Recording and reconstruction of a color holographic image by using digital lensless Fourier transform holography

Abstract

The numerical recording and reconstruction of a color holographic image are achieved by using digital lensless Fourier transform holography. Firstly, for a color object, three monochromatic digital holograms with different wavelengths (red, green, blue) are recorded by a black-white CCD, respectively. Then the reconstructed monochromatic holographic images (red, green, blue) are adjusted to be same in size through padding digital holograms with zeros, and the corresponding digital color holographic image is acquired by accurately syncretizing the resized reconstructed monochromatic images. One of the advantages using lensless Fourier transform holography is that it can well assure the precise superposition of the reconstructed images. By applying median filtering technique and superposing the speckle fields with different distributions, the speckle noises are well suppressed and the quality of the digital color holographic image is greatly improved. This digital color holography with high quality of reconstruction effect would have potential applications on digital holographic display of color objects.

Self-calibration for lensless color microscopy

“…• A trichromatic hologram artificially formed by the concatenation of three holograms recorded by a monochromatic sensor without mosaicking as in [50,51] (case 4 denoted λ R,G,B )…”

Real-Time Colour Holographic Interferometry (from Holographic Plate to Digital Hologram)

“…Such strategy was also considered by J. Zhao et al, 2008, by using three laser wavelengths as an imaging approach. All these methods use sequential recording at each wavelength and generally off axis reference waves are incident on the recording area at a constant angle.…”

Research on true color computer generated hologram by lensless Fourier transform

“…As we know, Fresnel diffraction integral is a basal reconstruction computation tool. Color holographic display technology as an important content in the holographic display, mainly includes the traditional rainbow holographic (also known as the pseudo-color holographic) reconstructed by, color digital holographic [2] and Fourier transform holographic [3], and so on. Color digital holographic needs the three-colored lights (RGB) to shine the object respectively to record the three-color holograms; while the reconstruction process is to reconstruct the three-color holograms respectively and synthesize them to get the object's reconstructed image [4].…”