lawv kawm qhov txawv dua li kev pheej hmoo lawv ploj ntawm cov ntaub ntawv raug tag nrho.

Hauv Ntev
• 6500K ≠ D65 — CCT tsuas yog kwv yees seb lub teeb zoo li cas, tsis yog nws coj li cas.
• D65 yog tus qauv tshwj xeeb, txhais los ntawm ob qho tib si chromaticity thiab SPD.
• Tint teeb meem — ntsuab los yog magenta bias feem ntau taw qhia rau deviation ntawm D65.
• Tag nrho MediaLight thiab Ideal-Lume cov khoom siv simulated D65 lub teeb qhov chaw — meej, zoo ib yam, thiab engineered kom raug.
• Qee zaum peb siv D65 thiab 6500K sib hloov vim tias yog lo lus uas tib neeg feem ntau nrhiav, tab sis lawv tsis zoo ib yam.