Method for correcting optical wavefront errors and optical system, such as a telescope, produced accordingly

TL;DR: In this article, the optical wavefront is calculated for different wavelengths and fields of view between the entry pupil (EP) and exit pupil (AP), and any phase differences are compensated by at least one surface compensating the phase differences in the beam path.

Abstract: In a method for correcting optical wavefront errors in an optical system, the optical wavefront is calculated for different wavelengths and fields of view between the entry pupil (EP) and exit pupil (AP). Any phase differences are compensated by at least one surface (5, 7) compensating the phase differences in the beam path. A particular optical system, expediently in the form of a telescope, accordingly has a beam path which comprises the following: a first reflector (3), arranged along its axis (A), for reflecting a beam (1) incident along an optical axis (O) onto a concave second reflector (4) which throws the beam obtained from the first reflector (3) onto a third reflector (5), from which it is passed to a concave fourth reflector (6) in order to be reflected at an angle with said optical axis (O). Such a means (5, 7) for correcting the wavefront errors is provided in the beam path of such an optical system. The axis (A) of the first reflector (3) can optionally make an angle (α) of 0° with the optical axis (O); the means (5, 7) permits the correction of asymmetry errors resulting from the angular position.