A5089755280- Advanced Optical Imaging Technologies
- Virtual Reality Applications and Impacts
- Interactive and Immersive Displays
- Augmented Reality Applications
- Advanced optical system design
- Tactile and Sensory Interactions
- Advanced Vision and Imaging
- Visual perception and processing mechanisms
- Gaze Tracking and Assistive Technology
- Optical measurement and interference techniques
- Photorefractive and Nonlinear Optics
- Image Processing Techniques and Applications
- Surgical Simulation and Training
- Adaptive optics and wavefront sensing
- Teleoperation and Haptic Systems
- Robotics and Sensor-Based Localization
- Optical Coatings and Gratings
- Minimally Invasive Surgical Techniques
- Advanced Optical Sensing Technologies
- Liquid Crystal Research Advancements
- Advanced Image and Video Retrieval Techniques
- Anatomy and Medical Technology
- CCD and CMOS Imaging Sensors
- Photonic and Optical Devices
- Electrowetting and Microfluidic Technologies
University of Arizona
2015-2024
Northeast Petroleum University
2024
Peking University
2005-2024
State Key Laboratory of Nuclear Physics and Technology
2024
Optical Sciences (United States)
2005-2023
Foundation for Research and Technology Hellas
2022
University of Crete
2022
FORTH Institute of Computer Science
2022
Advanced Institute of Industrial Technology
2022
Jiangxi Normal University
2013
An optical see-through head-mounted display (OST-HMD), which enables superposition of digital information onto the direct view physical world and maintains vision to real world, is a vital component in an augmented reality (AR) system. A key limitation state-of-the-art OST-HMD technology well-known accommodation-convergence mismatch problem caused by fact that image source most existing AR displays 2D flat surface located at fixed distance from eye. In this paper, we present innovative...
It has been a challenge to design an optical see-through head-mounted display (OST-HMD) that wide field of view (FOV) and low f-number (f/#) while maintaining compact, lightweight, nonintrusive form factor. In this paper, we present OST-HMD using wedge-shaped freeform prism cemented with lens. The prism, consisting three surfaces (FFSs), serves as the near-eye viewing optics magnifies image displayed through microdisplay, lens is auxiliary element attached in order maintain nondistorted...
This Roadmap article on three-dimensional integral imaging provides an overview of some the research activities in field imaging. The discusses various aspects including sensing 3D scenes, processing captured information, and display visualization information. paper consists a series 15 sections from experts presenting sensing, processing, displays, augmented reality, microscopy, object recognition, other applications. Each section represents vision its author to describe progress,...
We have previously developed a collaborative infrastructure called SCAPE - an acronym for Stereoscopic Collaboration in Augmented and Projective Environments that integrates the traditionally separate paradigms of virtual augmented reality. In this paper, we extend by formalizing its underlying mathematical framework detailing three Widgets constructed via framework: CoCylinder, Magnifier, CoCube. These devices promote intuitive ways selecting, examining, sharing synthetic objects,...
Conventional stereoscopic displays force an unnatural decoupling of the accommodation and convergence cues, which may contribute to various visual artifacts have adverse effects on depth perception accuracy. In this paper, we present design implementation a high-resolution optical see-through multi-focal-plane head-mounted display enabled by state-of-the-art freeform optics. The prototype system is capable rendering nearly-correct focus cues for large volume 3D space, extending into range...
We present the design and implementation of an optical see-through head-mounted display (HMD) with addressable focus cues utilizing a liquid lens. implemented monocular bench prototype capable addressing focal distance from infinity to as close 8 diopters. Two operation modes system were demonstrated: vari-focal plane mode in which accommodation cue is addressable, time-multiplexed multi-focal both retinal blur can be rendered. further performed experiments assess depth perception eye...
Developing head-mounted displays (HMDs) that offer uncompromised optical pathways to both digital and physical worlds without encumbrance discomfort confronts many grand challenges, from technological perspectives human factors. Among the minimizing visual is one of key obstacles. One contributing factors lack ability render proper focus cues in HMDs stimulate natural eye accommodation responses, which leads wellknown problem vergence-accommodation conflict. This paper provides a...
We present a concept of wide-angle, lightweight, optical see-through head-mounted display (HMD) using free-form optics tiling. Free-form tiling can potentially address several critical problems in existing tiled HMD designs that use rotationally symmetric optics. The design our achieves field view (FOV) 56° × 45° and an angular resolution 3.2 arcmin with two channels. demonstrate proof-of-concept prototype some its manufacturing details. FOV be further enlarged by more channels together at...
