ʻO ka wehe ʻana i nā mea no nā lens o nā aniani

Hoʻopili ʻia ka mānoanoa o ka lens i nā aniani e nā kumu he nui, ʻo ia ka mana o ka lens ke kumu nui.ʻOi aku ka mānoanoa o nā Lens o High Myopia ma mua o ka Myopia haʻahaʻa.Eia naʻe, i ka wā e pili ana i ka mānoanoa holoʻokoʻa, he mea nui hoʻi ke anawaena o ka Lens, a ʻo ke koho ʻana i kahi kiʻi liʻiliʻi hiki ke hoʻemi nui i ka mānoanoa o ka Lens.He mea koʻikoʻi ke ʻano o ka Lens, e like me Myopia ma ka ʻāpana ʻaoʻao mānoanoa o ka Lens concave, Hyperopia ma ka ʻaoʻao waena mānoanoa o ka Convex Lens a me ka ʻāpana lahilahi.

He ʻano koʻikoʻi ka helu helu refractive (Iune 20) o kahi lens a he kumu e hiki ai i ka mea maʻi ke hoʻomalu i ka mānoanoa o ka Lens.ʻO ka helu helu refractive ka lakio o ka māmā e hele ai ke kukui ma waena o kekahi ʻano (e like me ke aniani, ka wai, ka plastik, ka ea) i kona helu i loko o kahi ʻūhā.ʻOi aku ka kiʻekiʻe o ka ʻōlelo kuhikuhi refractive, ʻoi aku ka haʻahaʻa o ka hoʻouna ʻana o ka māmā ma ke kikowaena, a ʻoi aku ka maopopo o ka refraction o ka mālamalama.No laila, ʻoi aku ka maikaʻi o ka lens me kahi kuhikuhi refractive kiʻekiʻe i ka mālamalama a no laila ʻoi aku ka lahilahi ma mua o ka lens me kahi kuhikuhi refractive haʻahaʻa.

Ua hana ʻia nā aniani i ke aniani no nā kenekulia, a ke hoʻomau nei kekahi poʻe maʻi i nā aniani aniani no ka mea ua manaʻo lākou e hāʻawi iā lākou i ka ʻike maikaʻi loa.Hana ʻia nā aniani aniani o kēia wā mai ka Crown Glass, kahi mea me ka haʻahaʻa chromatic aberration a me ke kūpaʻa ʻana i ka ʻōpala.He kiʻekiʻe ko ka Crown Glass, ʻoi aku ka kiʻekiʻe ma mua o nā lens plastik he nui.Eia nō naʻe, ma muli o kona kiʻekiʻe kiʻekiʻe, ʻoi aku ke kaumaha o ke aniani lei aliʻi ma mua o nā lens plastik me ka index refractive like, ʻoiai ʻoi aku ka mānoanoa o nā lens plastik.Hiki i nā maʻi ke koho i nā lens māmā, ʻo ia ke kumu e koho ai lākou i nā lens plastik ma luna o ke aniani lei aliʻi.

ʻO Columbia Resin-39(CR-39) ka Plastic maʻamau no nā aniani aniani.He mea lens maikaʻi kēia, pale ʻole, a he hapalua wale nō ke kaumaha o ka lens aniani like.Eia nō naʻe, ʻo kona ʻano kuhikuhi haʻahaʻa refractive ʻo ia ka mānoanoa o ka Lens ke hana ʻia i nā aniani kiʻekiʻe-diopter.

Ua hoʻomohala ʻia nā ʻano mea lens plastic like ʻole, ka hopena i kahi kuhikuhi refractive kiʻekiʻe akā ʻoi aku ka lahilahi a me ka māmā.E like me ka polycarbonate (1.586), polyurethane (1.595) a me ke aniani mea kūikawā (1.70).ʻAʻole ʻoi aku ka mānoanoa o kēia mau lens ma mua o nā mea maʻi myopic ʻē aʻe, ʻoiai e hāʻawi ana i kahi helu kiʻekiʻe o nā degere o ke kiʻekiʻe.Eia nō naʻe, ʻoi aku ka nui o nā aberrations o kekahi o kēia mau mea ma mua o nā mea kuhikuhi haʻahaʻa refractive index a ʻaʻole hiki ke ʻae ʻia.ʻOi aku ka palupalu o ka hapa nui o kēia mau mea, ʻoi aku ke kūpaʻa i ka haki ʻana ma mua o ke aniani a i ʻole ka plastik CR-39, akā ʻoi aku ka maʻalahi o ka ʻohi.