Enhancing layered 3D displays with a lens

Abstract

We augment layered three-dimensional (3D) displays using a lens placed in front of or between attenuation layers. The lens, or similar optical element, improves the angular resolution of the system and enables translation of the displayed scene from a near-field image to a far-field projection. We analyze the relation between angular resolution (scene depth) and the number of layers and characterize the phase-space trade-offs between spatial and angular frequency components. We also introduce an algorithm for determining the layers of the display, which significantly reduces the computational requirements. The method is demonstrated on a standard 4D light field scene.

Signal-to-noise properties of correlation plenoptic imaging with chaotic light

“…Although the first feasible proposal to apply plenoptic imaging to digital cameras dates back to the mid-2000s [2], the seminal intuition can be attributed to Lippmann [3] one century earlier. Plenoptic imaging is currently employed in a very wide range of applications, that include stereoscopy [1, 4,5], microscopy [6][7][8][9], particle image velocimetry [10], particle tracking and sizing [11], and wavefront sensing [12][13][14][15]. Since plenoptic devices are able to simultaneously acquire 2D images from multiple perspectives, they are considered among the fastest and most promising methods for 3D imaging [16], as shown by the very recent use in imaging of animal neuronal activity [9], surgical robotics [17], endoscopy [18] and blood-flow visualization [19].…”

Correlation Plenoptic Imaging With Entangled Photons

“…that is obtained from the general expression (10), when the focusing condition in Equation (11) holds.…”

“…From Equation (10), one can infer that a point on the source corresponds to a spot of width ∆ρ b ∼Mcz b /(Ωd) on the sensor S b , with d the smallest length scale of the aperture function of the object. Thus, as far as the pixel sizes lie above the resolution limits, the spatial and angular resolution are decoupled.…”

Exploring plenoptic properties of correlation imaging with chaotic light

“…Though the intuition of plenoptic imaging goes back in 1908 [1], the first feasible proposal of realization of a light field camera came in much more recent times [2]. Plenoptic imaging was employed for the first time in enhanced digital cameras [3,4], and currently has a wide range of scientific applications, that include stereoscopy [2,5,6], microscopy [7][8][9][10], velocimetry [11], tracking and sizing of particles [12], wavefront sensing [13,14,16,17]. One of the most relevant features of plenoptic imaging is the simultaneous acquisition of multi-perspective 2D images, which enable a fast reconstruction of the 3D scene [18].…”