Large scale and high resolution computer generated synthetic color rainbow hologram

In this study, we propose a method for calculating a large scale high resolution synthetic color rainbow hologram using the frequency domain splicing technique. This method is motivated by the observation that if the plane wave is used as the reference light, the spectra of the three primary colors of the object light in the color rainbow hologram frequency domain are mutually separated frequency bands. According to this principle, the color views of different angles of a colored 3D object are separated and interpolated, and 2D Fourier transform is performed to form an object light spectrum distribution of the color rainbow hologram. Following the operation, efficient one-dimensional Fourier inverse transform in the row and column directions of the frequency is conducted. The proposed method is able to achieve a significant boost in terms of large scale high resolution hologram computational speed. We demonstrate that a synthetic color rainbow hologram with a size of 30 × 30 mm and a resolution of 94 340 × 94 340 is achieved through our holographic printing system with an unprecedented time of only 25 min. The method is also able to achieve a visually appealing computer generated white light color rainbow hologram, thus having great potential to be used for a practical holographic 3D display.