Unganquma Kanjani Ukuthi Ilensi Inekhwalithi Enhle Yokuthatha Izithombe?

Ukwahlulela ukuthi ikhwalithi yesithombe se-ilensi yokukhanyakuhle, kudingeka amazinga athile okuhlola, njengokuhlola ubude be-focal, insimu yokubuka, isixazululo, njll. selensi. Konke lokhu kuyizinkomba ezivamile. Kukhona nezinye izinkomba ezibalulekile, njenge-MTF, ukuhlanekezela, njll.

1.I-MTF

I-MTF, noma umsebenzi wokudlulisa i-optical modulation, ingalinganisa izici zesithombe, njengemininingwane, umehluko, kanye nokucaca. Ingenye yezinkomba zokuhlola ngokuphelele ikhwalithi yesithombe selensi.

Ku-MTF two-dimensional coordinate curve, i-Y axis ivame ukuba yinani (0~1), kanti i-X axis iyimvamisa yendawo (lp/mm), okungukuthi, inani "lama-line pairs". Imvamisa ephansi isetshenziselwa ukuhlola umehluko wesithombe ngemva kokuthwebula izithombe, kanti imvamisa ephezulu isetshenziselwa ukuhlola ukucaca kanye nesisombululo selensi, okungukuthi, ikhono lokuhlukanisa imininingwane.

Isibonelo, kumalensi ezithombe, i-10lp/mm ivame ukusetshenziselwa ukuhlola umphumela wokuqhathanisa, kanti inani le-MTF ngokuvamile liphakeme kune-0.7 ukuze libhekwe njengelihle; imvamisa ephezulu ihlola i-30lp/mm, ngokuvamile inkulu kune-0.5 engxenyeni yensimu yokubuka, futhi inkulu kune-0.3 emaphethelweni ensimu yokubuka.

Ukuhlolwa kwe-MTF

Kweminye imishini yokukhanya nomaamalensi ezimboni, banezidingo eziphakeme zemvamisa ephezulu, ngakho-ke singabala kanjani imvamisa ephezulu esifuna ukuyihlola? Eqinisweni, kulula kakhulu: imvamisa = 1000/(2×usayizi wephikseli yenzwa)

Uma usayizi wephikseli yesenzwa oyisebenzisayo ungu-5um, khona-ke imvamisa ephezulu ye-MTF kufanele ihlolwe ku-100lp/mm. Uma inani elilinganisiwe le-MTF liphakeme kuno-0.3, liyilensi enhle kakhulu.

2.Ukuhlanekezela

I-MTF ayikwazi ukukhombisa ukuphambuka kokuphambuka, ngakho ukuphambuka kufakwa ohlwini ngokwehlukana. Ukuphambuka, noma ukuguqulwa, kungahlukaniswa kube ukuphambuka kwe-pincushion kanye nokuphambuka kwebharele.

Ukuhlanekezela kuhlobene nensimu yokubuka. Uma insimu yokubuka inkulu, kulapho ukuhlanekezela kuba kukhulu khona. Kumalensi ekhamera avamile namalensi okuqapha, ukuhlanekezela okungaphakathi kuka-3% kuyamukeleka; kumalensi ane-wide-engela, ukuhlanekezela kungaba phakathi kuka-10% no-20%; kumalensi e-fisheye, ukuhlanekezela kungaba ngu-50% kuya ku-100%.

Umphumela wokuhlanekezela ngelensi ye-fisheye

Ngakho-ke, unquma kanjani ukuthi ufuna ukulawula ukuphambuka kwelensi okungakanani?

Okokuqala, udinga ukunquma ukuthi yiniilensiisetshenziselwa. Isibonelo, uma isetshenziswa ekuthwebuleni izithombe noma ekuqapheni, khona-ke ukuphambuka kwelensi ngaphakathi kuka-3% kuvunyelwe. Kodwa uma ilensi yakho isetshenziselwa ukukala, khona-ke ukuphambuka kufanele kube ngaphansi kuka-1% noma ngaphansi. Vele, lokhu kuncike ephutheni lesistimu elivunyelwe uhlelo lwakho lokulinganisa.

Imicabango Yokugcina:

Ngokusebenzisana nochwepheshe eChuangAn, kokubili ukuklama kanye nokukhiqiza kuphathwa onjiniyela abanekhono eliphezulu. Njengengxenye yenqubo yokuthenga, ummeleli wenkampani angachaza ngokuningiliziwe ulwazi oluthile mayelana nohlobo lwelensi ofisa ukuyithenga. Uchungechunge lwemikhiqizo yelensi kaChuangAn lusetshenziswa ezinhlobonhlobo zezicelo, kusukela ekuqapheni, ekuskeneni, kuma-drones, ezimotweni kuya emakhaya ahlakaniphile, njll. I-ChuangAn inezinhlobo ezahlukene zamalensi aqediwe, angashintshwa noma enziwe ngezifiso ngokwezidingo zakho. Xhumana nathi ngokushesha okukhulu.