Projection-Type Integral Imaging Using a Pico-projector

Yang, Yucheol; Min, Sung−Wook

doi:10.3807/josk.2014.18.6.714

Journal of the Optical Society of Korea

2014

DOI: 10.3807/josk.2014.18.6.714

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Projection-Type Integral Imaging Using a Pico-projector

Yucheol Yang

Sung−Wook Min

Abstract: A pico-projector is a compact and mobile projector that has an infinite focus. We apply the pico-projector to a projection-type integral imaging system, which can expand the image depth to form multiple central depth planes. In a projection-type integral imaging system, the image flipping problem arises because the expanded elemental images pass through a lens array. To solve this problem, we propose the ray tracing of a pico-projector at a central depth plane and compensate the elemental image using a pixel-m… Show more

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Cited by 3 publications

References 17 publications

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Illumination optics design for DMD Pico-projectors based on generalized functional method and microlens array

Zhang

Zhu³

2019

J. Eur. Opt. Soc.-Rapid Publ.

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The influence of incident angle and aberration of the microlens array on the optical efficiency in pico-projector is analyzed. By modifying the relevant parameters, a method to optimize the optical efficiency and uniformity of the illumination system is proposed. By changing the profile of the freeform double lens used for the concentrator of LED source, the incident angle can be reduced, thus the efficiency loss caused by large angle incident can be reduced. In addition, two spherical relay lenses instead of the Fourier lenses are used as integral component after the microlens array, which is not only low cost, but also more flexible in controlling aberrations. After system optimization, the illumination efficiency and uniformity of the pico-projector system can reach 60.51% and 86.2%, which verifies the feasibility and validity of the theoretical analysis.

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Illumination optics design for DMD Pico-projectors based on generalized functional method and microlens array

Zhang

Zhu³

2019

J. Eur. Opt. Soc.-Rapid Publ.

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Projection-type integral imaging system using a three-dimensional screen composed of a lens array and a retroreflector film

2017

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We propose an improved projection-type integral imaging system using a three-dimensional (3D) screen consisting of a lens array and a retroreflector film in this paper. The projection-type integral imaging system suffers from the disadvantage of low-visibility images because of the inherently small exit pupil size of the projector. In order to resolve this problem, we adopt a 3D screen to avoid the demerits of a diffuser screen, such as off-screen image blur and loss of parallax. To determine the appropriate configuration of the 3D screen in the system, a simulation based on a ray transfer matrix analysis method was performed. The results show that the 3D screen should be located near the central depth plane of the integral imaging system, which leads to the conclusion that only the real mode is available for the proposed system. Experiments to verify this configuration and the feasibility of the proposed system were conducted using a system constructed with a real mode integral imaging system including a convex mirror array, which can fundamentally eliminate the pseudoscopic problem.

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Integral imaging microscopy with enhanced depth-of-field using a spatial multiplexing

Erdenebat¹,

Alam²,

Lim³

et al. 2016

Opt. Express

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A depth-of-field enhancement method for integral imaging microscopy system using a spatial multiplexing structure consisting of a beamsplitter with dual video channels and micro lens arrays is proposed. A computational integral imaging reconstruction algorithm generates two sets of depth-sliced images for the acquired depth information of the captured elemental image arrays and the well-focused depth-slices of both image sets are combined where each is focused on a different depth plane of the specimen. A prototype is implemented, and the experimental results demonstrate that the depth-of-field of the reconstructed images in the proposed integral imaging microscopy is significantly increased compared with conventional integral imaging microscopy systems.

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Projection-Type Integral Imaging Using a Pico-projector

Cited by 3 publications

References 17 publications

Illumination optics design for DMD Pico-projectors based on generalized functional method and microlens array

Illumination optics design for DMD Pico-projectors based on generalized functional method and microlens array

Projection-type integral imaging system using a three-dimensional screen composed of a lens array and a retroreflector film

Integral imaging microscopy with enhanced depth-of-field using a spatial multiplexing

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