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Ilimi game da sigogin ruwan tabarau (wannan labarin za a iya raba zuwa ɗaya ko biyu bisa ga abun ciki)

1. Girman hoto

Girman hoton kuma shine girman allo;

Girman hoton firikwensin:

Ci gaba da amfani da daidaitaccen girman tsarin bututun kamara, shine girman diamita na waje na bututun kamara.

2. Tsawon hankali

Ma'anar tana nufin nisa daga tsakiyar ruwan tabarau zuwa wuri mai mahimmanci na taro na haske. Har ila yau, nisa daga tsakiyar ruwan tabarau zuwa hoton hoto na firikwensin firikwensin a cikin module. Tsawon tsayin daka yana da matukar muhimmanci. bayanai, kuma za a yi amfani da shi a cikin lissafin zurfin filin da FOV a nan gaba.

3. Hankali

Akwai nau'ikan ruwan tabarau guda uku: ma'auni, mai faɗin kusurwa, da ruwan tabarau na telephoto.

Ko da yake yankin da idon ɗan adam ke iya gani zai iya kaiwa digiri 180, kusurwar da za ta iya gane siffar da launi da gaske yana da kusan digiri 50. Gabaɗaya, kusurwar kallon allon taɓawa yana da digiri 55 zuwa digiri 65.Tabbas, yakamata ya dogara ne akan ainihin bukatun abokan ciniki; Ka'idodin seesaw, masana'antun Lens suna fatan zayyana babban filin ra'ayi wanda zai iya dacewa da na'urori masu auna firikwensin da yawa, amma mafi girman filin ra'ayi, mafi girman aberration na chromatic wanda ke buƙata. a yi nasara.

4.Chromatic aberration

Ruwan tabarau na hoto ba zai iya dawo da gaba ɗaya aya ko hoton haske mai tsayin tsayin daka zuwa maƙasudi ba, amma tabo mai yaɗuwa;siffar jirgin abu ba jirgin sama ba ne, a'a sama mai lankwasa ne, kuma hoton ya rasa kamanni.Ana kiran waɗannan lahani na hoto chromatic aberrations.

5. Zurfin Filin & Zurfin Mayar da hankali

(1) Zurfin Filin & Zurfin Mayar da hankali
Kafin da kuma bayan mayar da hankali, hasken yana fara tattarawa yana yaduwa, kuma hoton wurin ya zama mai duhu, yana samar da da'irar girma.Ana kiran wannan da'irar da'irar rudani.

A zahiri, hoton da aka ɗauka ana kallon ta wata hanya (kamar tsinkaya, haɓakawa cikin hoto, da sauransu).Hoton da ido tsirara ke ji yana da kyakkyawar alaƙa tare da haɓakawa, nisa tsinkaya da nisa kallo.Idan diamita na da'irar rikice ya yi ƙasa da ikon nuna bambanci na idon ɗan adam, ba za a iya gane blur da ainihin hoton ya haifar a cikin kewayon dangi ba.Wannan da'irar rudani da ba za a iya gane ta ba ita ake kira da'irar rudani da ta halatta.

(2) zurfin filin
Akwai da'irar da'irar da'irar da aka halatta kafin da kuma bayan wurin mai da hankali, kuma nisa tsakanin da'irar rikice-rikicen biyu ana kiransa zurfin hankali.Kafin da kuma bayan batun (mayar da hankali), hoton har yanzu yana da fayyace kewayon, wanda shine zurfin filin.Wato zurfin gaba da baya na abin da ake magana a kai da kuma matakin blur hoto a saman fim din duk suna cikin iyakar da'irar rudani da aka halatta.
Zurfin filin ya bambanta tare da tsayin mai da hankali na ruwan tabarau, ƙimar buɗewa, da nisan harbi.Don tsayayyen tsayi mai tsayi da tazarar harbi, ƙaramar buɗewar da aka yi amfani da ita, mafi girman zurfin filin.Ka'idar soyayya ta lumshe ido.

(3) Misali
Nazarin shari'a, CNF7246, Lens DS628A
Siga, EFL=2.94mm FNO=2.0 SENSOR PIXEL SIZE=1.75um

(4) Vcm wani mummunan yanayin mayar da hankali
Rashin hankali kusa
Lokacin zayyana Mai riƙe, bugun mayar da hankali na ruwan tabarau daga nesa zuwa kusa zai kasance cikin kewayon VCM.Idan ba a tsara tsayin Mai riƙe da kyau ba, mai riƙe da ruwan tabarau kusa da mayar da hankali zai bayyana, yana haifar da rashin kulawa kusa.

6.Gwaji

Abin da ake kira murdiya yana nufin matakin da madaidaiciyar layi ke juyawa zuwa lanƙwasa bayan harbi ta cikin ruwan tabarau.An ƙididdige matakin murdiya a matsayin kashi na canji na girman hoto zuwa madaidaicin girman hoto. Ƙaddamarwar idon ɗan adam zuwa kusurwa shine 1 minti na radian, wanda shine kusan 1/60 na digiri 1, kuma yana da kyau sosai. mai kula da madaidaiciya da karkatar layin.Sabili da haka, yawancin ruwan tabarau na gani na gani suna damuwa sosai game da karkatar da kusurwar filin girma, yawanci ana saita a 2%.

7.Hasken dangi

Ra'ayi, rabon haske na filin kallo tare da axis na gani zuwa cikakken filin kallo akan jirgin sama, wato, rabon kusurwoyi na diagonal na firikwensin hoton zuwa matsakaicin haske, wannan darajar yana iyakance ta hanyar cos4θ Theorem na haskakawa, kuma sasanninta yanki ne naúrar Hasken jujjuyawar hasken haske yana da ƙasa kaɗan, amma ba ƙasa da ƙasa ba har akwai abin mamaki na vignetting.


Lokacin aikawa: Oktoba-08-2021