| 摘要 |
PROBLEM TO BE SOLVED: To obtain the imagery evaluating device for an optical system, which can obtain the intensity distribution of the image of a body by an imagery optical system at a high speed in high accuracy and can obtain the performance of the imagery optical system readily in high accuracy. SOLUTION: A memory means 2, which stores various kinds of data with regard to light sources, bodies and imagery optical systems, a central processing means 1, which divides the light source into a plurality of point light sources and obtains the intensity distribution at the specified surface of the body with the luminous fluxes from a plurality of the point light source, and an output means, which outputs the result of the operation from the central processing means, are provided. The central processing means 1 divides the image of the light source formed on the pupil surface of an imagery optical system into the equal-distance rectangular lattice shape the same as a pupil dividing method, divides the light source to be obtained when the divided image is reversely projected on the light source and replaces the Fourier transform of the body corresponding to the position of the individual point light source, which is obtained by the division, by the Fourier transform of the body, which is obtained for the point light source at a certain specified position, by deviating the position at the Fourier transform surface of the body in correspondence with the position of the individual light source. Thus, the intensity distribution of the image of the body is obtained. |
