Eğimli düzlemler arasında holografik desen hesaplanması

ABSTRACTCOMPUTATION OF HOLOGRAPHICPATTERNS BETWEEN TILTED PLANESGükhan Bora EsmeroM.S. in Electrical and Electronics EngineeringSupervisor: Prof. Dr. Levent OnuralJune 2004Holography is a three-dimensional visualization method. This method dependson duplication of information-carrying optical waves which come from a three-dimensional environment in the absence of the original source. Computation ofthe diffraction pattern due to an object is the most important process in digitalholography. The diffraction pattern due to an object can be calculated by us-ing several methods. Two models are generated and they are based directly onRayleigh-Sommerfeld diffraction integral; there is no need for Fresnel or Fraun-hofer approximations. The generated models are used to calculate scalar opticaldiffraction between tilted planes for monochromatic light. First model we gener-ate is called pointwise model. The model provides calculation of the diffractionpattern on an observation plane by superposition of the diffraction patterns ofthe point light sources that made up the object on a input plane. However, it isa time consuming process. Second model is named plane wave spectrum modeland it is much more faster than the pointwise model. The performances of thepresented models are examined under several scenarios.Keywords: Digital Holography, Plane Wave Spectrum Diffraction, Scalar OpticalDiffraction, Fresnel Diffraction, 3-D Objects.iii