Two Line Resolutions with circular apertures and Band pass apertures in the presence of Defocusing aberration.

  • T.Kiran Kumar Osmania University, Hyderabad
  • A. Narsaiah. Osmania University, Hyderabad
  • D. Karuna Sagar. Osmania University
Keywords: Defocus, shading, band pass, resolution and apodisation


The defocus aberration can be applied to the optical system it was observed that deviations from this treatment must be expected in the immediate neighborhood of the boundaries i.e., shading of the apertures in the regions where a large number of rays meet. Several attempts have been made to obtain the homo-centricity in the direction of minimizing the aberrations by assigning different values to the constructional parameters of the lens systems, resulting in the design of several refined optical systems. Even though a great deal of success was obtained in two line resolution of optical system, in certain regions the simple geometrical treatment of the aperture found to be inadequate

Author Biographies

T.Kiran Kumar, Osmania University, Hyderabad

Research Scholar

Department of Physics

A. Narsaiah., Osmania University, Hyderabad

Research Scholar

department of Physics

D. Karuna Sagar., Osmania University


Department of Physics