Large scale and high resolution computer generated synthetic color rainbow hologram

Abstract

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.

High-Resolution Hologram Calculation Method Based on Light Field Image Rendering

“…The pixel pitch h d of the hologram is 0.318 μm, which is determined by our holographic printer [9][10][11]. This principle of the home-made holographic printer is similar with the holographic printer introduced in reference [12], but the light source in our holographic printer is a blue LED with center wavelength of 365 nm rather than a laser.…”

“…High-resolution holograms such as rainbow holograms and Fresnel holograms are applicable for 3D advertising and packaging because of the emerging of holographic printing technology [9][10][11][12][13][14]. The biggest challenge for high-resolution holography is the huge amount of computation.…”

“…However, those methods are not effective for reducing the calculation burden for high-resolution hologram. We have proposed frequency fusing methods similar to holographic stereogram for full-parallax image hologram [11] and color rainbow hologram [10] calculation with high efficiency but the sizes of calculated hologram are limited by the RAM (Random Access Memory) of computer. Rectangular tiling algorithms have been proposed for high-resolution hologram calculation free of limitation from computer RAM [19,20].…”

High-Resolution Hologram Calculation Method Based on Light Field Image Rendering

“…High-resolution holograms such as rainbow holograms and Fresnel holograms are applicable for 3D advertising and packaging because of the emergence of holographic printing technology [9][10][11][12][13][14]. The biggest challenge for high-resolution holography is the huge amount of computation.…”

High-Resolution Hologram Calculation Method Based on Light Field Image Rendering

“…However, those methods are not effective for reducing the calculation burden for high-resolution hologram. We have proposed frequency fusing methods similar to holographic stereogram for full-parallax image hologram [11] and color rainbow hologram [10] calculation with high efficiency but the sizes of calculated holograms are limited by the RAM (Random Access Memory) of computer. Rectangular tiling algorithms have been proposed for high-resolution hologram calculation free of limitation from computer RAM [19,20].…”