Optical properties with high non-linearity such as a modulation transfer
function (MTF) are efficiently optimized at high speed compared to conventional
methods. An optimal solution of an optical system is obtained in a first optimization
unit using a merit function on aberration. Weights or target values of the merit
function on aberration is automatically adjusted in a second optimization unit
in a manner that an evaluated value of the MTF or the like approaches a desired
value. The first optimization unit re-optimizes the optical system using the weights
or target values which have been automatically adjusted. Thus, automated is a function
equivalent to the operation which has been conducted by a designer such as adjustment
to weights or target values.
