Menene ƙarancin haske in daukar hoto,akuma menene 0.0001Lux?ƙasahaske yana nufin?

Ma'anar

Haske a zahiri haske ne, kuma ƙarancin haske yana nufin ƙarancin haske, kamar ɗaki mai duhu, ko haske mai ƙarancin haske..

Hasken yanayi (haske) yawanci ana auna shi ne da lux, kuma ƙaramin ƙimar, haka nan yanayin yake duhu. Haka kuma ana auna ma'aunin hasken kyamara da lux. Ƙaramin ƙimar, haka nan kuma ake iya ganin abubuwan da ke cikin duhu da haske. Saboda haka, matakin haske ya zama muhimmin ma'auni ga mutane don zaɓar kyamara.

 

Menene Mafi ƙarancin haske? Menene Jin Daɗi? Menene ma'anar 0.0001 lux??

Haske shine haske akan murabba'in mita 1, naúrar: Lux, wanda a da aka rubuta a matsayin Lux. Mafi ƙarancin haske yana nufin haske lokacin da idon ɗan adam zai iya jin duhu a ƙasa. Jin daɗi yana nufin "amsa ga haske". Akwai nau'ikan jin daɗi daban-daban, jin daɗin idon ɗan adam, jin daɗin fim mara kyau, da jin daɗin bututun ɗaukar hoto. Hasken gida, gabaɗaya 200Lx, 0.0001Lx yana nufin duhu sosai, idanun ɗan adam ba za su iya jin haske ba.

Ƙaramin haske hanya ce ta auna ƙarfin kyamara. Ana amfani da shi don tantance ƙarancin hasken da zai iya kasancewa kuma har yanzu yana samar da hoto mai amfani. An yi kuskuren fassara wannan ƙimar sosai kuma an faɗi ta ba daidai ba saboda babu wani ƙa'ida a masana'antu don bayyana ƙimar lux. Kowane babban masana'antar CCD yana da nasa hanyar gwada ƙarfin kyamarar CCD ɗinsu.

Hanya mafi inganci da inganci don auna ƙarancin haske ana kiranta da hasken manufa. Hasken manufa yana gaya mana adadin haske da kyamarar ke karɓa a zahiri inda saman CCD yake.

DagaTsarin, idan aka yi la'akari da aikin ƙananan haske yana da alaƙa da aƙalla sigogi biyu, ƙimar F ta ruwan tabarau da ƙimar IRE:

Darajar F

Hanya ce ta auna ikon ruwan tabarau na tattara haske. Gilashin tabarau mai kyau zai iya tattara haske da yawa ya kuma haskaka shi zuwa ga na'urar firikwensin CCD. Gilashin F1.4 zai iya tattara haske sau biyu fiye da ruwan tabarau na F2.0. A wata ma'anar, Gilashin F1.0 zai iya tattara haske sau 100 fiye da ruwan tabarau na F10, don haka yana da matukar muhimmanci a sanya alamar ƙimar F a cikin ma'aunin, in ba haka ba sakamakon ba zai zama ma'ana ba.

 

ƙimar IRE

Matsakaicin girman fitowar bidiyon kyamarar gabaɗaya ana saita shi ne a 100IRE ko 700mV. Bidiyon 100IRE yana nufin zai iya tuƙa allo gaba ɗaya tare da mafi kyawun haske da bambanci. Bidiyon da ke da 50IRE kawai yana nufin rabin bambanci ne kawai, Volts 30IRE ko 210mV yana nufin kashi 30% kawai na girman asali, yawanci 30IRE shine mafi ƙarancin ƙima don bayyana hoton da ake da shi, kyamara ta yau da kullun lokacin da aka ƙara yawan riba ta atomatik zuwa matsakaicin riba, matakin hayaniya yakamata ya kasance a 10IRE, don haka zai iya samar da hotuna masu karɓuwa na 3:1 ko 10dB siginar-zuwa-amo. Sakamakon da aka auna a 10 IRE na iya zama sau 10 fiye da sakamakon da aka auna a 100 IRE, don haka sakamako ba tare da ƙimar IRE ba kusan ba shi da ma'ana. Lokacin da hasken yanayi ya ragu, girman bidiyo da ƙimar IRE suna raguwa daidai gwargwado. Lokacin da ake duba aikin kyamara mai ƙarancin haske, ƙimar IRE na iya zama ƙasa, amma dole ne a tabbatar da cewa bidiyon da aka nuna har yanzu yana da ma'ana. Bayan fahimtar ma'aunin ƙarancin haske na hoton, menene matakan ƙarancin haske?

 

Menene yanayin ƙananan haske a cikin kyamara?

Haske Mai Ƙanƙanta yana nufin yanayin ɗaukar hoto mai ƙarancin haske. Haske mai ƙarancin haske yana nufin yanayin da hasken da ke cikin yanayin ɗaukar hoto yake da duhu. A wannan yanayin, idan yanayin ɗaukar hoto na yau da kullun ne, hoton zai yi duhu. Domin inganta aikin ƙaramin haske na kyamara a cikin duhu, manyan kamfanoni suna yin ƙoƙari ta hanyoyi masu zuwa. Ruwan tabarau: A matsayin muhimmin ɓangare na kyamara, ita ce hanyar shiga ta farko don haske ya shiga kyamara, kuma adadin hasken da yake sha kai tsaye yana ƙayyade tsabtar hoton. Yawanci, ana amfani da adadin "hasken shigowa" don auna ikon ruwan tabarau na shan haske, kuma adadin hasken da ke shiga ruwan tabarau za a iya bayyana shi ta hanyar ƙimar F (ma'aunin tsayawa). F darajar = f (tsawon haske mai ƙarfi) / D (buɗewar haske mai tasiri), wanda ya yi daidai da buɗewa kuma ya yi daidai da tsayin mai hankali. A ƙarƙashin yanayin tsawon mai hankali iri ɗaya, idan kun zaɓi ruwan tabarau mai babban buɗewa, adadin hasken da ke shiga ruwan tabarau zai ƙaru, wato, kuna buƙatar zaɓar ruwan tabarau mai ƙaramin ƙimar F.

 

Na'urar firikwensin hoto ita ce hanya ta biyu da haske zai shiga kyamara, inda hasken da ke shigowa daga ruwan tabarau zai samar da siginar lantarki. A halin yanzu, akwai na'urori masu auna firikwensin guda biyu, CCD da CMOS. Tsarin kera CCD yana da rikitarwa kuma fasahar tana hannun masana'antun Japan da dama. Siffofi na ƙarancin farashi, ƙarancin amfani da wutar lantarki da haɗin kai mai yawa. Duk da haka, tare da ci gaba da haɓaka fasahar CMOS, gibin da ke tsakanin CCD da CMOS yana raguwa a hankali. Sabuwar ƙarni na CMOS ya inganta rashin jin daɗi sosai kuma ya zama babban abin da ake amfani da shi a fagen kyamarori masu auna firikwensin. Kyamarorin cibiyar sadarwa masu auna firikwensin CMOS masu auna firikwensin ...

Idan kuna sha'awar matakin taurari na Hampo 03-0318module ɗin kyamara mai ƙarancin haske, barka da zuwa don yin shawara da mu!