Integral imaging is a promising three-dimensional (3D) technique that captures and reconstructs light field information. Microlens arrays are usually used for the reconstruction process to display 3D scenes viewer. However, inherent chromatic aberration of microlens array reduces viewing quality, thus, broadband achromatic remains challenge integral imaging. Here, we realize silicon nitride metalens in visible region can be reconstruct optical white light. The contains 60 ×...

An integral imaging-based 2D/3D convertible display system is proposed by using a lens-array holographic optical element (LAHOE), polymer dispersed liquid crystal (PDLC) film, and projector. The LAHOE closely attached to the PDLC film constitute projection screen. used realize imaging 3D display. When with an applied voltage in transparent state, projector projects Bragg matched image, works mode. without scattering 2D A prototype of developed, it provides images properly.

Light field 3D display technology is considered a revolutionary to address the critical visual fatigue issues in existing displays. Tabletop light provides brand-new form that satisfies multi-user shared viewing and collaborative works, it poised become potential alternative traditional wall portable forms. However, large radial angle correct perspective parallax are still out of reach for most current tabletop displays due limited amount spatial information. To issues, novel integral...

Abstract As a frontier technology, holography has important research values in fields such as bio-micrographic imaging, light field modulation and data storage. However, the real-time acquisition of 3D scenes high-fidelity reconstruction technology not yet made breakthrough, which seriously hindered development holography. Here, novel holographic camera is proposed to solve above inherent problems completely. The consists end calculation end. At camera, specially configured liquid materials...

An autostereoscopic display based on two-layer lenticular lenses is proposed. The include one-layer conventional and additional concentrating-light lenses. Two prototypes of the proposed displays are developed. At optimum three-dimensional view distance, luminance distribution along horizontal direction measured. By calculating distribution, crosstalk obtained. Compared with display, has less crosstalk, a wider angle, higher efficiency light utilization.

We report a zoom microscope objective which can achieve continuous change and correct the aberrations dynamically. The consists of three electrowetting liquid lenses two glass lenses. magnification is changed by applying voltages on Besides, play role to aberrations. A digital based proposed demonstrated. analyzed properties objective. In contrast conventional objectives, be tuned from ~7.8 × ~13.2 continuously. For our objective, working distance fixed, means no movement parts are needed...

Holographic 3D display technology is a kind of naked-eye that can realize the undifferentiated fusion virtual reconstructed image and real scene without causing visual fatigue in viewers. However, constrained by narrow viewing angle, small size, serious speckle noise, progress current holographic hampered. In this paper, high-quality system based on splicing spatial light modulators (SLMs) proposed. By using temporal division multiplexing method two specially tailored beam deflection...

We propose a large viewing angle integral imaging 3D display system based on symmetrical compound lens array (SCLA). The comprises high-resolution 2D panel, an SCLA, and light shaping diffuser. panel presents elemental image array, the SCLA modulates rays emitted from to form images in space, diffuser eliminates gaps between pixels of images. find that lateral aberration is crucial factor affects resolution reconstructed image. structure enables reduced focal length elimination aberration,...

We propose an optical switch based on the electrowetting effect. A transparent oil and a dye-doped water fill cell. The two liquids are immiscible form curved interface. pillar-shaped platform with round dome is fixed substrate. of submerged in water. As result, light highly absorbed by covered When shape changed, can touch due to Then channel which pass through incident light. Our results show that system obtain high attenuation (∼928:1) reasonable response time (∼47 ms). diameter aperture...

A liquid crystal (LC) lens array with high light control power and a large aperture using composited alignment layer is proposed. In our design, the not only used for getting uniform arrangement of LC molecule, but also lens-like refractive index distribution in when voltage applied. Through simple technology processes, tunable focal length millimeter scale diameter can be achieved. Furthermore, maximum phase difference proposed achieve 105.38π. So, has power.

We report an annular folded electrowetting liquid lens. The front surface of the lens is coated with a circular reflection film, while back ring-shaped film. This approach allows to get optical power from liquid-liquid interface three times so that tripled. An analysis properties presented along design, fabrication, and testing prototype. Our results show proposed can be enhanced ∼20.1 ∼50.2 m(-1) in comparison conventional (aperture ∼3.9 mm). It reduce operating voltage by ∼10 V reach same...

