Nau'o'i naruwan tabarau na masana'antuhawa

Akwai nau'ikan hanyoyin sadarwa guda huɗu, wato F-mount, C-mount, CS-mount da M12 mount. F-mount ɗin haɗin gwiwa ne na gabaɗaya, kuma gabaɗaya ya dace da ruwan tabarau waɗanda tsawonsu ya fi 25mm. Idan tsawon ruwan tabarau na haɗin gwiwa bai kai kusan 25mm ba, saboda ƙaramin girman ruwan tabarau na haɗin gwiwa, ana amfani da C-mount ko CS-mount, kuma wasu suna amfani da hanyar haɗin gwiwa ta M12.

Bambanci tsakanin C mount da CS mount

Bambancin da ke tsakanin hanyoyin sadarwa na C da CS shine cewa nisan da ke tsakanin saman hulɗar ruwan tabarau da kyamara zuwa saman haske na ruwan tabarau (matsayin da firikwensin daukar hoto na CCD ya kamata ya kasance) ya bambanta. Nisa tsakanin hanyoyin sadarwa na C-mount shine 17.53mm.

Za a iya ƙara zoben adaftar C/CS mai tsawon mm 5 a cikin ruwan tabarau na CS-mount, don a iya amfani da shi tare da kyamarorin nau'in C.

Bambanci tsakanin C mount da CS mount

Sigogi na asali na ruwan tabarau na masana'antu

Filin kallo (FOV):

FOV yana nufin kewayon abin da aka lura, wato, ɓangaren abin da firikwensin kyamara ya kama. (Jerin filin kallo wani abu ne da dole ne a fahimta a cikin zaɓin)

Filin kallo

Nisa Aiki (WD):

Yana nufin nisan da ke tsakanin gaban ruwan tabarau zuwa abin da ake gwadawa. Wato, nisan saman don ɗaukar hoto mai haske.

ƙuduri:

Mafi ƙarancin girman fasalin da za a iya rarrabewa akan abin da aka duba wanda tsarin hoto zai iya aunawa. A mafi yawan lokuta, ƙaramin filin kallo, mafi kyawun ƙuduri.

Zurfin ra'ayi (DOF):

Ikon ruwan tabarau na kiyaye ƙudurin da ake so lokacin da abubuwa suka fi kusa ko nesa da mafi kyawun abin da aka mayar da hankali a kai.

Zurfin gani

Sauran sigogi naruwan tabarau na masana'antu

Girman guntu mai sauƙin ɗaukar hoto:

Girman yanki mai tasiri na guntuwar firikwensin kyamara, gabaɗaya yana nufin girman kwance. Wannan siga yana da matuƙar mahimmanci don tantance madaidaicin sikelin ruwan tabarau don samun filin gani da ake so. Rabon girman ruwan tabarau na farko (PMAG) ana bayyana shi ta hanyar rabon girman guntuwar firikwensin zuwa filin gani. Kodayake sigogi na asali sun haɗa da girma da filin gani na guntu mai saurin daukar hoto, PMAG ba siga ce ta asali ba.

Girman guntu mai sauƙin ɗaukar hoto

Tsawon maƙasudi (f):

"Tsawon mai da hankali shine ma'auni na yawan haske ko bambancin da ke cikin tsarin gani, wanda ke nufin nisan daga tsakiyar ruwan tabarau zuwa wurin tattara haske. Hakanan shine nisan daga tsakiyar ruwan tabarau zuwa filin daukar hoto kamar fim ko CCD a cikin kyamara. f={nisan aiki/filin kallo gefe mai tsawo (ko gajere gefe)}XCCD gefe mai tsawo (ko gajere gefe)

Tasirin tsayin mai da hankali: ƙaramin tsayin mai da hankali, mafi girman zurfin filin; ƙaramin tsayin mai da hankali, mafi girman karkacewa; ƙaramin tsayin mai da hankali, mafi girman abin da ke faruwa a cikin vignetting, wanda ke rage haske a gefen rashin daidaituwar.

