Yini Okufanele Uyicabangele Lapho Ukhetha Amalensi Ezimboni?

1.Izikhonkwane zelensi zezimboni

Kunezinhlobo ezintathu eziyinhlokoilensiIzinhlobo zokufaka: Ukukhweza kwe-F, ukukhweza kwe-C, kanye nokukhweza kwe-CS. Ukukhweza kwe-F kuyikhweza elibanzi, ngokuvamile lifanelekela amalensi anobude obuqondile obungaphezu kuka-25mm; kuyilapho lapho ubude obuqondile belensi eliqondile bungaphansi kuka-25mm, ngenxa yobukhulu obuncane belensi eliqondile, kusetshenziswa ikhweza le-C noma ikhweza le-CS, kanti abanye basebenzisa nekhweza le-M12.

Umehluko phakathi kwe-Cukukhwezakanye ne-CSukukhweza:

Umehluko phakathi kwe-C-mount kanye ne-CS-mount interfaces usebangeni elivela endaweni yokuxhumana yelensi nekhamera kuya endaweni eqondile yelensi (indawo lapho kutholakala khona inzwa yesithombe se-CCD yekhamera): leli banga lingu-17.53 mm le-C-mount kanye no-12.5 mm le-CS-mount.

Amalensi e-C-mount ahambisana namakhamera e-C-mount, kanti amalensi e-CS-mount ahambisana namakhamera e-CS-mount. Ilensi ye-C-mount ingasetshenziswa nekhamera ye-CS-mount ngokungeza indandatho ye-adaptha engu-5mm C/CS. Kodwa-ke, ilensi ye-CS-mount ayikwazi ukusetshenziswa nekhamera ye-C-mount.

Izikhonkwane zelensi zezimboni

2.Amapharamitha ayisisekelo amalensi ezimboni

1)Insimu Yokubuka (i-FOV): Kubhekisela endaweni ebonakalayo yento ebonwayo—ikakhulukazi, ingxenye yento egcwalisa inzwa yesithombe sekhamera. (Insimu yokubuka iyisici esibalulekile okufanele usicabangele lapho ukhetha imodeli.)

Umdwebo wensimu yokubuka

2)Ibanga Lokusebenza (WD): Kubhekisela ebangeni elivela ngaphambili kwe-ilensientweni ehlolwayo—ikakhulukazi, ibanga eliya endaweni lapho kwakheka khona isithombe esicacile. (Izici ezibalulekile okufanele zicatshangelwe ngesikhathi sokukhetha zifaka phakathi ukuthi ibanga lokusebenza lingalungiseka yini nokuthi ngabe kukhona isikhala esanele sokufaka.)

3)Isixazululo: Usayizi wesici esincane kakhulu esingaxazululeka entweni ehlolwayo esingatholwa uhlelo lokuthwebula izithombe. Ezimweni eziningi, uma insimu yokubuka incane, kulapho isixazululo siba ngcono khona.

4)Ukujula Kwensimu (DOF): Ikhono lelensi lokugcina isixazululo esidingekayo lapho into ibekwe eduze noma kude nendawo eqondile. (Kuyadingeka ukunquma ukuthi ikhasimende linezidingo ezithile yini maqondana nokujula kwensimu.)

Ukujula komdwebo wensimu

3.Ezinye izilinganiso zamalensi ezimboni

1)Usayizi wesenzi yesithombe: Usayizi wendawo esebenzayo yesensa yesithombe sekhamera, ngokuvamile ibhekisela kubukhulu obuvundlile. Le pharamitha ibalulekile ekunqumeni ukukhuliswa kwelensi okufanele ukuze kufezwe insimu yokubuka oyifunayo. Ukukhuliswa okuyinhloko kwelensi (PMAG) kuchazwa yisilinganiso sosayizi wesensa yesithombe nensimu yokubuka. Nakuba usayizi wesensa yesithombe nensimu yokubuka kuyimingcele eyisisekelo, i-PMAG ngokwayo ayihlukaniswa njengenye.

Umdwebo weskimu we-chip ezwela ukukhanya

2)Ubude be-focal (f): Isilinganiso sokuhlangana noma ukwehluka kokukhanya ohlelweni lwe-optical, oluchazwa njengebanga ukusuka enkabeni ye-optical ye-ilensiendaweni yokugxila lapho ukukhanya kuhlangana khona. Ekhamera, kubhekisela ebangeni elisuka enkabeni yelensi kuya endizeni yokuthwebula izithombe (njengefilimu noma inzwa ye-CCD). (Ifomula okufanele uyikhumbule): f = {Ibanga Lokusebenza / Uhlangothi Olude (noma Uhlangothi Olufushane) Lwensimu Yokubuka} × Uhlangothi Olude (noma Uhlangothi Olufushane) lwe-CCD.

Imiphumela yobude obuqondile ilandelayo: Uma ubude obuqondile bufushane, kulapho ukujula kwensimu kukhulu; uma ubude obuqondile bufushane, kulapho ukuphambuka kukhulu; futhi uma ubude obuqondile bufushane, kulapho ukufiphala kukhulu khona, okuholela ekunciphiseni ukukhanya emaphethelweni esithombe.

