Dažādu acs modeļu optisko parametru izpēte
Date
2019
Authors
Brigzna, Kornēlija
Journal Title
Journal ISSN
Volume Title
Publisher
Latvijas Universitāte
Abstract
Bakalaura darbs ir uzrakstīts latviešu valodā uz 32 lappusēm, satur 15 attēlus, 7 tabulas un 28 atsauces uz literatūras avotiem. Mērķis: novērtēt, kurš literatūrā aprakstītais acs modelis vislabāk atbilst lielas cilvēku populācijas vidējiem acs optiskajām parametriem. Secinājumi: 1.Modulācijas pārneses funkcijas pamatā esošais salīdzinājums piecu teorētisko modeļu gadījumā, kas zināmi no literatūras, atklāj, ka Liu un Brenana modelis uzrāda vislabāko modulācijas pārneses funkciju. Pēc korelācijas analīzes un vismazāko kvadrātu metodes Gulstranda acs modelis uzrādīja vistuvākos rezultātus cilvēka acs modulācijas pārneses funkcijai. 2.Liu un Brenana modelis uzrādīja visaugstāko robežfrekvenci modulācijas pārneses funkcijai, tādējādi iegūstot redzes asumu V=4,00 dec. v., savukārt pēc modeļa punkta izkliedes funkcijas pilna platuma pusē maksimuma metodes uzrādot redzes asumu V=2,80 dec. v., atšķiroties no cilvēka populācijas vidējā redzes asuma, kas ir 0,98 ± 0,68 dec. v.. Emsleja, Gulstranda, Helmholca un Šviegerlinga modeļu rezultāti ietilpst lielas cilvēku populācijas vidējās redzes asuma robežās. 3.Liu un Brenana modelis polihromatiskā gaismā uzrāda vismazāko hromatiskās aberācijas dioptrisko nobīdi 0,35 D. Gulstranda, Helmholca, Šviegerlinga, Liu un Brenana acs modeļi labāk raksturo cilvēka vidējo hromatiskās aberācijas nobīdi, ietilpstot abu cilvēku hromatisko aberāciju pētījumu rezultātu robežās.
Bachelor’s paper has been written in latvian and consists of 32 pages, contains 15 figures, 7 tables and 28 bibliographic sources. Purpose: assess which eye model described in the literature best corresponds to the average eye optical properties of a large human population. Conclusions: 1.The underlying comparison of the modulation transfer function for the five theoretical models known from the literature reveals that the Liou and Brennan model shows the best modulation transfer function. After correlation analysis and least squares method, the Gullstrand eye model showed the closest results to a modulation transfer function of a human eye. 2.The Liou and Brennan model showed the highest cut-off frequency for the modulation transfer function, thus obtaining visual acuity of V = 4,00 dec. u., however, after the model point spread function with full width half maximum method visual acuity is V = 2,80 dec. u., differing from the mean of a human population which is 0,98 ± 0,68 dec. u. The results of the Emsleys, Gullstrand, Helmholtz and Schwiegerling models fall within the limits of the mean visual acuity of a large human population. 3.The Liou and Brennan model exhibits the least chromatic aberration dioptric shift in polycromatic light 0,35 D. Gullstrand, Helmholtz, Schwiegerling, Liou and Brennans eye models better describe human chromatic aberration offset, within the results of both studies of chromatic aberrations in humans.
Bachelor’s paper has been written in latvian and consists of 32 pages, contains 15 figures, 7 tables and 28 bibliographic sources. Purpose: assess which eye model described in the literature best corresponds to the average eye optical properties of a large human population. Conclusions: 1.The underlying comparison of the modulation transfer function for the five theoretical models known from the literature reveals that the Liou and Brennan model shows the best modulation transfer function. After correlation analysis and least squares method, the Gullstrand eye model showed the closest results to a modulation transfer function of a human eye. 2.The Liou and Brennan model showed the highest cut-off frequency for the modulation transfer function, thus obtaining visual acuity of V = 4,00 dec. u., however, after the model point spread function with full width half maximum method visual acuity is V = 2,80 dec. u., differing from the mean of a human population which is 0,98 ± 0,68 dec. u. The results of the Emsleys, Gullstrand, Helmholtz and Schwiegerling models fall within the limits of the mean visual acuity of a large human population. 3.The Liou and Brennan model exhibits the least chromatic aberration dioptric shift in polycromatic light 0,35 D. Gullstrand, Helmholtz, Schwiegerling, Liou and Brennans eye models better describe human chromatic aberration offset, within the results of both studies of chromatic aberrations in humans.
Description
Keywords
Fizika , Acs modelis , Acs modeļu simulēšana , Modulācijas pārneses funkcija , Aberācijas