Uma ubona okuthi “6500K” kufakwe kuhlu kusibani, kulula ukucabanga ukuthi kusho ukuthi “D65.” Phela, zombili izinombolo zibhekisela emini - akunjalo? Hhayi impela. Ngenkathi i-6500K ne-D65 zihlobene, zihlobene hhayi into efanayo, futhi ukuqonda umehluko kubalulekile uma umgomo wakho kuwukunemba kombala.

Ungase ucabange ukuthi umbala wokukhanya kwegumbi lakho awuthinti okusesibonisini sakho — phela isikrini sikhipha ukukhanya kunokuba sikubonise.

Kodwa lokho kuyiqiniso elingaphelele. Ukukhanya okuzungezile esikrinini sakho kune- umphumela ophambene kulokho okubonayo esibukweni. Isibonelo, uma ukukhanya kwegumbi lakho kunombala oluhlaza okotshani, amehlo akho angase ahumushe isikrini njenge-magenta kancane; uma ukukhanya kwegumbi kuyi-magenta, isibonisi sakho singase sibonakale siluhlaza. Kungakho ungabheka i-MacBook yakho bese uzibuza ukuthi kungani ibukeka “ibomvu kakhulu” — noma kungani isithombe sakho se-TV sibukeka sipholile ngendlela exakile noma sifudumele — kanti empeleni, ukukhanya kwegumbi kushintsha isisekelo sakho sokubuka.

Yini I-D65 Empeleni
I-“D65” iyisibani esijwayelekile esichazwe ngokunembile esisungulwe yi-CIE (Ikhomishini Yomhlaba Wonke Yokukhanyisa). Imele i-spectral power distribution (SPD) yesilinganiso sokukhanya kwesibhakabhaka esisenyakatho emini emini eNtshonalanga Yurophu - indawo eyireferensi yokuthi ukukhanya kwemini okumaphakathi kuvela kanjani ngaphansi kwezimo zemvelo.

I-D65 ayilona nje izinga lokushisa lombala. Kuyi-a i-SPD ethile - isigxivizo somunwe sokuthi amandla asakazwa kanjani ku-spectrum ebonakalayo. Uma ulinganisa isibonisi, ikhamera, noma ukukhanya ku-D65, ukuqondisa kulokhu isimo se-spectral esiqondile, hhayi nje ukulinganisa okumhlophe okujwayelekile.

Kusho ukuthini u-6500K
I-"6500K" ingu-a izinga lokushisa lombala elihlobene (CCT) - ichaza indlela ukukhanya Kubukeka esweni lomuntu, hhayi ukuthi isatshalaliswa kanjani ngendlela ebukekayo. Ukukhanya okungu-6500K kungabukeka kufane nokukhanya kwasemini, kodwa indlela okukhiqiza ngayo lokho kubukeka kungahluka kakhulu kuye ngama-LED noma ama-phosphor asetshenzisiwe.

Izibani ezimbili ezinokufundwa okufanayo kwe-6500K zingaveza imiphumela ehluke ngokuphelele uma zikhanyisa imibala noma izindawo ezimpunga. Lokho kungenxa yokuthi ama-SPD abo ayahluka, noma imitha yombala ithi abelana “ngezinga lokushisa” elifanayo.

Kungani Lokhu Kubalulekile
Umsebenzi obalulekile wombala uncike ekukhanyeni okungaguquki nokunembile. Uma ukuchema kwakho ukukhanya noma indawo yokubuka isebenzisa i-LED engu-6500K ene-SPD engaqondakali, umbono wakho wemibala ekusikrini ungashintsha kancane - noma ngokumangalisayo - uma kuqhathaniswa nereferensi ye-D65 elinganiselwe.

Lokhu kungafani kuyisibonelo sakudala se i-metamerism: izibani ezimbili ezibonakala zifana namehlo akho kodwa zinikeza imibala ngendlela ehlukile endaweni ekhanyayo noma ephumayo.

Noma ubani osebenze ngama-spectrophotometer ambalwa ebanga lomthengi uyazi ukuthi kungaba khona umehluko omkhulu phakathi kwamayunithi ngamanye. Ngisho naphakathi kwamakhasimende ethu, ngezinye izikhathi sibona imibiko yokufundwayo ecishe ifike ku-±800 K - ngaphandle kakhulu kokubekezelelwa okuhlanganisiwe kwama-LED ethu, futhi into ebingaba sobala uma izibani ngokwazo bezikude kangako. Umthombo wokukhanya we-D65 owodwa, oklanywe kahle unikeza isisekelo esingaguquki, esilinganisekayo esisusa lokhu kungafani. Ukuthembela kumamitha amaningi, alinganiswe ngokuzimele kwethula ukungaqiniseki okukhulu kunalokho okukuxazululayo. Ireferensi ezinzile, enembile ngokubukeka igcina isibonisi nendawo yokusebenza iqondaniswe nezinga elifanayo lokubuka.

Ngisho nesibonisi esilinganiselwe kakhulu asikwazi ukubukeka sinembile egumbini elikhanyiswe umthombo ongewona we-D65.

