Enhanced field-of-view integral imaging display using multi-Köhler illumination

Abstract

A common drawback in 3D integral imaging displays is the appearance of pseudoimages beyond the viewing angle. These pseudoimages appear when the light rays coming from each elemental image are not passing through the corresponding microlens, and a set of barriers must be used to avoid this flipping effect. We present a pure optical arrangement based on Köhler illumination to generate these barriers thus avoiding the pseudoimages. The proposed system does not use additional lenses to project the elemental images, so no optical aberrations are introduced. As an added benefit, Köhler illumination provides a higher contrast 3D display.

Breakthroughs in Photonics 2014: Recent Advances in 3-D Integral Imaging Sensing and Display

“…We have reviewed the main limitations of integral imaging and also the main recent advances. We conclude that while integral imaging requires more technological maturity for mass production, the outlook is very promising for a prominent role in the 3-D field, including healthcare applications [39]- [41], [51], and security and surveillance applications [52]. Additional review material can be found in [53] and [54].…”

“…Among the advances it is remarkable the design of methods for production of orthoscopic images [37], [38]. Also important advances have been achieved in the purpose of increasing the viewing angle [39]- [41]. An interesting issue that has been faced satisfactorily is the design of an algorithm that permits, from a captured collection of elemental images, to design the collection of microimages ready to be projected on the integral-imaging monitor.…”

Super multi-view near-eye 3D display with enlarged field of view

“…As a typical light-field display technology, the integral imaging can offer consistent convergence distance and focusing distance. [24][25][26][27][28][29][30] Aided by freeform optics, the enlarged 3D scene presented by an integral imaging unit can be guided to the eye of the user in a near-eye 3D display system. 31 Researchers tried various methods on performance enhancement.…”

Continuous combination of viewing zones in integral three-dimensional display using multiple projectors

“…[12][13][14][15][16][17][18][19][20] Martínez-Cuenca et al 12 proposed a method that enhances the viewing angle using a multiaxis telecentric relay system that prevents the overlapping between elemental images in the pickup and the flipping in the display. Takaki and Nago 13 and Kawakita et al 14 proposed a method that increases the number of viewpoints at which 3-D images can be seen using multiple display devices, but they have motion parallax only in the horizontal direction.…”

“…Liao et al 15 and Jang et al 16 increased the number of pixels in integral 3-D images using multiple projectors, but the viewing zone remains narrow since it has not been enlarged. Tolosa et al 17 presented a technique to improve the field of view by eliminating the flipping effect of the conventional integral displays using a system based on Köhler illumination, which is composed of a collimating lens and two lens arrays. Alam et al 18 proposed a technique to combine the viewing zones of two projectors by time division, but it suffers from a reduction in the frame rate and a limitation on the number of devices.…”