The present invention concerns a diffuse white reflector for optical systems, in particular optical measurement systems, as well as a process for the production of a diffuse white reflector and the use of a diffuse white reflector, the diffuse white reflector having a surface with a reflective material,which reflects light diffusely, the white reflector (1) having a film (3) and a carrier (2) on which the film is arranged, and the film having the surface with the reflecting material.
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