Kalsium Fluoride (CaF2)
Nā Lens Plano-Concave

ʻO nā lens plano-concave nā lens maikaʻi ʻole i ʻoi aku ka mānoanoa ma ka ʻaoʻao ma mua o ka waena, ke hele ka mālamalama ma o lākou, ʻokoʻa ia a ʻo ke kiko kikoʻī he virtual.ʻAʻole maikaʻi ko lākou mau kikoʻī, a me ka radius o ka curvature o nā ʻaoʻao curved.Hāʻawi ʻia i kā lākou aberration spherical maikaʻi ʻole, hiki ke hoʻohana ʻia nā lens plano-concave e kaulike i nā aberrations spherical i hana ʻia e nā lens ʻē aʻe i loko o kahi ʻōnaehana optical.Pono nā lens plano-concave no ka hoʻokaʻawale ʻana i ke kukui i hui ʻia a me ka hoʻohui ʻana i kahi kukuna convergent, hoʻohana ʻia lākou e hoʻonui i nā kukuna māmā a hoʻonui i ka lōʻihi o ke kiko i nā ʻōnaehana optical e kū nei.Hoʻohana pinepine ʻia kēia mau lens maikaʻi ʻole i nā telescopes, nā kamera, nā lasers a i ʻole nā aniani e kōkua i nā ʻōnaehana hoʻonui e ʻoi aku ka paʻakikī.

Hana maikaʻi nā lens plano-concave ke loaʻa ka mea a me ke kiʻi i nā ratio conjugate piha, ʻoi aku ka nui ma mua o 5:1 a i ʻole ka liʻiliʻi ma mua o 1:5.I kēia hihia, hiki ke hōʻemi i ka aberration spherical, coma, a me ka distortion.E like me nā lens plano-convex, no ka hoʻokō ʻana i ka pono kiʻekiʻe o ka ʻili curved e kū pono i ka mamao mea nui a i ʻole ka conjugate pau ʻole e hōʻemi i ka spherical aberration (koe wale nō ke hoʻohana ʻia me nā lasers ikaika nui kahi e hoʻohuli ʻia ai kēia e hoʻopau i ka hiki o kahi virtual. nānā).

Ma muli o kona hoʻouna kiʻekiʻe mai 0.18 µm a i 8.0 μm, hōʻike ʻo CaF2 i kahi kuhikuhi refractive haʻahaʻa e ʻokoʻa ana mai 1.35 a i 1.51 a hoʻohana maʻamau ʻia no nā noi e koi ana i ka hoʻouna kiʻekiʻe i ka infrared a me ka ultraviolet spectral ranges, he index refractive o 1.428 ma 1.064. .ʻAʻole inert kemika ka calcium fluoride a hāʻawi i ka ʻoi aku ka paʻakikī i hoʻohālikelike ʻia me kāna barium fluoride, a me nā hoahānau fluoride magnesium.Hāʻawi ʻo Paralight Optics i nā lens plano-concave Calcium Fluoride (CaF2) me nā uhi antireflection no ka 2 µm a i 5 µm ka lōʻihi hawewe i waiho ʻia ma nā ʻaoʻao ʻelua.Hoʻemi nui kēia uhi ʻana i ka noʻonoʻo ʻana o ka ʻili o ka substrate, e hāʻawi i ka hoʻoili awelika i ʻoi aku ma mua o 97% ma luna o ka laulā uhi AR āpau.E nānā i nā kiʻi ma lalo no kāu mau kuhikuhi.