1. Yadda za a zabi?
Lokacin da tabarau masu dacewa, lokacin da aka isa don zaɓar hanyar haɗin Lens, Gilashin Gilashin ba a yi asara ba?Ban San Yadda ake zaɓar Lens ba.Anan ga yadda ake zabar ruwan tabarau da ya dace don digiri.
2. Indexididdigar refractive
Fihirisar refractive shine rabon saurin yaduwa na haske a cikin sarari zuwa na haske a kayan ruwan tabarau.
Mafi girman ma'aunin ma'auni, mafi ƙaranci na Lens, wato, kauri ɗaya na tsakiyar Lens, adadin digiri iri ɗaya na Lens ɗin abu ɗaya, mafi girman ma'aunin refractive fiye da ƙananan kauri na Lens Edge.Mafi girman ma'aunin nuni na kayan, mafi ƙarfin ikon hana hasken abin da ya faru.
A halin yanzu, babban ma'aunin ruwan tabarau a kasuwa sune: 1.56,1.61,1.67,1.74.
Yawancin lokaci siga na farko da mutane da yawa ke hulɗa da ruwan tabarau shine ma'anar refractive.Sannan shine mafi kyawun siffa ta Lens shine: Mafi Girma Ma'anar Refractive, mafi ƙarancin ruwan tabarau.
Don kyakkyawa da buƙatun nauyi, ruwan tabarau na bakin ciki zaɓi ne mai kyau.
3.Abba number
A cikin zabar ruwan tabarau, wani maɓalli na bayanai mai alaƙa da ruwan tabarau shine lambar abbe.To menene lambar Abelian?
Lambar Ernst Abbe tana nufin abin da ake watsawa, wanda ake amfani da shi don auna kaifin hoton ruwan tabarau.Mafi girman lambar ABBE, ƙarami da tarwatsawa, mafi bayyane kuma mafi mahimmancin tasirin gani.
Idon ɗan adam yana da lambar abbe na 58.6, kuma kusancin lambar Ernst Abbe na Lens, mafi kyawun ruwan tabarau zai kasance.
4. Refractive index darajar
A, idan matakin digiri 0-200 ne, muna ba da shawarar yin amfani da ruwan tabarau 1.56 mai jujjuyawa.
B, idan digiri a cikin digiri 200-350, muna ba da shawarar yin amfani da ruwan tabarau na 1.61.
C, idan digiri a cikin digiri 350-550, muna ba da shawarar yin amfani da ruwan tabarau na 1.67 refractive index.
D, idan matakin digiri na 550-800 kuma fiye da digiri 800, muna ba da shawarar yin amfani da ruwan tabarau na 1.74 refractive.
5. Tips
Idan tazarar ɗalibin ya yi ƙanƙanta sosai, ko girman firam ɗin da aka zaɓa ya yi girma, ana ba da shawarar ƙara fihirisar refractive.
Lokacin zabar firam, yakamata mutum yayi la'akari da hulɗa tare da Lens:
Girman girman firam ɗin, mafi girman diamita na Lens, kuma mafi girman gefuna na firam.
Kada ka yi tunanin cewa zabi na wani babban refractive index Lens, sa gefen gilashin zai zama sosai bakin ciki, wannan kuskure ne, saboda wannan adadin ruwan tabarau sanya saboda kauri daga cikin dalibi nesa, astigmatism, axis, frame size. kuma daban-daban.
Sabili da haka, lokacin da muka zaɓi ruwan tabarau da ya dace da digirinmu, ya kamata mu yi la'akari da dukkan bangarori, don gilashin ya fi dacewa da sawa.
Lokacin aikawa: Yuli-28-2021