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In this research we have been studied the 3rd order spherical aberration for an optical system consisted of obscured circular aperture with non central circular obscuration through the calculation of point spread function (P.S.F) in presence of the obscuration in the center and comparing the obtained results with that results of moving obscuration far away from the center, where the results showed significant improvement for(P.S.F) value. The study was done of different obscurities ratios in addition to the different 3rd order spherical aberration values (W40=0.25 ,0.5 ,0.75 ,1 ).
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Journal BS. Study of effect of non-central obscuration to obscured circular aperture on third order spherical aberration : Adnan falih hassen | Munther bakir hessen | Talib abdul rudha abdul wahid. Baghdad Sci.J [Internet]. 2012Jun.3 [cited 2021Jul.28];9(2):236-43. Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/1356