ƙuduri:

Yana nuna mafi ƙarancin tazara tsakanin maki 2 da za a iya gani ta hanyar saitin ruwan tabarau na zahiri

0.61x da aka yi amfani da shi a tsawon tsayi (λ) / NA = ƙuduri (μ)

Hanyar lissafin da ke sama za ta iya ƙididdige ƙudurin a ka'ida, amma ba ta haɗa da karkacewa ba.

※ Tsawon tsayin da aka yi amfani da shi shine 550nm

Ma'anar:

Ana iya ganin adadin layukan baƙi da fari a tsakiyar 1mm. Naúrar (lp)/mm.

MTF (Aikin Canja wurin Daidaitawa)

MTF

Ɓarna:

Ɗaya daga cikin alamun auna aikin ruwan tabarau shine rashin daidaituwa. Yana nufin layin madaidaiciya a wajen babban axis a cikin jirgin saman abin da ke cikin abin, wanda ya zama lanƙwasa bayan an nuna shi ta hanyar tsarin gani. Kuskuren hoton wannan tsarin gani ana kiransa karkacewa. Rashin daidaituwar karkacewa yana shafar yanayin hoton ne kawai, ba kaifin hoton ba.

Buɗewa da Lambar F:

Takardar lenticular na'ura ce da ake amfani da ita don sarrafa adadin hasken da ke ratsa ruwan tabarau, yawanci a cikin ruwan tabarau. Muna amfani da ƙimar F don bayyana girman buɗewa, kamar f1.4, F2.0, F2.8, da sauransu.

Buɗewa da Lambar F

Ƙara girman gani:

Tsarin da aka yi amfani da shi don ƙididdige babban rabon sikelin shine kamar haka: PMAG = girman firikwensin (mm) / filin gani (mm)

Ƙara girman nuni

Ana amfani da girman nuni sosai a na'urar hangen nesa (microscope). Girman nuni na abin da aka auna ya dogara ne akan abubuwa uku: girman haske na ruwan tabarau, girman guntu na firikwensin kyamarar masana'antu (girman saman da aka nufa), da girman nunin.

Girman nuni = girman tabarau na gani × girman nuni × 25.4 / girman diagonal na rake

Babban nau'ikan ruwan tabarau na masana'antu

Rarrabawa

• Ta hanyar tsayin daka: firam da zuƙowa

•Ta hanyar buɗewa: buɗewa mai kauri da buɗewa mai canzawa

•Ta hanyar hanyar sadarwa: hanyar sadarwa ta C, hanyar sadarwa ta CS, hanyar sadarwa ta F, da sauransu.

• An raba ta da abubuwa da yawa: gilashin ƙara girma mai ƙarfi, ruwan tabarau mai ci gaba da zuƙowa

• Gilashin tabarau masu mahimmanci da aka saba amfani da su a masana'antar hangen nesa na na'ura galibi sun haɗa da ruwan tabarau na FA, ruwan tabarau na telecentric da na'urorin microscope na masana'antu, da sauransu.

Manyan abubuwan da ya kamata a yi la'akari da su wajen zabar waniGilashin hangen nesa na na'ura:

1. Fagen gani, girman gani da kuma nisan aiki da ake so: Lokacin zabar ruwan tabarau, za mu zabi ruwan tabarau mai girman fili fiye da abin da za a auna, domin sauƙaƙe sarrafa motsi.

2. Zurfin buƙatun filin: Ga ayyukan da ke buƙatar zurfin filin, yi amfani da ƙaramin rami gwargwadon iyawa; lokacin zaɓar ruwan tabarau mai girman girma, zaɓi ruwan tabarau mai ƙarancin girma gwargwadon yadda aikin ya ba da dama. Idan buƙatun aikin sun fi wahala, ina zaɓar ruwan tabarau mai kyau tare da zurfin filin.

3. Girman firikwensin da kuma hanyar sadarwa ta kyamara: Misali, ruwan tabarau mai girman inci 2/3 yana goyon bayan babban saman rake na kyamara na masana'antu wanda girmansa ya kai inci 2/3, ba zai iya tallafawa kyamarorin masana'antu da suka fi inci 1 girma ba.

4. Akwai sarari: Ba zai yiwu ba ga abokan ciniki su canza girman kayan aikin idan tsarin ba shi da zaɓi.