Dynamic holographic three-dimensional projection based on liquid crystal spatial light modulator and cylindrical fog screen

Abstract

A dynamic holographic three-dimensional (3D) projection based on phase-only liquid crystal spatial light modulator (LC-SLM) and cylindrical fog 3D screen is introduced. Sequential kinoforms of a 3D real existing object are calculated from sixty viewing angles using the slice-based fresnel diffraction algorithm. To suppress speckle noise of reconstructed images, sub-kinoforms for each viewing angle are calculated by adding dynamic pseudorandom initial phase factor into each object plane. The sequential kinoforms are reconstructed by a holographic reconstruction system based on phase-only LC-SLM. A specially designed cylindrical fog 3D screen is used as the scattered carrying medium to project the dynamic 3D images. Through our holographic 3D projection system, a vivid dynamic holographic reconstructed projection image can be observed by some observers at the same time.

Experimental study on phase conjecture based on two-dimensional image and carrying three-dimensional image with mist in electro-holographic reconstruction

“…In order to evaluate the qualities of reconstructed images, CC and PSNR between reconstructed images and original images are utilized. CC and PSNR [17] are defined respectively as follows: The incident illumination light which is turn into polarized and parallel light by polarizer and beam expender, respectively, is phase modulated by kinoform loading on the SLM. Fig.…”

“…The CGHs of 3D objects can be computed by numerous techniques, such as the tomographic approach [12,17], Fresnel zone approach [13], and multi-view image synthesizing approach [14]. The tomographic method often divides the 3D objects into a series of planar segments.…”

Crosstalk reduction in tabletop multiview display with fog screen

“…For example, a too large diffusing angle creates crosstalk, while too small diffusing angle leads to a dark region where the intensity declines severely between two adjacent viewpoints. Among diffusive screens, the fog screen offers an advantage in that the diffusion angle is adjustable by altering the density of the water drops [9][10][11].…”

Projection of holographic images in volumetric fluorescent fluids for near-eye displays

“…Technology is still being developed to get better image quality with lower energy consumption [5]. Recently, there has been introduced an idea of projecting images on a fog screen, [6][7][8][9] increasing the 3D effect even more. One of the natural applications for the technology is augmented reality, [10][11][12] which allows real and generated objects to be merged into one.…”