Cov mis yog: d=c√fxl d=pinhole inch - c=tas li=1.9 - f=focal nrug - l=wavelength ntawm lub teeb Lub wavelength uas yog feem ntau siv yog ib lub teeb daj=0.000550 (Rau siv nrog infrared zaj duab xis piv txwv li, ib tug yuav siv tau lwm tus nqi).
Koj suav lub koob yees duab li cas?
Tus f-tus naj npawb ntawm lub koob yees duab yuav raug xam by faib qhov deb ntawm lub pinhole mus rau lub dav hlau duab (qhov focal ntev) los ntawm txoj kab uas hla ntawm tus pinholePiv txwv li, lub koob yees duab nrog lub 0.5 hli txoj kab uas hla pinhole, thiab ib tug 50 hli focal ntev yuav muaj tus naj npawb f ntawm 50/0.5, los yog 100 (f/100 nyob rau hauv conventional notation).
Koj ntsuas tus pinhole li cas?
Siv ib millimeter nrug ntawm tus pas ntsuas, pom pom qhov dav ntawm tus pinhole rau hauv feem ntawm qhov kev ncua deb ntawm cov cimNws yog ib qho yooj yim los xav txog lub qhov yog kwv yees li 1/4, 1/3rd lossis 1/2 qhov kev ncua deb ntawm cov qhab nia. Txhua 1/4 ntawm ib millimeter yog sib npaug rau. 25 mm.
Dab tsi yuav tsum yog qhov loj ntawm tus pinhole hauv lub koob yees duab pinhole?
Yog li ntawd, nws yog ib lub tswv yim zoo los ua lub qhov tsis loj dua. 05 inches inch thiab tsis me dua. 01 inches diam. Nyob rau hauv cov kev txwv no qhov luaj li cas ntawm tus pinhole kuj yog txiav txim los ntawm lub focal ntev ntawm lub koob yees duab.
Dab tsi yog qhov tsis zoo ntawm lub koob yees duab pinhole?
- Daim duab tsim tsis qhia meej. Feem ntau, nws yog faint.
- Daim duab tau txais ntawm qhov screen thiab tsis muaj cov ntaub ntawv khaws tseg ntawm daim duab tuaj yeem tau.
- Pinhole lub koob yees duab siv tsis tau rau kev kawm cov khoom txav.
