METHOD FOR PRODUCING A CONCAVE/CONVEX GRATING FOR A MONOCHROMATOR AND SUCH A GRATING

摘要

A method for producing a concave or convex grating (1) for a monochromator. In order not to be subject to any restrictions in respect of a specific wavelength when designing the grating and, moreover, in order to be able to produce a blazed grating without a subsequent production step, provision is made according to the invention for the method to comprise the calculation of coordinates of grating points (6) of grating lines (2) on a rotary body (3) by virtue of points of intersection of a family of auxiliary surfaces with a surface of the rotary body (3) being determined, wherein the family of auxiliary surfaces are generated by a family of second order curves, which rotate about an axis of rotation (x) of the rotary body (3), the method furthermore comprising the feeding of the coordinates of the points of intersection or of the grating points (6) into a computer-controlled ultra-precise turning machine in order to turn a grating structure, which corresponds to circles centred about the axis of rotation (x) or to a spiral extending around the axis of rotation (10), into a main body which, at least in portions, has the form of the rotary body (3).