Defokusa un gaismas izkliedes salīdzinājums
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Latvijas Universitāte
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Abstract
Atslēgas vārdi: gaismas izkliede, defokusēs, pusdzīves frekvence, modulācijas pārneses funkcija.
-Darba mērķis: Noskaidrot, vai gaismas izkliede ietekmē defokusa pieauguma radītās attēla kvalitātes pazemināšanās straujumu un objektīvi salīdzināt gaismas izkliedes un defokusa apjomu.
-Metode: Eksperiments tiek veikts, izmantojot mākslīgo aci. Izmantotais mākslīgās tīklenes materiāls ir papīra lapa, uz kuras uzdrukāts melni balts taisnstūra veida režģis. Noteiktas gaismas caurlaidības gadījumā tiek salīdzināta pusdzīves frekvences vērtība.
-Rezultāti: Tika iegūts pusdzīves frekvenču starpību grafiks, kurā var salīdzināt pusdzīves frekvences defokusam un gaismas izkliedei.
Secinājumi: Modulācijas pārneses funkcijas dilšanas straujums ir piemērots lielums defokusa un gaismas izkliedes salīdzināšanai.
Key words: light scattering, defocus, half- life frequency, modulation transfer function. -Purpose: To find out whether the light scattering affects defocus gains in speed of reduced image quality and objectively compare the light scattering and defocus volume. -Methods: The experiment is conducted using the artificial eye. Artificial retina material is a piece of paper on which printed black white rectangular grating. In certain light transmission case half- life frequency value is compared. -Results: Half- life frequency difference plot was obtained, in which can compare half- life frequency and light scattering. -Conclusions; The descendness of rapidity of modulation transfer function is suitable size for comparison.of defocus and light scattering.
Key words: light scattering, defocus, half- life frequency, modulation transfer function. -Purpose: To find out whether the light scattering affects defocus gains in speed of reduced image quality and objectively compare the light scattering and defocus volume. -Methods: The experiment is conducted using the artificial eye. Artificial retina material is a piece of paper on which printed black white rectangular grating. In certain light transmission case half- life frequency value is compared. -Results: Half- life frequency difference plot was obtained, in which can compare half- life frequency and light scattering. -Conclusions; The descendness of rapidity of modulation transfer function is suitable size for comparison.of defocus and light scattering.