3)Isixazululo: Kubonisa ukuhlukaniswa okuncane phakathi kwamaphuzu amabili abonakala ngesethi yamalensi aqondile.

0.61 × Ubude beWaveleng (λ) / NA = Ukulungiswa (μ)

Indlela yokubala engenhla inganquma ngokwethiyori isixazululo, kodwa ayibangeli ukuhlanekezelwa.

※ Ubude begagasi obusetshenzisiwe: 550nm

4)Amandla Okuxazulula: Inani lamapheya omugqa omnyama nomhlophe abonakala ngaphakathi kwe-1 mm span; iyunithi: (lp)/mm.

I-MTF (Umsebenzi Wokudlulisa Ukuguqulwa)

Umdwebo we-MTF

5)Ukuhlanekezela: Enye yezindlela zokulinganisa ezisetshenziswa ukuhlolailensiukusebenza. Kubhekisela ephutheni lokuthwebula izithombe ohlelweni lwe-optical lapho imigqa eqondile elele endizeni yesihloko—kodwa engadluli ku-axis ye-optical—ibekwa njengemigqa egobile esithombeni esiphumayo. Ukuphazamiseka kokuhlanekezela kuthinta kuphela i-geometry yesithombe, hhayi ubukhali baso.

6)Imbobo kanye nenombolo ye-F: Imbobo iyindlela—ngokuvamile etholakala ngaphakathi kwelensi—elawula inani lokukhanya okungena kulensi. Usayizi wembobo uvezwa kusetshenziswa izinombolo ze-F, njenge-F1.4, F2.0, kanye ne-F2.8.

Umdwebo wenani lembobo

7)Ukukhuliswa kokukhanya: Ifomula esetshenziswa ukubala ukukhuliswa okuyinhloko yilena elandelayo: I-PMAG = Usayizi wesenzi yesithombe (mm) / Insimu yokubuka (mm).

8)Ukukhuliswa Kwesiboniso: Ukukhulisa isibonisi kusetshenziswa kabanzi kuma-microscopy. Ukukhulisa isibonisi sento ebukwayo kuncike ezintweni ezintathu: ukukhulisa okubonakalayo kwe-ilensi, usayizi wesenzi yesithombe sekhamera yezimboni (ifomethi yesenzi), kanye nosayizi wesenzi yokubonisa.

Ukukhulisa Isibonisi = Ukukhulisa Okubonakalayo Kwelensi × Usayizi Wesibuko × 25.4 / Usayizi Ovundlile Wenzwa

4.Izigaba eziyinhloko zamalensi ezimboni

Indlela yokuhlela:

1) Kuhlukaniswe ngobude obuqondile: ubude obuqondile obuqondile kanye nobude obuqondile bokusondeza;

2) Ihlukaniswe ngembobo: imbobo engaguquki kanye nembobo eguquguqukayo;

3) Kuhlukaniswe ngokufaka: ukukhweza okungu-C, ukukhweza okungu-CS, ukukhweza okungu-F, njll.;

4) Kuhlukaniswe ngokukhuliswa: amalensi okukhulisa angaguquki kanye namalensi okusondeza okuqhubekayo;

Amalensi ayisihluthulelo avame ukusetshenziswa embonini yokubona komshini afaka phakathi amalensi e-FA, amalensi e-telecentric, kanye namalensi e-microscope ezimboni.

Izinhlobo ezahlukene zamalensi ezimboni

5.Izinto ezibalulekile okufanele uzicabangele lapho ukhetha amalensi ezimboni

Uma ukhethailensi, kumele siqale sinqume izidingo zeklayenti:

1) Insimu yokubuka, ukukhuliswa kokukhanya, kanye nebanga lokusebenza elifiswayo: Lapho sikhetha ilensi, sikhetha eyodwa enensimu yokubuka enkulu kancane kunento ehlolwayo ukuze kube lula ukulawula ukunyakaza.

2) Ukujula kwezidingo zensimu: Kumaphrojekthi adinga ukujula okuthile kwensimu, sebenzisa imbobo encane kakhulu; uma ukhetha ilensi, khetha ukukhulisa okuphansi kakhulu okuvunyelwe yimingcele yephrojekthi. Kuzinhlelo zokusebenza ezidinga amandla, beka phambili amalensi aphezulu anikeza ukujula okuphezulu kwensimu.

3) Usayizi wenzwa kanye nesixhumi esibonakalayo sekhamera: Isibonelo, ilensi engu-2/3″ isekela usayizi omkhulu wesenzwa yekhamera yezimboni ongu-2/3″; ayikwazi ukusekela amakhamera ezimboni anezinzwa ezinkulu kune-intshi eyodwa.

4) Naka ukuxhumana nomthombo wokukhanya bese ukhetha ilensi efanelekile.

5) Indawo yokufaka: Uma uhlelo lokuklama seluvele lunqunyiwe, akunangqondo ukucela iklayenti ukuthi lishintshe ubukhulu bemishini.