Taw qhia
Thaum koj nyeem lub koob yees duab module cov specs, koj feem ntau pom qee yam xws li "f=2.8mm" lossis "f=4.0mm." Qhov ntawd yog qhov focal ntev. Hauv cov ntsiab lus yooj yim, focal ntev txiav txim siab li cas "zoomed hauv" lossis "zoomed tawm" koj lub koob yees duab saib yog li cas. Nws cuam tshuam ntau npaum li cas ntawm ib qho chaw koj pom thiab cov khoom loj npaum li cas tshwm sim. Xaiv qhov ntev focal ntev yog qhov tseem ceeb rau txhua daim ntawv thov -los ntawm araspberry pi koob yees duab modulerau qhov project hobby rau tus kws tshaj lijai lub koob yees duab modulerau kev soj ntsuam ntse. Ntawm Kev Ntseeg, peb tau tsim lub koob yees duab modules rau ntau tshaj 30 xyoo, thiab focal ntev yog ib qho ntawm cov tsis tseem ceeb uas peb pab cov neeg siv khoom optimize. Kab lus no piav qhia qhov ntev focal ntev npaum li cas thiab yuav xaiv qhov zoo li cas.
Focal Length yog dab tsi?
Focal ntev yog qhov kev ncua deb ntawm qhov chaw kho qhov muag ntawm lub lens mus rau cov duab sensor thaum lub ntsiab lus tseem ceeb. Nws ntsuas hauv millimeter (mm). Lub focal ntev luv dua (piv txwv li, 2.8mm) muab qhov pom dav dua -koj pom ntau qhov chaw, tab sis cov khoom tshwm me me. Qhov ntev focal ntev (piv txwv li, 8mm) muab qhov pom nqaim dua -koj pom tsawg dua, tab sis cov khoom tshwm loj dua.
Xav txog nws zoo li lub raj: lub raj luv luv cia koj pom thaj chaw dav; ib lub raj ntev zooms nyob rau hauv ib yam dab tsi nyob deb.
Focal Length cuam tshuam li cas rau cov duab
| Focal Length | Field of View | Yam Khoom Loj | Kev siv yam |
|---|---|---|---|
| Luv (2.5-3.5mm) | Dav (70℃-120 degree) | Me me | Kev ruaj ntseg, endoscopy, automotive |
| Nruab nrab (4-6mm) | Standard (50℃-70 degree) | Ntuj | Webcams, kev soj ntsuam dav dav |
| Ntev (8-16mm) | Nqaim (20℃-50 degree) | Loj dua | Kev soj ntsuam ntev ntev |
Focal Length nyob rau hauv lub koob yees duab modules
Hauv feem ntaucmos module koob yees duabmodules, lub focal ntev yog tsau (lub lens hloov tsis tau). Qhov no ua rau lub module me me, pheej yig, thiab txhim khu kev qha. Piv txwv suav nrogusb endoscope koob yees duab modulethiabraspberry pi koob yees duab module. Qee cov modules muaj varifocal lossis autofocus lo ntsiab muag, tab sis cov no loj dua thiab kim dua.
Vim li cas Focal Length Matters
1. Field of View (FOV)
FOV yog qhov ntau npaum li cas ntawm qhov chaw uas lub koob yees duab tuaj yeem ntes tau. Qhov dav FOV (luv focal ntev) cia koj pom ntau yam tsis tau txav lub koob yees duab. Piv txwv li, ausb endoscope koob yees duab moduleKev tshuaj xyuas cov yeeb nkab xav tau qhov dav FOV kom pom tag nrho cov yeeb nkab phab ntsa. Qhov nqaim FOV (ntev focal ntev) zoo dua rau kev nyeem ntawv nyob deb.
2. Yam Ntxim Saib Ntxim Ua
Ntev focal ntev ua kom pom cov khoom nyob deb, muab kev nthuav dav ntxiv rau koj. Tab sis nws txo FOV. Muaj kev lag luam tawm: dav pom piv rau siab nthuav dav.
3. Qhov tob ntawm teb
Qhov ntev focal ntev lo ntsiab muag feem ntau muaj qhov tob ntawm qhov loj dua, lub ntsiab lus ntau dua ntawm qhov xwm txheej nyob twj ywm hauv kev ua kom pom tseeb (zoo rau endoscopy). Ntev focal ntev muaj qhov tob tob ntawm qhov chaw, uas tuaj yeem pab ua kom pom qhov muag plooj.
Focal Length los ntawm Daim Ntawv Thov
| Daim ntawv thov | Pom zoo Focal Length | Yog vim li cas |
|---|---|---|
| Kev kho mob endoscopy | 2.5-3.5 hli | Kev pom dav, qhov tob ntawm qhov loj |
| Kev tshuaj xyuas yeeb nkab | 2.8-4.0 hli | Saib hauv cov kav dej |
| Kev ruaj ntseg (chav) | 2.8-4.0 hli | Npog cheeb tsam dav |
| Kev ruaj ntseg ( daim ntawv tso cai) | 6-12 hli | Paub meej nyob deb |
| Webcam | 3.5-4.5 hli | Ntuj pom |
| AI lub koob yees duab module | 3.0-6.0 hli | Sib npaug ntawm FOV thiab nthuav dav |
| Raspberry Pi tej yaam num | 3.0-4.0 hli | Ntau yam rau kev siv dav dav |
Xaiv Focal Length rau koj qhov project
Rau ibusb endoscope koob yees duab module:
Dav kab noj hniav los yog yeeb nkab → luv focal ntev (2.5-3.5mm) rau dav FOV.
