COATED OPTICAL ELEMENT FOR CORRECTIVE ACTION OBTAINED BY PRODUCING LAYER THICKNESS VARIATIONS OR BY REFRACTION FACTOR VARIATIONS IN SAID COATING

摘要

The inventive optical element (10, 10') comprises a body (12) and a coating (8, 18) applied thereto and is used for modifying reflectivity. Corrective structures (23) for correcting representation errors, for example by a local material removal or by a local modification of a refraction index are formed in the coating. When said coating (18) comprises an outward directed upper layer (186) and one or several interlayers (181 to 185) which are disposed between the upper layer (186) and the body (12) the corrective structures preferably are not arranged in the upper layer (186) but in one of the interlayers. Said optical element (10, 10') is embodied in such a way that it is mechanically stable and better resistant to contamination than the optical elements in which the material removal for a corrective action is carried out directly on the element body