I-D65 Iyindawo — 6500K Imaphuzu Nje Ngesikhombisi-ndlela
Uma umuntu ethi “6500K,” uchaza kuphela ubukhulu obubodwa bombala — izinga lokushisa lombala, noma cishe ukuthi ukukhanya kuvela kufudumele noma kupholile kangakanani. Kufana nokuthi “ukwi-21st parallel enyakatho.” Lokho kukutshela i-latitude, kodwa hhayi i-longitude.

Ungangena Honolulu, Hawaii (21.3° N, 157.8° W), noma ungaba ndawana thize endaweni efanayo enyakatho ye-Afrika—uqhele ngezinkulungwane zamakhilomitha. Zombili zingu-“21° enyakatho,” kodwa ngokusobala aziyona indawo efanayo.

I-D65, ngakolunye uhlangothi, ifana nokunikeza kokubili i-latitude ne-longitude. Iwukuxhumanisa okunembayo kumdwebo we-CIE chromaticity, ongachazi izinga lokushisa lombala kuphela kodwa tint — ibanga ukusuka endaweni emnyama.

Lokhu kubalulekile ngoba abantu abaningi bachaza izibani noma izibonisi njengokuthi zibukeka "luhlaza kakhulu" noma "i-magenta kakhulu." Lokho akuyona nje inkinga yokushisa kombala - kuyinkinga ye-tint. Ukushintsha okuluhlaza/kwe-magenta (ngezinye izikhathi okubizwa ngokuthi ukuchezuka kwe-tint noma i-eksisi) kumele i-axis ka-y kumdwebo we-chromaticity, kuyilapho izinga lokushisa lombala lihambisana cishe ne-eksisi engu-x. I-D65 ichaza kokubili. 6500K ichaza eyodwa kuphela.

I-D65 Eyenziwe — nokuthi Kungani Yonke Imikhiqizo Yethu Iyisebenzisa
Yonke imikhiqizo ye-MediaLight ne-Ideal-Lume ikhona Okulingisa i-D65 imithombo yokukhanya. Lokho kusho ukuthi zonke izibani nokukhanya okuchemile esikwenzayo kuwukulingisa okwenziwe umuntu kwe-CIE Standard Illuminant D65 — ireferensi yokukhanya kwemini okumaphakathi okusetshenziselwa ukusakaza, ifilimu, nezimo zangemuva kokukhiqizwa.

Ngaphansi kwe-spectrometer, ungabona ukuthi ama-LED ethu awafani nokukhanya kwemini kwemvelo — akukho ukukhanya okwenziwe umuntu okufanayo. Kodwa-ke, ukwakheka kwethu kwangokwezifiso kwe-phosphor kwenzelwe ukukhiqiza kabusha ukusatshalaliswa kwamandla e-spectral ye-D65 enokwethembeka okuphezulu kakhulu nokunemba kokunikeza umbala.

Sibiza imikhiqizo yethu Okulingisa i-D65 ngoba yitemu elithembekile nelilungile ngokobuchwepheshe. Izinkampani eziningi zisebenzisa i-“D65” ngokunganaki kunoma yikuphi ukukhanya okungu-6500K, nanoma i-SPD yayo ihluke kakhulu kwezinga langempela. Kuze kube yilapho umthombo wokukhanya wokwenziwa ungabonakali kusukela ekukhanyeni kwasemini kwemvelo, kunembile ukukubiza ngokulingisa — njengoba nje nedayimane elikhule elebhu lingabukeka lifana nedayimane elimbiwayo kodwa lisachazwa ngokuzibophezela njengelenziwe elebhu.

Lokho kusho, ngezinye izikhathi sisebenzisa imigomo D65 futhi 6500K ngandlela-thile kuwebhusayithi yethu - hhayi ngoba besho into efanayo, kodwa ngenxa yokuthi abantu abaningi abafuna ukukhanyisa okuchemile bayazi ukubheka "6500K." Igama elingukhiye elijwayelekile, ngisho noma bengakawazi umehluko phakathi kwezinga lokushisa lombala ohlobene kanye nezinga le-D65. Kungcono sihlangane nabantu lapho bekhona futhi sibasize bafunde umehluko kunokuba engozini baphuthelwe ulwazi olunembile ngokuphelele.

Kafushane
• 6500K ≠ D65 — I-CCT ilinganisela kuphela indlela ukukhanya okubukeka ngayo, hhayi indlela eziphatha ngayo.
• I-D65 iyindinganiso ethile, echazwa kokubili i-chromaticity ne-SPD.
• I-Tint ibalulekile - ukuchema okuluhlaza noma oku-magenta kuvame ukukhomba ukuchezuka ku-D65.
• Yonke imikhiqizo ye-MediaLight ne-Ideal-Lume isebenzisa imithombo yokukhanya ye-D65 Elingisayo — enembile, engaguquki, futhi yakhelwe ukunemba.
• Kwesinye isikhathi sisebenzisa i-D65 ne-6500K ngokushintshana ngoba lelo yigama abantu abaningi abaliseshayo, kodwa awafani ngokobuchwepheshe.