Kyu B. Doh Virginia Polytechnic Institute and State Univ. (South Korea) Ting-Chung Poon Virginia Polytechnic Institute and State Univ. (United States) Guy J. M. Indebetouw Virginia State Univ. (United States)
In optical scanning holography, holographic information of an object is generated by 2-D active optical scanning. The optical scanning beam can be a time-dependent Gaussian apodized Fresnel zone plate. We first derive the resolution achievable with such a scanning beam. We then show through computer simulations that the use of a larger Fresnel zone plate for holographic recording leads to a noisier twin-image reconstruction in the near field, thereby degrading the resolution. This is particularly noticeable with objects of more complicated structures.