Schematic of factored near eye light field display. Two stacked, transparent liquid crystal displays modulate the uniform backlight in a multiplicative fashion. When observed through a pair of lenses, the display provides focus cues in addition to binocular disparity afforded by conventional VR displays.
Photographs of the prototype when focusing on virtual objects located on the front and rear panels as well as in between. The proposed rank-1 light field factorization provides high-quality imagery even for virtual objects that are not located on the physical panels. (3D scene courtesy of Bushmills Irish Whiskey)
Prototype I. These is a photograph of our first light field stereoscope prototype. The housing is 3D-printed and based on Adafruit’s 3D-printed Video Goggles (https://learn.adafruit.com/3d-printed-wearable-video-goggles/overview). You can download our .stl files in the technical paper supplement above and print it yourself. The LCD panels and lenses are ordered from ebay. Details on those can be found in the technical paper.
Prototype II. Different perspectives of our second prototype light field stereoscope. More details on individual parts can be found in the technical paper. The .stl files for the housing are included in the technical paper supplement, so you can 3D print it yourself.
Prototype III. This is the third-generation prototype that Fu-Chung designed and fabricated at NVIDIA Research. We will be demonstrating this prototype at ACM SIGGRAPH 2015 Emerging Technologies in collaboration with NVIDIA.
Technical illustration of the proposed near-eye light field display system. Two attenuating spatial light modulators (SLMs), such as liquid crystal displays, are mounted inside the physical device (right, black outline). The cascaded SLMs modulate the backlight (not shown) in a multiplicative manner. When observed through a magnifying lens, virtual and magnified images of the SLMs are created – one close to optical infinity and the other close to the observer. The viewing frustra used for rendering computer-generated content are vertically symmetric but horizontally asymmetric, as illustrated in the bottom.
Overview of closely-related, focus-supporting display technologies. The light field stereoscope is the first device offering high image resolution and focus cues in a small form factor. The asterisk indicates diffraction limits.
Left view of reconstructed light fields showing a scene with bright and dark objects in background and foreground, respectively. Additive multi-focal-plane displays cannot accurately reproduce monocular occlusions in this case (top row), because the bright light emitted by farther objects always shines through the darker ones in the foreground. Multiplicative layers accurately reproduce occlusions over the eye box (bottom row), thereby providing a better approximation of retinal blur for complex scenes. (3D scene courtesy of Paul H. Manning)
Front and rear focus of a stereo light field photographed with a Lytro Illum and displayed on a light field stereoscope. Additional results showing captured, factored, and displayed stereo light fields can be found in the technical paper supplement.