COMPUTER-AIDED PERFORMANCE EVALUATION OF AN INCOHERENT TWO-DIMENSIONAL OPTICAL IMAGE UNDER PRIMARY SPHERICAL ABERRATION FROM THE ASPECT OF INFORMATIONAL CHANGE IN SPECTRAL FORM

摘要

The present article contains an extension of the investigations done so far on the problems of the informational change by incoherent optical imagery which often occur, for example, in the photographic practice. There is assumed a noiseless spherical dioptric optical imaging system with circular aperture the two-dimensional focused or defocused axial incoherent image formation of which is influenced by the primary spherical aberration. The considerations and results introduced relate to the linear and isoplanatic condition for intensity of the quasi monochromatic light. Informational change between the object and image plane is accepted for the image quality evaluation. This change is represented by the competent informational entropy loss expressed in the suitable spectral form. its values and graphical dependences are obtained by means of a computer for various values of the competent parameters. They endorse the idea of usefulness of the spectral form of informational entropy loss for suitable evaluation of the optical image performance. [References: 32]