Yintoni ekufuneka iqwalaselwe xa ukhetha iilensi zezimboni?

1.Iilensi zokufakelwa kwemizi-mveliso

Kukho ezintathu eziphambiliilensiIindidi zokufaka: I-F-mount, i-C-mount, kunye ne-CS-mount. I-F-mount yi-universal mount, ifaneleka kakhulu kwiilensi ezinobude obungaphezulu kwe-25mm; ngelixa xa ubude obuphezulu belensi ejolise kumgca bungaphantsi kwe-25mm, ngenxa yobukhulu obuncinci belensi ejolise kumgca, kusetyenziswa i-C-mount okanye i-CS-mount, kwaye ezinye zisebenzisa i-M12 mount.

Umahluko phakathi kwe-Ckhwelisakunye ne-CSkhwelisa:

Umahluko phakathi kwe-C-mount kunye ne-CS-mount interfaces usekwe kumgama ukusuka kumphezulu woqhagamshelwano lwekhamera yelensi ukuya kwindawo egxile kwilensi (indawo apho ikhoyo i-CCD image sensor yekhamera): lo mgama yi-17.53 mm kwi-C-mount kunye ne-12.5 mm kwi-CS-mount.

Iilensi ze-C-mount ziyahambelana neekhamera ze-C-mount, kwaye iilensi ze-CS-mount ziyahambelana neekhamera ze-CS-mount. Ilensi ye-C-mount ingasetyenziswa nekhamera ye-CS-mount ngokongeza iringi ye-adaptha ye-5mm C/CS. Nangona kunjalo, ilensi ye-CS-mount ayinakusetyenziswa nekhamera ye-C-mount.

Iilensi zokufakelwa kwemizi-mveliso

2.Iiparameter ezisisiseko zeelensi zemizi-mveliso

1)Intsimi yokujonga (i-FOV): Ibhekisa kwindawo ebonakalayo yento ebonwayo—ngokukodwa, inxalenye yento egcwalisa isenzi somfanekiso sekhamera. (Indawo yokujonga yinto ebalulekileyo ekufuneka iqwalaselwe xa ukhetha imodeli.)

Umzobo webala lokujonga

2)Umgama Wokusebenza (WD): Ibhekisa kumgama ukusuka ngaphambiliilensikwinto ehlolwayo—ngokukodwa, umgama oya kumphezulu apho umfanekiso ocacileyo wenziwa khona. (Izinto ezibalulekileyo ekufuneka ziqwalaselwe ngexesha lokukhetha ziquka ukuba umgama wokusebenza uyalungiseka na kwaye ingaba kukho indawo eyaneleyo yokufaka.)

3)Isisombululo: Ubungakanani bento encinci enokusombululeka kwinto ehlolwayo enokufunyanwa yinkqubo yomfanekiso. Kwiimeko ezininzi, okukhona intsimi yombono incinci, kokukhona isisombululo singcono.

4)Ubunzulu beNtsimi (DOF): Amandla elensi okugcina isisombululo esifunekayo xa into ibekwe kufutshane okanye kude nendawo ephambili yokugxila. (Kuyimfuneko ukumisela ukuba umthengi uneemfuno ezithile malunga nobunzulu bentsimi.)

Ubunzulu bomzobo wentsimi

3.Ezinye iiparameter zeelensi zemizi-mveliso

1)Ubungakanani benzwa yomfanekiso: Ubungakanani bendawo esebenzayo yesenzi somfanekiso sekhamera, ngokuqhelekileyo sibhekisa kubukhulu obuthe tye. Le parameter ibalulekile ekumiseleni ukwandiswa kwelensi efanelekileyo ukuze kufezekiswe intsimi yombono oyifunayo. Ukwandiswa kwelensi ephambili (PMAG) kuchazwa ngumlinganiselo wobukhulu besenzi somfanekiso kwintsimi yombono. Nangona ubungakanani besenzi somfanekiso kunye nentsimi yombono ziyiparameters ezisisiseko, iPMAG ngokwayo ayihlelwanga njengenye.

Umzobo wesicwangciso se-chip ebuthathaka kwi-photosensitive

2)Ubude befokhalthi (f): Umlinganiselo wokudibana okanye ukwahluka kokukhanya kwinkqubo ye-optical, echazwa njengomgama ukusuka kwiziko le-optical le-ilensiukuya kwindawo ephambili apho ukukhanya kuhlangana khona. Kwikhamera, ibhekisa kumgama ukusuka embindini welensi ukuya kwindawo yokuthatha imifanekiso (njengefilimu okanye isenzi se-CCD). (Ifomula ekufuneka uyikhumbule): f = {Umgama wokusebenza / Icala elide (okanye Icala elifutshane) leNdawo yokujonga} × Icala elide (okanye Icala elifutshane) le-CCD.

Iziphumo zobude befocal zimi ngolu hlobo lulandelayo: Okukhona ubude befocal bufutshane, kokukhona ubunzulu bentsimi bubukhulu; okukhona ubude befocal bufutshane, kokukhona ukugqwetheka kukhulu; kwaye okukhona ubude befocal bufutshane, kokukhona ukuqaqamba kukhulu, nto leyo ebangela ukuba ukukhanya kunciphe emaphethelweni omfanekiso.

