Parallel phase-shifting color digital holography using two phase shifts

Abstract

We propose parallel phase-shifting color digital holography using two phase shifts. This technique enables the instantaneous acquisition of three-dimensional information of a moving color object. The interference fringe image that contains six holograms with two phase shifts for three wavelengths is recorded by a single shot exposure. Decreasing the degree of space-division multiplexing of these holograms makes it possible to suppress the degradation of the image quality owing to the aliasing caused by the multiplexing. Numerical simulation and preliminary experiments demonstrate the validity of the proposed technique; the reconstructed images of the proposed technique are clearer than those of the previously reported single-shot phase-shifting color digital holography that uses four phase steps.

Demonstrative experiment study on the consistency of two-slit interference and diffraction phenomenon

“…The content is mainly about the wave optics, which has played the important role in kinds of fields, such as interference measurement [1][2][3][4] , digital microscopic holography [5][6][7][8][9] , three-dimensional display [10][11][12] et al The content for this part of course is arranged as Young's double-slit interference, one-slit Fraunhofer diffraction and grating diffraction, which are related with interference, diffraction and interference& diffraction. And the fundamental knowledge is interference and diffraction.…”

Research on true color computer generated hologram by lensless Fourier transform

“…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]. However, in the process of synthesizing the reconstructed image of the color holograms under multiple wave length, the lateral resolution of the reconstructed images also vary due to different reconstructed wave length, causing different positions and sizes of each single reconstructed image, and causing low resolution of the directly synthesized reconstructed image and color difference.…”

Multiple color images encryption by triplets recombination combining the phase retrieval technique and Arnold transform

“…Another common approach is single-channel optical realization based on digital transformation of the color image to indexed type [21], which is more compact and reliable when comparing with multichannel ones. Recently, parallel phase-shifting digital holography technology [25,26] is proposed which can be used to realize the color image hybrid recording. There are a number of related security systems for color image processing having been done.…”

“…It shows that since more information is contained in a single color image than the gray or binary one, to realize the multiple color images security will be even more complicated than other methods [11,12,14,[16][17][18][19][20][21][22][23][24]. In order to promote the system performance for color image processing, digital means should be used as an assistant way for their potential value in many occasions [16][17][18][19][20][21][22][23][24][25][26].…”