Calcium Fluoride (CaF₂)
lenses Bi-Convex

Akụkụ abụọ nke Bi-convex ma ọ bụ Double-convex (DCX) Lenses Spherical Spherical nwere okirikiri ma nwee otu radius dị mma nke curvature, ha bụ oghere dị mma nke dị oke n'etiti karịa na nsọtụ.Mgbe ụzarị agbakọtara na-agafe n'ime ha, ọkụ na-agbakọta ruo ebe a na-ahụ anya.Bi-convex na-ewu ewu maka ọtụtụ ngwa onyonyo nwere njedebe n'ọnọdụ ebe ihe na onyonyo dị n'akụkụ nke ọzọ, emebere ha ka ha nwee ogologo ogologo f= (R1*R2)/((n-1)*(R2-R1) )).

lenses bi-convex (ma ọ bụ lenses abụọ convex) na-arụ ọrụ nke ọma mgbe ihe ahụ dị nso na oghere na ọnụ ọgụgụ conjugate dị ala.Mgbe ihe na anya ihe onyonyo hà nhata (1: 1 na-ebuwanye ibu), ọ bụghị naanị na a na-ebelata nhụsianya okirikiri, kamakwa ọgbaghara, na aberration chromatic na-akagbu n'ihi akara ngosi.Yabụ na ha bụ nhọrọ kacha mma mgbe ihe na onyonyo nọ na oke njikọ zuru oke dị nso na 1:1 yana mbanye ntinye dị iche iche.Dị ka usoro isi mkpịsị aka, lenses bi-convex na-arụ ọrụ nke ọma n'ime opekempe aberration na ọnụ ọgụgụ conjugate n'etiti 5:1 na 1:5, a na-eji ha eme ihe maka foto relay (Real Object and Image) ngwa.N'èzí oke a, lenses plano-convex na-adabakarị.

N'ihi mgbasa ya dị elu site na 0.18 µm ruo 8.0 μm, CaF2 na-egosipụta index refractive dị ala dị iche iche site na 1.35 ruo 1.51 ma na-ejikarị eme ihe maka ngwa na-achọ nnukwu nnyefe na infrared na ultraviolet spectral ranges.Calcium fluoride dịkwa mma nke ukwuu ma na-enye ike dị elu ma e jiri ya tụnyere barium fluoride ya na ndị ikwu magnesium fluoride.Paralight Optics na-enye lenses Calcium Fluoride (CaF2) Bi-Convex dị na mkpuchi brọdband AR kachasị maka 2 µm ruo 5 μm spectral nso nke edobere n'elu abụọ ahụ.Mkpuchi a na-ebelata nke ọma nleba anya nke mkpụrụ osisi na-erughị 1.25%, na-enyefe nkezi nnyefe karịa 95% karịa ihe mkpuchi AR dum.Lelee eserese ndị a maka ntụnyere aka gị.