Straightforward computer-generated Fresnel hologram from multiple angular orthogonal projection images

By the multiple angular orthogonal projection images, a novel method for a straightforward computer-generated Fresnel hologram is demonstrated. With the angular orthogonal projection images at various viewpoints obtained from a computer designed three-dimensional object, an incoherent Fresnel hologram can be synthesized. After the shifted angular orthogonal projection images are multiplied by the constant phase factors and integrated, a two-dimensional complex matrix including three-dimensional information is achieved. The proposed Fresnel hologram is verified to be equivalent to an optical coherent Fresnel hologram. Since the diffraction and Fourier transform calculations are not necessary, the calculation complexity of the Fresnel hologram synthetic process can be greatly simplified.