Interactive floating full-parallax digital three-dimensional light-field display based on wavefront recomposing

Abstract

Advanced three-dimensional (3D) imaging techniques can acquire high-resolution 3D biomedical and biological data, but available digital display methods show this data in restricted two dimensions. 3D light-field displays optically reconstruct realistic 3D image by carefully tailoring light fields, and a natural and comfortable 3D sense of real objects or scenes is expected. An interactive floating full-parallax 3D light-field display with all depth cues is demonstrated with 3D biomedical and biological data, which are capable of achieving high efficiency and high image quality. A compound lens-array with two pieces of lens in each lens unit is designed and fabricated to suppress the aberrations and increase the viewing angle. The optimally designed holographic functional screen is used to recompose the light distribution from the lens-array. The imaging distortion can be decreased to less than 1.9% from more than 20%. The real time interactive floating full-parallax 3D light-field image with the clear displayed depth of 30 cm can be perceived with the right geometric occlusion and smooth parallax in the viewing angle of 45°, where 9216 viewpoints are used.

High-Performance Dual-View 3-D Display System Based on Integral Imaging

“…The large-pitch lens array, including M × N plano-convex lenses, modulates the rays emitted by the pixels of the EIA and creates the perception of two different 3D scenes (e. g. point A of 3D scene 1, point B of 3D scene 2). The directional diffuser screen diffuses the rays emitted by the reconstructed 3D points with a specific diffusing angle to ensure that the observers can view consecutive 3D images [26], [27]. It locates at the given central depth plane (CDP) which is determined by the Gaussian imaging law.…”

Spatial multiplexing holographic combiner for glasses-free augmented reality

“…Tremendous progress have been made in glasses-free 3D display [1]. Among all the glasses-free 3D display technologies, autostereoscopic 3D display features thin form factor, and compressed data for video rate display [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Xinzhu Sang et al proposed a 162-inch horizontal light field display that can reconstruct 3D images within a viewing angle of 40°by an LED panel, aspheric lens array (ALA) and holographic functional screen (HFS) [21].…”

Dual-View Integral Imaging System With Wide Viewing Angle And High Spatial Resolution

“…In surgical operation scenarios, doctors can see the patient's status information during the operation, and assistants can check other information meanwhile. On the other hand, three-dimensional (3D) display which includes holographic display [7]- [10], volumetric display [11], super multi-view display [12], light field display [13], [14], and integral imaging [15]- [17] brings a vivid visual experience to the audiences, and has become an important part of the display technologies. Integral imaging, as one of the most promising 3D display technologies, has the advantages of full and smooth parallax, and visual fatigue free [18]- [21].…”