Imaging properties of computer-generated holograms: the phase distribution effect in the objects’ space

• Main Authors: Koreshev Sergey, Smorodinov Denis, Marina Frolova, Starovoitov Sergei
• Format: Article
• Language: English
• Published: Peter the Great St.Petersburg Polytechnic University 2020-06-01
• Series: St. Petersburg Polytechnical University Journal: Physics and Mathematics
• Subjects: synthesized hologram; binarization; threshold processing; depth of field; phase mask
• Online Access: https://physmath.spbstu.ru/article/2020.48.09/

In the paper, the influence of phase distribution over the objects’ space on resolution and depth of field of computer-generated holograms has been investigated. The study was carried out through mathematical simulation of real physical processes of synthesis and reconstruction of binary transparent holograms. The possibility of a significant increase (up to several times) in the resolution and depth of field of the reconstructed image because of using phase-shift masks was found. Moreover, this increase was achieved due to representation of the object wave in hologram synthesis as a superposition of object waves emanating light from two identical objects located at different, strictly fixed distances from the hologram synthesis plane.