Numerical investigation of zoomable holographic projection without a zoom lens

作者：Shimobaba Tomoyoshi^*; Kakue Takashi; Masuda Nobuyuki; Ito Tomoyoshi

来源：Journal of the Society for Information Display, 2012, 20(9): 533-538.

DOI：10.1002/jsid.116

• Holographic projection
• holography
• hologram
• computer-generated hologram
• laser display

Holographic projection is for laser displays and has the merits of being aberration free, producing high-contrast images, having the ability of color reconstruction with one spatial light modulator, and so on. In this paper, we propose a zoomable holographic projection without using a zoom lens and verify the proposed method by using numerical simulation. Although such a system can be readily realized to use the features of holography, which is capable of recording a large image exceeding the hologram size, the required calculation is very time consuming. For acceleration, we used shifted Fresnel diffraction for setting different sampling rates on a hologram and projected image. The proposed method can project any zoom-in and zoom-out image between zeroth-order and first-order lights, and the processing time and required memory for the zoom are constant.

• 出版日期2012-9