Patent ID: 8208184

Claim:
A holographic storage system, the system comprising: a light source for generating a reference beam or an object beam, a first objective lens for illuminating the reference beam or the object beam into a holographic storage medium, a region for holographic data storage of the holographic storage medium being located in or close to a Fourier plane of the objective lens, a 4f imaging system comprising a second objective lens and a third objective lens, at least one optical filter being arranged in a Fourier plane of the 4f imaging system for modifying an intensity profile of the reference beam or the object beam, wherein the optical filter is a transmissive filter with a transmissivity that increases from a lower value at the center of the optical filter to a higher value at the edge of the optical filter, or a reflective filter with a reflectivity that increases from a lower value at the center of the optical filter to a higher value at the edge of the optical filter.