Yuav tsum tau zoom ntawm me me tsis xws luag → ntev focal ntev (4–6mm), tab sis koj yuav tsum tau los ze zog los yog txais ib tug nqaim saib.
Rau ibraspberry pi koob yees duab module:
Feem ntau cov qauv Pi koob yees duab muaj qhov ntev focal ntev nyob ib ncig ntawm 3.0–4.0mm. Qhov no ua haujlwm rau kev yees duab dav dav thiab pom lub tshuab yooj yim. Rau cov haujlwm tshwj xeeb (xws li, nyeem QR cov lej ntawm qhov chaw ruaj khov), koj yuav xav tau lub lens sib txawv -qee qhov Pi modules txhawb nqa M12 mounts.
Rau ibai lub koob yees duab module:
AI cov khoom tshawb pom feem ntau xav pom tag nrho qhov xwm txheej (rau cov ntsiab lus) thaum khaws cov ntsiab lus txaus los faib cov khoom. Lub focal ntev ntawm 3-6mm yog ib txwm. Kuaj nrog koj qhov kev cia siab ua haujlwm nyob deb.
Yuav ua li cas Focal Length Interacts nrog Sensor Loj
Tib lub focal ntev muab sib txawv FOV ntawm qhov sib txawv sensor ntau thiab tsawg. Lub lens 3.6 hli ntawm lub ntsuas me me (1/3 ") muab qhov pom nqaim dua li ntawm lub sensor loj (1/2"). Nco ntsoov xyuas qhov sensor loj. Ntau lub tuam txhab sau cov kab rov tav FOV ncaj qha, uas yooj yim dua los sib piv.
Tsau vs. Adjustable Focal Length
Tsau:Yooj yim, pheej yig, muaj zog. Siv feem ntauusb endoscope koob yees duab modulethiabraspberry pi koob yees duab moduletsim.
Varifocal:Koj tuaj yeem kho qhov ntev ntawm qhov focal (thiab yog li FOV). Feem ntau hauv cov koob yees duab kev ruaj ntseg.
Autofocus:Kho kom pom qhov nrug deb, tsis yog focal ntev. Qee cov modules kuj muaj zoom.
Sincere's Camera Modules
Ntawm Sincere, peb muab cov koob yees duab modules nrog ntau yam ntawm focal lengths:
- Qhov zoo tshaj plaws lub koob yees duab module:Peb pab koj xaiv qhov zoo tshaj plaws focal ntev.
- Focal ntevxaiv: Los ntawm 1.8mm (ultra-dav) mus rau 16mm (telephoto) thiab kev cai.
- Ai koob yees duab module:Lenses phim rau AI ua (piv txwv li, 3-6mm rau cov khoom tshawb pom).
- Cmos module koob yees duab:Precision-paired lo ntsiab muag rau cov duab ntse.
- Usb endoscope koob yees duab module:Lub kaum sab xis dav (2.5-3.5mm) rau kev tshuaj xyuas.
- Raspberry pi koob yees duab module:Tsau-focus thiab M12 mount modules rau DIY thiab kev siv.
Peb cov khoom tsim muaj xws li Active Alignment (AA) rau qhov zoo meej lens-sensor alignment.
Yuav ua li cas xaiv txoj cai Focal Length
- Paub koj qhov chaw ua haujlwm nrug:Lub koob yees duab nyob deb npaum li cas ntawm qhov kev kawm?
- Txhais lub hom phiaj cheeb tsam:Qhov chaw dav thiab siab npaum li cas yuav tsum muaj?
- Siv lub laij lej FOV onlinenrog koj sensor loj thiab focal ntev.
- Kuaj nrog tus qauv qauvyog tias ua tau -tsis muaj dab tsi ua qhov kev sim ntawm lub ntiaj teb tiag.
Cov ntsiab lus
Focal ntev yog qhov kev ncua deb ntawm lub lens mus rau lub sensor. Qhov ntev focal ntev (2.5-4mm) muab kev pom dav dav, zoo tagnrho rau endoscopes thiab kev ruaj ntseg. Ntev focal ntev (6-12mm) nqaim qhov pom tab sis nthuav cov khoom nyob deb, zoo rau kev ua haujlwm telephoto.
Xaiv qhov focal ntev yog qhov tseem ceeb kom tau txais qhovzoo tshaj lub koob yees duab modulerau koj qhov project. Txawm koj xav tau ibusb endoscope koob yees duab module, a raspberry pi koob yees duab module,or ibai lub koob yees duab module, nkag siab txog qhov ntev focal pab koj xaiv txoj cai.
Ntawm Sincere, peb tsimcmos module koob yees duabdaws nrog optimized focal lengths. Tiv tauj peb los tham txog koj cov kev xav tau.
