Aspherical lens

Amaphuzu zabhekana ngcono eziningi nezinguquko phakathi neminyaka, isize ekuxazululeni izinkinga nge umbono. Namuhla kukhona ezihlukahlukene ukukhetha amaphuzu abanamalensi ezahlukene. Ethandwa kakhulu - lens aspherical.

Early izama ukwenza lens yalolu hlobo zenziwa René Descartes kule 1620s kanye Constantine Huygens ngo-1630. ukuma-Sectional, Descartes ithuthukiswe le njongo is njengokusho kwesigaba Cartesian ezaziwayo.

Smethwick Francis wadala ngowokuqala eliphezulu aspherical izakhi lens, futhi baziyisa iRoyal Society Februwari 27, 1667. Kwakuwusuku isibonakude, kuhlanganise lens ezintathu aspherical.

Ukuthuthukiswa lens lokuqala aspherical izibuko udumo Moritz von Roru. ekukhiqizweni kanye nokusetshenziswa lens kwaqala ngo 50s last sibonga ekhulwini ukukhululwa isiqophi amakhamera lens aspheric zithandwa kakhulu ngenxa eliphezulu of ukuqopha.

lens Ezivamile abe lwalugobile ingilazi ebusweni. Aspherical lens, ngakolunye uhlangothi, zenziwa nge yabalingisi ingilazi ekhethekile, futhi nakuba kusadingeka surface lwalugobile, akusiyo eyindilinga ngokuphelele.

Lo mehluko wenza isesimweni kubenza esinembile ne aberrations okumbalwa ezibukwayo kuka lens eyindilinga. Aspherical lens, ikakhulukazi esetshenziswa izibuko, kodwa eyenziwa kule minyaka engu-30 edlule ukukhiqiza izithombe eliphezulu futhi njengendinganiso yazo amakhamera amancane camcorders.

Ngenxa yobukhulu ezincane kanye abakhiqizi phakathi ohlabayo kuba lula ukulungisa ukuma lens ukudala, okwenza kube kungenzeka ulungise amandla optical lens ngamunye futhi icacile.

Aspheric lens engabizi futhi ezincane kuno lens ezivamile, nekhwalithi ngokuvamile idlule labo abenziwe simise eyindilinga.

Phakathi lolu hlobo lens nge lens aspherical secrete ebusweni phambi noma emuva (ngaphandle yesibili eyindilinga), kanye aspheres double lapho "flat", futhi yangaphandle kanye ebusweni yangaphakathi.

Aspherical lens for izibuko uma iqhathaniswa eyindilinga ifa eziningi eziwusizo:

- lecacile kubuye kube ebanzi emkhakheni buka sibonga a mncane lens ijika evumela abanikazi ukubona ngokucacile futhi ngokugqamile, ngifuna kusuka kunoma iyiphi ingxenye ye-lens.

- ukuhlanekezela sakugcina kanye azungeze (wayephazamisekile);

- bezibona lemvelo lezinto futhi ubukhulu isikhala (lens "okokuqandisa" akusenzi, "plus" ayikhuphuki);

- encishisiwe isisindo ngokunciphisa ukujiya, esinikela umbono ukulungiswa ngaphandle nzima obukhulu kakhulu lens eyindilinga;

- encishisiwe ukujiya: elisendaweni lens omuhle izacile futhi izacile emaphethelweni sub-zero;

- akukho usayizi ukuhlanekezela iso (ngokuvamile kwenzeka uma ubuka umuntu kusukela izibuko).

Nge ukuthuthukiswa ngokushesha ubuchwepheshe, contact lens aspheric yathi chithi saka kuyo yonke le minyaka embalwa edlule. Zingenziwa elinama esiqinile noma nezimo, ungakwazi ukushintsha umbala nokubukeka ehlweni lomuntu ukulungisa ezihlukahlukene umbono iziyaluyalu. Omunye zalezi zinkinga kuyinto astigmatism, okuyinto evame ukulungiswa ngokusebenzisa lens aspherical.

Kodwa zincane futhi ohlabayo kuka lens obuvamile, lokhu kuchaza ngokwengxenye kungani bebizwa "premium" futhi kungani amanani aphezulu.

Aspheric lens izacile, futhi lokhu kusho ukuthi basuke kangcono bazivumelanisa ubunjalo iso umnikazi ijika ngamunye futhi ngeke iphazamise kancane ne Siyafulesha.

I yokuntula yalolu hlobo lens izindleko zabo eziphakeme ezazihlobene senqubo yokukhiqiza more xaka. Ngaphezu kwalokho, ukushuba ezincane lens aspherical kusho ukuthi zitholakala eduze ebusweni, okuyinto ngezinye izikhathi kudala reflectance ebonakalayo kusuka zombili, ezingasetshenziswa kuphela bungaveli ngokusebenzisa enamathela anti-lembhali.