Pamene kusintha kwa diso la munthu kumafooka chifukwa cha ukalamba, ayenera kuwongolera masomphenya ake padera kwa masomphenya akutali ndi apafupi. Panthawiyi, nthawi zambiri amafunika kuvala magalasi awiri padera, zomwe zimakhala zovuta kwambiri. Choncho, m'pofunika pogaya awiri osiyana mphamvu refractive pa mandala amodzi kukhala magalasi mbali ziwiri. Magalasi oterowo amatchedwa magalasi a bifocal kapena magalasi a bifocal.
Mtundu
Gawani mtundu
Ndiwo mtundu wakale kwambiri komanso wosavuta wa lens ya binocular. Woyambitsa wake amadziwika kuti ndi wotchuka waku America Franklin. Magalasi awiri a madigiri osiyanasiyana amagwiritsidwa ntchito pagalasi lopatukana la bifocal, lomwe limagwiritsidwa ntchito ngati madera akutali ndi pafupi ndi malo apakati. Mfundo yofunika imeneyi ikugwiritsidwabe ntchito popanga magalasi apawiri.
Mtundu wa gluing
Ikani filimuyo pafilimu yaikulu. Chingamu choyambirira chinali chingamu cha mkungudza cha ku Canada, chomwe ndi chosavuta kumamatira, ndipo chimathanso kumamatidwa pambuyo poti mphira wawonongeka ndi makina, kutentha ndi zotsatira za mankhwala. Mtundu wa utomoni wa epoxy womwe umagwira bwino ntchito pambuyo pa chithandizo cha ultraviolet walowa m'malo mwa woyamba. Kalilore wopangidwa ndi glued amapangitsa kapangidwe kake ndi kukula kwa sublayer kukhala kosiyanasiyana, kuphatikiza utoto wopaka utoto komanso kapangidwe ka prism control. Pofuna kuti malirewo asawonekere komanso ovuta kudziwika, kagawo kakang'ono kangapangidwe kukhala bwalo, ndi optical center ndi geometric center coincident. Waffle type bifocal galasi ndi galasi lapadera lomatira. Mphepete mwake imatha kukhala yopyapyala kwambiri komanso yovuta kusiyanitsa pamene gawo laling'ono limakonzedwa pathupi losakhalitsa, motero kuwongolera mawonekedwe.
Mtundu wa Fusion
Ndiko kuphatikizira zinthu za lens ndi index yotsika kwambiri ya refractive m'dera la concave pa mbale yayikulu pa kutentha kwakukulu, ndipo index yowonetsera ya mbale yayikulu ndiyotsika. Kenaka thamangani pamwamba pa chidutswacho kuti mupange kupindika kwa gawo laling'ono kuti likhale logwirizana ndi gawo lalikulu. Palibe lingaliro lakuyika malire. Kuwerenga zowonjezera A kumadalira mphamvu yowonetsera F1 ya kutsogolo kwa masomphenya akutali, kupindika kwa FC ya arc yoyambirira ya concave ndi chiŵerengero cha maphatikizidwe. Chiŵerengero cha fusion ndi mgwirizano wogwira ntchito pakati pa refractive index of two phase fusion lens lens, pomwe n imayimira refractive index of the main glass (nthawi zambiri galasi la korona) ndipo ns imayimira refractive index ya sub-sheet (galasi lamwala) ndi mtengo waukulu, ndiye chiŵerengero cha maphatikizidwe k=(n-1) / (nn), kotero A=(F1-FC)/k. Zitha kuwonedwa kuchokera ku ndondomeko yomwe ili pamwambayi kuti, mwachidziwitso, kusintha kokhota kwa kutsogolo kwa mbale yayikulu, kupindika kwa concave arc ndi sub-plate refractive index kungasinthe digiri yowonjezera yowonjezera, koma kwenikweni, imapezeka mwa kusintha. sub-plate refractive index. Tebulo 8-2 likuwonetsa magalasi amiyala omwe amagwiritsidwa ntchito kwambiri padziko lonse lapansi kupanga magalasi ophatikizika apafupipafupi ophatikizika a bifocal.
Table 8-2 Refractive index of sub-plates ya magalasi apafupi ophatikizika a bifocal (galasi la mwala)
Chiŵerengero cha refractive index fusion cha dipuloma yowonjezera yowonjezera
+ 0.50 ~ 1.251.5888.0
+1.50~2.751.6544.0
+3.00~+4.001.7003.0
Pogwiritsa ntchito njira yophatikizira, timagulu tating'ono tating'ono tating'ono tingapangidwe, monga tchipisi tating'onoting'ono tating'onoting'ono, ma arc sub-chips, utawaleza, ndi zina zambiri. .
Mabinoculars a resin ndi mabinoculars ofunikira opangidwa ndi njira yoponyera. Magalasi a Fusion bifocal amapangidwa ndi zida zamagalasi. Magalasi ophatikizana ndi bifocal galasi amafunikira ukadaulo wapamwamba wakupera.
E-Type mzere umodzi kuwala kawiri
Kalilore wamtundu wapawiri wamtunduwu ali ndi malo oyandikira kwambiri. Ndi mtundu wa galasi lopanda chithunzi lomwe limatha kupangidwa ndi galasi kapena utomoni. M'malo mwake, galasi la E-type bifocal limatha kuonedwa ngati gawo loyipa la mawonekedwe owonjezera pagalasi loyandikira. Makulidwe a m'mphepete mwa theka lapamwamba la lens ndi lalikulu kwambiri, kotero makulidwe a m'mphepete mwapamwamba ndi m'munsi mwa mandala amatha kukhala ofanana kudzera mu njira yochepetsera prism. Kukula kwa prism yowongoka yomwe imagwiritsidwa ntchito kumadalira kuwonjezereka kwapafupi, komwe ndi yA / 40, kumene y ndi mtunda kuchokera pamzere wogawanika kupita pamwamba pa pepala, ndipo A ndi kuwonjezera kuwerenga. Popeza kulumikizidwa pafupi kwa maso awiriwo nthawi zambiri kumakhala kofanana, kuchuluka kwapang'onopang'ono kwa prism ya binocular kumakhalanso komweko. Pambuyo prism ndi thinned, refractive filimu adzawonjezedwa kapena kuchotsedwa kuchotsa refraction mkati.
Nthawi yotumiza: Mar-09-2023