• Title, Summary, Keyword: Lohmann-type binary hologram

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A Study on Lohmann Type Computer Generated Holograms Using a Circular Cell (원형 셀을 이용한 Lohmann형 컴퓨터 형성 홀로그램에 관한 연구)

  • Seo, Choon-Su;Jeong, Man-Ho
    • Korean Journal of Optics and Photonics
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    • v.17 no.6
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    • pp.519-524
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    • 2006
  • In general, the Lohmann-type binary hologram represents its amplitude and phase by using the rectangular cell. In this paper, we adapts a circular cell to represents the amplitude and phase of holograms. In order to compare the characteristics of the circular cell with the rectangular one, we analyzed the results based on the computer simulations and various optical experiments. The results show that a clearer reconstructed image can be obtained by dividing one cell into many pixels. In the case of a uniform reconstructed image, the rectangular cell is better than the circular cell. However, as for the brightness of the reconstructed image, the circular cell is better than the rectangular one.