We report a tunable iris using two immiscible liquids. One liquid is opaque and conductive, while the other clear insulating. The forms an iris-like opening in its central area on one glass substrate surface. used to fill outside space of liquid. In voltage-off state, presents smallest aperture. When voltage applied liquids, diameter enlarged due electrowetting effect. Our results show that aperture can be tuned from ~2.3 ~6.1 mm as changed 0 ~65 V. response time transmittance were measured...

We propose a cross-talk-free integral imaging 3D display based on pyramid pinhole array. The array is used to provide point light source Since the generated behind transmission-type panel that displays an elemental image array, pseudoscopic problem can be resolved. By setting appropriate parameters for cross talk eliminated. experimentally verify reconstruction of orthoscopic and images using proposed display.

We report an ultrathin zoom telescopic objective that can achieve continuous change and has reduced compact volume. The consists of annular folded lens three electrowetting liquid lenses. undertakes the main part focal power system. Due to a multiple-fold design, optical path is in with thickness ~1.98mm. lenses constitute part. Based on proposed objective, camera demonstrated. analyze properties objective. aperture ~15mm. total length system ~18mm tunable ~48mm ~65mm. Compared conventional...

In this paper, we propose a dual-view-zone tabletop 3D display system based on integral imaging by using multiplexed holographic optical element (MHOE) that has the properties of two sets microlens arrays. The MHOE is recorded reference beam single-exposure method. records wavefronts array from different directions. Thus, when projected MHOE, with directions will be rebuilt and virtual images can reconstructed in viewing zones. angle wavelength selectivity. Under conditions matched beam,...

Abstract Tabletop three‐dimensional (3D) display is an attractive technology that allows multiple individuals around the table to view reconstructed 3D objects simultaneously, which can be applied a variety of application scenarios such as desktop conference and board games. In this review paper, tabletop true has been characterized classified into four categories based on technologies light field display, integral imaging, volumetric holographic displays. Moreover, comparisons these are...

A fast responsive two-dimensional/three-dimensional (2D/3D) switchable display is demonstrated based on an active liquid crystal (LC) microlens array and a twisted nematic (TN) cell. Compared with the traditional LC array, fabricated has more ideal phase profile better focusing effect. The TN cell can switch polarization direction of incident light very short switching time (4.3 ms) small driving voltage (5Vrms). By introducing tilted elemental image arrays lens moiré patterns are...

In this paper, a liquid crystal axicon based holographic near-eye display system with large viewing area is proposed. The of the extended by implementing axicon. error diffusion algorithm used to calculate computer-generated hologram (CGH). When incident on placed at back focal plane Fourier lens, reconstruction light modulated CGH deflected into two directions resulting in extension. Meanwhile, illustrate potential proposed system, two-dimensional extension demonstrated. It combines...

We propose a liquid prism based on electrowetting for wide-angle beam tracking and steering. Two transparent cubic cells which are filled with two immiscible liquids stacked together to form the device. The function as optical prisms. Via eletrowetting, we successfully control liquid–liquid interface by changing applied voltage opposite sidewalls. device is capable of experiment shows that can deflect steer light through an angle ∼19.9 deg (+10.4 −9.5 deg), total response time ∼202 ms....

In this paper, we analyze the relationship between viewer and viewing zones of integral imaging (II) system present a partially-overlapped zone (POVZ) based with super wide angle. proposed system, angle can be wider than conventional tracking II system. addition, POVZ eliminate flipping time delay 3D scene as well. The has 120° without effect about twice one.

We propose an adaptive nematic liquid crystal (LC) lens array using a dielectric layer with low constant as resistive layer. With the and periodic-arranged iridium tin oxide (ITO) electrodes, vertical electric field across LC varies linearly over aperture is obtained in voltage-on state. As result, centrosymmetric gradient refractive index profile within generated, which causes focusing behaviour. result of optimisation, thin cell gap greatly reduces switching time can be achieved our...

We propose an optical method to eliminate pseudoscopic issue in the integral imaging three-dimensional (3D) display by using a transmissive mirror device (TMD) and light filter. Object rays passing through TMD can form undistorted depth inverted real image. Therefore, existing traditional imaging. However, two ghost images appeared TMD. After studying causes of images, filter is designed fabricated images. Integral developed, it presents high quality 3D image without issue.