Qhov nrug ntawm yam khoom me dua qhov ntev ntawm lub iav convex (s < f)
Raws li kev xam suav ntawm daim iav convex duab Nws tuaj yeem xaus lus tias yog tias qhov deb ntawm yam khoom (s) me dua qhov deb ntawm lub hauv paus (f), ces cov yam ntxwv ntawm daim iav convex yog:
- Maya txhais tau hais tias lub teeb ci tsis hla dhau qhov ntxoov ntxoo vim tias qhov ntxoov ntxoo nyob tom qab daim iav convex.
- Sawv ntsug los yog tsis upside down
- Qhov deb ntawm ib yam khoom ntawm daim iav convex, qhov loj ntawm daim duab yuav me dua.
- Qhov deb ntawm daim iav convex, qhov deb ntawm daim duab ntawm daim iav convex.
Qhov nrug ntawm cov khoom yog tib yam li qhov ntev ntawm lub iav convex (s = f)
Raws li kev xam suav ntawm daim iav convex duab Nws tuaj yeem xaus lus tias yog qhov deb ntawm cov khoom yog tib yam li qhov ntev ntawm daim iav, ces cov khoom ntawm daim duab yog:
- Maya txhais tau hais tias lub teeb ci tsis hla dhau qhov ntxoov ntxoo vim tias qhov ntxoov ntxoo nyob tom qab nws. daim iav convex
- Ntsug
- Txo qhov loj (qhov loj ntawm daim duab ntxoov ntxoo yog ½ qhov loj ntawm yam khoom)
– Qhov deb ntawm daim duab me dua qhov deb ntawm yam khoom (qhov deb ntawm daim duab yog ½ npaug ntawm qhov deb ntawm yam khoom)
Qhov nrug ntawm yam khoom loj dua qhov ntev ntawm lub lens thiab me dua qhov radius ntawm curvature ntawm daim iav convex (f < s < R)
Raws li kev xam suav ntawm daim iav convex duab Nws tuaj yeem xaus lus tias yog tias cov khoom nyob nruab nrab ntawm qhov chaw tsom mus rau qhov chaw thiab lub vojvoog ntawm qhov nkhaus ntawm daim iav, cov khoom ntawm daim duab yog:
- Maya txhais tau hais tias lub teeb ci tsis hla dhau qhov ntxoov ntxoo vim tias qhov ntxoov ntxoo nyob tom qab daim iav convex.
- Sawv ntsug los yog tsis upside down
- Txo qhov txhais tau tias qhov loj ntawm tus duab ntxoov ntxoo me dua qhov loj ntawm yam khoom
- Qhov deb ntawm daim iav convex, qhov deb ntawm daim duab ntawm daim iav convex.
Qhov nrug ntawm cov khoom yog sib npaug rau lub vojvoog ntawm qhov nkhaus ntawm daim iav convex (s = R)
Raws li kev xam suav ntawm daim iav convex duab Nws tuaj yeem xaus lus tias yog qhov deb ntawm qhov khoom yog tib yam li lub vojvoog ntawm curvature ntawm daim iav, cov khoom ntawm daim duab yog:
- Maya txhais tau hais tias lub teeb ci tsis hla dhau qhov ntxoov ntxoo vim tias qhov ntxoov ntxoo nyob tom qab daim iav convex.
- Ntsug
- Txo qis (qhov loj ntawm duab ntxoov ntxoo yog 1/3 ntawm qhov loj ntawm yam khoom)
- Qhov deb ntawm daim duab me dua qhov deb ntawm cov khoom (qhov deb ntawm daim duab yog 1/3 npaug ntawm qhov deb ntawm cov khoom)
Qhov nrug ntawm yam khoom loj dua li lub vojvoog ntawm qhov nkhaus ntawm daim iav convex (s > R)
Raws li kev xam suav ntawm daim iav convex duab Nws tuaj yeem xaus lus tias yog tias qhov deb ntawm qhov khoom loj dua lub vojvoog ntawm curvature ntawm daim iav, cov khoom ntawm daim duab yog:
- Maya txhais tau hais tias lub teeb ci tsis hla dhau qhov ntxoov ntxoo vim tias qhov ntxoov ntxoo nyob tom qab daim iav convex.
- Ntsug
- Txo qhov txhais tau tias qhov loj ntawm tus duab ntxoov ntxoo me dua qhov loj ntawm yam khoom
- Qhov deb ntawm daim duab me dua qhov deb ntawm cov khoom (daim duab nyob ze rau daim iav, cov khoom nyob deb ntawm daim iav)
