METHOD FOR CENTERING OPTICAL ELEMENTS

A method for centering an optical element in an optical system for an endoscope, wherein the optical element has an optical axis aligned in the optical system such that the optical axis of the optical element coincides with an optical axis of the optical system, the method including: forming recesses into a circumference of the optical element, wherein in a cross-sectional plane of the optical element each recess includes a deepest point which has a smallest distance to the optical axis of the optical element, and the deepest points are located in the cross-sectional plane of the optical element on a circle, a center of the circle being located on the optical axis of the optical element; inserting a centering material into each of the recesses; and aligning the optical element in the optical system using the centering material in each of the recesses.