Lapho ukulungiswa kwamehlo omuntu kuba buthaka ngenxa yobudala, udinga ukulungisa umbono wakhe ngokwehlukana ukuze abone kude naseduze.Ngalesi sikhathi, ngokuvamile udinga ukugqoka amapheya amabili ezingilazi ngokwehlukana, okuyinto engathandeki kakhulu.Ngakho-ke, kuyadingeka ukuthi ugaye amandla amabili ahlukene okuphinda aqhamuke kwilensi efanayo ukuze abe amalensi ezindaweni ezimbili.Amalensi anjalo abizwa ngokuthi ama-bifocal lens noma izibuko ze-bifocal.
Uhlobo
Uhlobo lokuhlukanisa
Iwuhlobo lokuqala nolulula kakhulu lwamalensi ebhinobholo.Umsunguli wayo ngokuvamile waziwa njengosaziwayo waseMelika uFranklin.Amalensi amabili amadigri ahlukene asetshenziselwa isibuko se-bifocal sohlobo lokuhlukanisa, esisetshenziswa njengezindawo ezikude neziseduze zokubeka indawo emaphakathi.Lesi simiso esiyisisekelo sisasetshenziswa kuyo yonke imiklamo yezibuko ezimbili.
Uhlobo lwe-Gluing
Namathisela ifilimu engaphansi kwifilimu enkulu.I-gum yasekuqaleni kwakuyi-canadian cedar gum, okulula ukuyinamathisela, futhi ingaphinde inamathelwe ngemuva kokuthi irabha yonakaliswe yimiphumela yemishini, eshisayo neyamakhemikhali.Uhlobo lwe-epoxy resin olusebenza kangcono ngemva kokwelashwa kwe-ultraviolet kancane kancane seluthathe indawo yokuqala.Isibuko se-bifocal esinamathiselwe senza ifomu ledizayini nosayizi we-sublayer ehluke kakhulu, okuhlanganisa isendlalelo esingaphansi esidayiwe kanye nedizayini yokulawula iprism.Ukuze wenze umngcele ungabonakali futhi kunzima ukutholwa, ucezu oluncane lungenziwa umbuthano, kanye nesikhungo se-optical kanye nesikhungo sejometri ngokuqondana.I-waffle type bifocal mirror iyisibuko esikhethekile esinamathelwe nge-bifocal.Unqenqema lungenziwa lube mncane kakhulu futhi lube nzima ukuhlukanisa lapho ucezu oluncane lucutshungulwa emzimbeni othwala isikhashana, ngaleyo ndlela kuthuthukisa ukubukeka.
Uhlobo lwe-Fusion
Iwukuhlanganisa impahla yelensi enenkomba ephezulu yokuphinda ikhanye endaweni ye-concave epuletini eliyinhloko ekushiseni okuphezulu, futhi inkomba ye-refractive yepuleti elikhulu iphansi.Bese ugijima ebusweni besiqephu esincane ukuze wenze ukugoba kwendawo engaphansi kwesiqephu kuhambisane nalokho kwesiqephu esikhulu.Awukho umqondo wokuklanywa.Ukufunda okwengeziwe u-A kuncike emandleni e-refractive F1 obuso obungaphambili benkundla ekude yombono, i-FC curvature ye-arc yokuqala ye-concave kanye nesilinganiso sokuhlanganisa.Isilinganiso sokuhlanganisa siwubudlelwano bokusebenza phakathi kwenkomba yokuphinda yenzeke yezingxenye ezimbili zelensi ehlanganisayo, lapho u-n emelela inkomba ye-refractive yengilazi eyinhloko (ngokuvamile ingilazi yomqhele) futhi u-ns umele inkomba ye-refractive ye-sub-sheet (ingilazi ye-flint) ene inani elikhulu, bese kuba isilinganiso sokuhlanganisa k=(n-1) / (nn), ngakho A=(F1-FC) / k.Kungabonakala kufomula engenhla ukuthi ngombono, ukushintsha i-front surface curvature yepuleti elikhulu, i-concave arc curvature kanye ne-sub-plate refractive index ingashintsha idigri eyengeziwe eyengeziwe, kodwa empeleni, ngokuvamile ifinyelelwa ngokushintsha. i-sub-plate refractive index.Ithebula 8-2 libonisa inkomba ye-refractive yengilazi ye-flint yeshidi elincane elivame ukusetshenziswa emhlabeni ukuze kwenziwe izibuko ze-bifocal ezihlanganisa eduze ezengeziwe.
Ithebula 8-2 Inkomba ye-Refractive yamapuleti amancane ezibuko ze-bifocal ezihlanganisa eduze-engeziwe (ingilazi ye-flint)
Isilinganiso sokuhlanganisa senkomba ye-refractive ye-degree eyengeziwe ye-sub-plate
+0.50~1.251.5888.0
+1.50~2.751.6544.0
+3.00~+4.001.7003.0
Ngokusebenzisa indlela yokuhlanganisa, ama-sub-chips anomumo okhethekile angenziwa, njengama-sub-chips ayisicaba, ama-arc sub-chips, ama-rainbow sub-chips, njll. Uma sisebenzisa inkomba yesithathu ye-refractive, singenza isibuko esixubene semigoqo emithathu. .
Ama-binoculars e-resin angama-binoculars abalulekile akhiqizwa ngendlela yokuphonsa.Izibuko ze-Fusion bifocal zenziwe ngezinto zengilazi.Isibuko sengilazi esibalulekile se-bifocal sidinga ubuchwepheshe obuphezulu bokugaya.
Thayipha umugqa owodwa ngokukhanya okuphindwe kabili
Lolu hlobo lwesibuko esinokukhanya okukabili sinendawo enkulu eseduze.Kuwuhlobo lwesibuko esingesona isithombe esigxuma kabili esikhanyayo, esingenziwa ngengilazi noma ngenhlaka.Eqinisweni, isibuko se-bifocal sohlobo lwe-E singabhekwa njengedigri engalungile yokubona kude okwengeziwe esibukweni esiseduze.Ugqinsi lonqenqema olungaphezulu lwengxenye yelensi likhulu uma kuqhathaniswa, ngakho ukujiya konqenqema olungaphezulu nangaphansi lwelensi lungafana ngendlela yokunciphisa iprism.Usayizi we-prism eqondile esetshenzisiwe uncike ekuhlanganisweni okuseduze, okungu-yA/40, lapho u-y eyibanga ukusuka emugqeni ohlukanisayo ukuya phezulu eshidini, futhi u-A uwukungezwa kokufunda.Njengoba ukunamathiselwe eduze kwamehlo amabili kuvame ukulingana, inani elincane le-binocular prism nalo liyafana.Ngemuva kokuthi i-prism incishisiwe, ifilimu ye-refractive izongezwa noma ikhishwe ukuze kuqedwe ukuphikiswa kwangaphakathi.
Isikhathi sokuthumela: Mar-09-2023