The Fourier Transform Holography (FTH) in the range of soft X- rays is a fast growing research field supported by the development of Free Electron Lasers (FEL). In the conventional FTH with only one pinhole as reference, the signal intensity is very weak when it comes to measurements on a very short time scale. Fortunately, the high transverse coherence of the FEL- beam enables the creation of expanded reference structures leading to a high signal intensity in a short exposure time. In this thesis two expanded reference structures are investigated, the multiple and the extended...