3)Isisombululo: Ibonisa ulwahlulo oluncinci phakathi kwamanqaku amabini abonakala ngeseti yeelensi ezijolise ngqo.

0.61 × Ubude bobude (λ) / NA = IsiGqibo (μ)

Indlela yokubala engentla inokumisela ngokwethiyori isisombululo, kodwa ayibaleli ekugqwethweni.

※ Ubude begagasi obusetyenzisiweyo: 550nm

4)Amandla okusombulula: Inani leepawundi zomgca omnyama nomhlophe ezibonakalayo ngaphakathi kwe-1 mm span; iyunithi: (lp)/mm.

I-MTF (Umsebenzi Wokudlulisa Imodyuli)

Umzobo we-MTF

5)Uphazanyiso: Enye yeendlela zokulinganisa ezisetyenziselwa ukuvavanyailensiukusebenza. Ibhekisa kwimpazamo yomfanekiso kwinkqubo yokukhanya apho imigca ethe tye elele kwindawo ekuthethwa ngayo—kodwa engadluli kwi-axis yokukhanya—ibonakala njengemigca egobileyo kumfanekiso ophumayo. Ukuphazamiseka kokuphambuka kuchaphazela kuphela ijiyometri yomfanekiso, kungekhona ubukhali bawo.

6)Imbobo kunye nenombolo ye-F: I-aperture yindlela—ehlala ikwi-lens—elawula ubungakanani bokukhanya okungena kwi-lens. Ubungakanani be-aperture bubonakaliswa kusetyenziswa amanani e-F, afana ne-F1.4, F2.0, kunye ne-F2.8.

Umzobo wexabiso le-Aperture

7)Ukwandiswa kokukhanya: Ifomula esetyenzisiweyo ukubala ukukhulisa okuphambili yile ilandelayo: I-PMAG = Ubungakanani besenzi somfanekiso (mm) / Intsimi yokujonga (mm).

8)Ukwandiswa koMboniso: Ukwandiswa kwesiboniso kusetyenziswa kakhulu kwi-microscopy. Ukwandiswa kwesiboniso sento ejongwayo kuxhomekeke kwizinto ezintathu: ukwandiswa kwe-optical kwe-ilensi, ubungakanani besixhobo somfanekiso sekhamera yemizi-mveliso (ifomathi yesenzi), kunye nobukhulu besikrini sokubonisa.

Ukwandiswa koBoniso = Ukwandiswa kokukhanya kweLens × Ubungakanani beMonitha × 25.4 / Ubungakanani beDiagonal yeSensor

4.Iindidi eziphambili zeelensi zemizi-mveliso

Indlela yokuhlela:

1) Ihlelwe ngokwe-focal length: i-focal length esisigxina kunye ne-zoom focal length;

2) Ihlulwe ngokwe-aperture: i-aperture esisigxina kunye ne-aperture eguquguqukayo;

3) Ihlelwe ngokwe-mount: i-C-mount, i-CS-mount, i-F-mount, njl.njl.;

4) Ihlelwe ngokwendlela yokukhulisa: iilensi zokukhulisa ezizinzileyo kunye neelensi zokusondeza eziqhubekayo;

Iilensi eziphambili ezisetyenziswa kakhulu kushishino lombono womatshini ziquka iilensi ze-FA, iilensi ze-telecentric, kunye neelensi ze-microscope zoshishino.

Iindidi ezahlukeneyo zeelensi zemizi-mveliso

5.Izinto ezibalulekileyo ekufuneka uziqwalasele xa ukhetha iilensi zemizi-mveliso

Xa ukhethailensi, kufuneka siqale sifumanise iimfuno zomthengi:

1) Intsimi yokujonga, ukukhulisa okubonakalayo, kunye nomgama ofunekayo wokusebenza: Xa sikhetha ilensi, sikhetha enye enentsimi yokujonga enkulu kancinci kunento ehlolwayo ukuze kube lula ukulawula intshukumo.

2) Ubunzulu beemfuno zentsimi: Kwiiprojekthi ezifuna ubunzulu obuthile bentsimi, sebenzisa i-aperture encinci kangangoko; xa ukhetha ilensi, khetha eyona nkulu iphantsi kangangoko evunyelwe yimida yeprojekthi. Kwiizicelo ezifuna umgudu, beka phambili iilensi eziphezulu ezibonelela ngobunzulu obuphezulu bentsimi.

3) Ubungakanani benzwa kunye nojongano lwekhamera: Umzekelo, ilensi ye-2/3″ ixhasa ubungakanani benzwa yekhamera yemizi-mveliso obukhulu be-2/3″; ayinakuxhasa iikhamera zemizi-mveliso ezineenzwa ezinkulu kune-intshi enye.

4) Nika ingqalelo kunxibelelwano nomthombo wokukhanya kwaye ukhethe ilensi efanelekileyo.

5) Indawo yokufaka: Xa isicwangciso soyilo sele sigqityiwe, akunakwenzeka ukucela umthengi ukuba atshintshe ubukhulu bezixhobo.