Menene ƙananan haske in daukar hoto,ada abin da yake 0.0001 Luxƙanananhaskaka nufi?

Ma'anarsa

Haskakawa shine haƙiƙa haske, ƙarancin haske yana nufin ƙaramin haske, kamar ɗaki mai duhu, ko haske mai ƙarancin haske..

Hasken yanayi (haske) yawanci ana auna shi cikin lux, kuma ƙarami ƙimar, yanayin duhu.Hakanan ana auna fihirisar hasken kamara cikin lux.Ƙananan ƙimar, mafi girma da hankali da kuma bayyana abubuwan da ke cikin duhu za a iya gani.Saboda haka, matakin haske ya zama muhimmin ma'auni don mutane su zaɓi kyamara.

 

Menene mafi ƙarancin haske?Menene Hankali?Menene ma'anar 0.0001 lux?

Haske shine haske akan murabba'in mita 1, naúrar: Lux, wanda aka rubuta a baya azaman Lux.Karamin haske yana nufin haskakawa lokacin da idon ɗan adam zai iya jin faɗuwar rana a ƙasa.Hankali yana nufin "amsa ga haske".Akwai nau'o'in hankali iri-iri, halayen ido na ɗan adam, halayen fim mara kyau, da tsinkayen bututu mai ɗaukar hoto.Hasken gida, gabaɗaya 200Lx, 0.0001Lx yana nufin duhu sosai da duhu, idon ɗan adam baya jin hasken.

Mafi ƙarancin haske hanya ce don auna hankalin kamara.Ana amfani da shi don ƙayyade yadda ƙananan hasken zai iya zama kuma har yanzu yana samar da hoto mai amfani.An yi kuskuren fassara wannan ƙima kuma an yi kuskuren fassarori saboda babu ma'aunin masana'antu don kwatanta ƙimar lux.Kowane manyan masana'antun CCD suna da nasu hanyar gwada hankalin kyamarorinsu na CCD.

Hanya mafi inganci da daidaito don auna mafi ƙarancin haske ana kiranta hasken manufa.Hasken manufa yana gaya mana nawa ne ainihin hasken da ke karɓar hoton jirgin sama na kyamarar inda saman CCD yake.

DagaTsarin, yin hukunci mai ƙarancin haske yana da alaƙa da aƙalla sigogi biyu, ƙimar F na ruwan tabarau da ƙimar IRE.:

F darajar

Hanya ce don auna ƙarfin ruwan tabarau don tattara haske.Kyakkyawan ruwan tabarau na iya tattara ƙarin haske kuma ya haskaka shi zuwa firikwensin CCD.Ruwan tabarau na F1.4 na iya tattara haske sau 2 fiye da ruwan tabarau na F2.0.A wasu kalmomi, ruwan tabarau na F1.0 na iya tattara haske sau 100 fiye da ruwan tabarau na F10, don haka yana da matukar muhimmanci a sanya alamar F a cikin ma'auni, in ba haka ba sakamakon zai zama marar ma'ana.

 

Darajar IRE

Matsakaicin girman fitowar bidiyo na kamara gabaɗaya an saita shi a 100IRE ko 700mV.Bidiyo na 100IRE yana nufin cewa zai iya fitar da mai saka idanu gabaɗaya tare da mafi kyawun haske da bambanci.Bidiyo tare da 50IRE kawai yana nufin kawai rabin bambanci, 30IRE ko 210mV Volts yana nufin kawai 30% na amplitude na asali, yawanci 30IRE shine mafi ƙarancin ƙimar don bayyana hoton da ke akwai, daidaitaccen kamara lokacin da riba ta atomatik ta karu zuwa matsakaicin riba, Matsayin amo ya kamata ya kasance a 10IRE, don haka zai iya samar da 3: 1 ko 10dB siginar-zuwa-amo rabo hotuna masu karɓa.Sakamakon da aka auna a 10 IRE zai iya zama sau 10 sama da sakamakon da aka auna a 100 IRE, don haka sakamakon ba tare da ƙimar IRE ba a zahiri ba shi da ma'ana.Lokacin da hasken yanayi ya ragu, duka girman girman bidiyo da ƙimar IRE suna raguwa daidai.Lokacin nazarin aikin ƙananan haske na kyamara, ƙimar IRE na iya zama ƙasa, amma dole ne a tabbatar da cewa bidiyon da aka nuna yana da ma'ana.Bayan fahimtar ma'auni na ƙananan haske na hoton, menene matakan ƙananan haske?

 

Menene Yanayin Ƙananan haske a cikin kamara?

Ƙananan Haske yana nufin yanayin harbi mai ƙarancin haske.Ƙananan haske yana nufin yanayin da haske a cikin yanayin harbi ya kasance duhu.A wannan yanayin, idan yanayin harbi na yau da kullun, hoton zai yi duhu.Domin inganta ƙarancin haske na kyamarar a cikin duhu, manyan samfuran suna yin ƙoƙari a cikin waɗannan kwatance.Lens: A matsayin wani muhimmin bangare na kyamara, ita ce ƙofar farko don haske ya shiga cikin kyamarar, kuma adadin hasken da yake ɗauka yana tabbatar da tsabtar hoton.Yawanci, ana amfani da adadin “hasken da ke shigowa” don auna ƙarfin ruwan tabarau don ɗaukar haske, kuma adadin hasken da ke shiga cikin ruwan tabarau na iya bayyana ta ƙimar F (tsayawa coefficient).F darajar = f (tsawon ruwan tabarau) / D (ruwan tabarau mai tasiri mai tasiri), wanda ya yi daidai da buɗaɗɗen buɗewa da kuma daidai da tsayin mai da hankali.A ƙarƙashin yanayin tsayin tsayin daka, idan kun zaɓi ruwan tabarau tare da buɗewa mafi girma, adadin hasken da ke shiga cikin ruwan tabarau zai karu, wato, kuna buƙatar zaɓar ruwan tabarau tare da ƙaramin darajar F.

 

Na'urar firikwensin hoto ita ce ƙofar ta biyu don haske ya shiga kyamara, inda hasken da ke shiga daga ruwan tabarau zai samar da siginar lantarki.A halin yanzu, akwai na'urori masu auna firikwensin guda biyu, CCD da CMOS.Tsarin ƙera CCD yana da ɗan rikitarwa kuma fasahar ta kasance mai iko a hannun masana'antun Japan da yawa.Siffofin ƙananan farashi, ƙananan amfani da wutar lantarki da babban haɗin kai.Koyaya, tare da ci gaba da haɓaka fasahar CMOS, rata tsakanin CCD da CMOS yana raguwa a hankali.Sabuwar ƙarni na CMOS ya inganta rashin hankali sosai kuma ya zama babban abu a fagen manyan kyamarori.Ƙananan kyamarori masu ma'ana na cibiyar sadarwa suna amfani da firikwensin CMOS masu hankali.Bugu da ƙari, girman firikwensin kuma zai shafi tasirin ƙananan haske.A ƙarƙashin yanayin haske iri ɗaya, ƙarami girman, mafi muni da ƙarancin haske na kyamara tare da mafi girman pixels.

Idan kuna sha'awar matakin tauraro 03-0318ƙananan kyamarar kyamara, maraba don tuntuɓar mu!