Depth-fused multi-focal-plane display was proposed to create a fixed-viewpoint volumetric capable of rendering correct or nearly-correct focus cues in stereoscopic through small number discretely placed focal planes. It may effectively address the negative effects conventional displays on depth perception accuracy and visual fatigue due lack cues. In this paper, we presented design assessment novel depth-fused six-focal plane prototype, nearly-accurate for range 3 diopters with high image...
A new integral-imaging-based light field augmented-reality display is proposed and implemented for the first time, to our best knowledge, achieve a wide see-through view high image quality over large depth range. By using custom-designed freeform optics incorporating tunable lens an aperture array, we demonstrated compact design of head-mounted-display that offers true 3D 30° by 18°, maintains spatial resolution 3 arc minutes across range diopters, provides 65° 40°.
One of the key issues in conventional stereoscopic displays is well-known vergence-accommodation conflict problem due to lack ability render correct focus cues for 3D scenes. Recently several light field display methods have been explored reconstruct a true scene by sampling either projections at different depths or directions rays apparently emitted and viewed from eye positions. These are potentially capable rendering nearly addressing problem. In this paper, we describe generalized...
Alvarez lenses offer accurate and high-speed, dynamic tuning of optical power through a lateral shifting two lens elements, making them an appealing solution to eliminate the inherent decoupling accommodation convergence seen in conventional stereoscopic displays. In this paper, we present design compact eyepiece coupled with lateral-shifting freeform enable compact, high-resolution, see-through head-mounted display (HMD). The proposed is able tune its focal depth from 0 3 diopters,...
Abstract Augmented and virtual reality devices are being actively investigated implemented for a wide range of medical uses. However, significant gaps in the evaluation these applications hinder their regulatory evaluation. Addressing is critical to demonstrating devices’ safety effectiveness. We outline key technical clinical challenges discussed during US Food Drug Administration’s public workshop, “Medical Extended Reality: Toward Best Evaluation Practices Virtual Reality Medicine” future...
Lack of accurate focus cues in conventional stereoscopic displays has potentially significant effects on depth perception accuracy and visual fatigue. Recently several multi-focal plane display prototypes have been demonstrated with the promise improving cue rendering displays. In this paper, we present a systematic method to address two fundamental issues designing display: (1) appropriate dioptric spacing between adjacent focal planes; (2) depth-weighted fusing function render continuous...
Most existing stereoscopic head mounted displays (HMDs), presenting a pair of images at fixed focal distance, lack the ability to correctly render naturally coupled accommodation and convergence cues. Psychophysical studies have shown that such may cause many adverse consequences as visual fatigue, diplopic vision, degraded oculomotor response, depth perception errors. In this paper, we present see-through HMD with addressable planes utilizing novel active optical element - liquid lens. The...
Increasing the depth-of-field (DOF) while maintaining high resolution imaging has been a classical challenge for conventional microscopes. Extended DOF (EDOF) is especially essential thick specimens. We present microscope capable of capturing EDOF images in single shot. A volumetric optical sampling method applied by rapidly scanning focus vari-focal objective throughout extended depths specimen within duration detector exposure. An image reconstructed deconvolving captured with response...
A head-mounted display system with fully-integrated eyetracking capability offers multi-fold benefits, not only to fundamental scientific research but also emerging applications of such technology. key limitation the state-of-the-art eyetracked (ET-HMD) technology is lack compactness and portability. In this paper, we present an innovative design a high resolution optical see-through ET-HMD based on freeform prototype demonstrated, which goggle-like compact form factor, non-obstructive field...
Free-form surfaces (FFSs) provide more freedom to design an optical system with fewer elements and hence reduce the size weight of overall than rotationally symmetric surfaces. In this paper, see-through (OST), head-mounted display (HMD) consisting a free-form, wedge-shaped prism free-form lens is designed fabricated through injection molding method. The for projection field-of-view (FOV) 36°; cemented achieve FOV 50°. are expanded at edge area during stage in order effects surface...
Head-mounted projective displays (HMPD's) are a novel type of head-mounted display. A HMPD consists miniature projection lens mounted upon the user's head and retroreflective sheeting material placed strategically in environment. First, imaging concept is reviewed its potential advantages disadvantages discussed. The design bench prototype implementation then presented. Finally, effects materials on properties optical HMPD's comprehensively investigated.
Focus cues play a significant role in three-dimensional (3-D) depth perception. Conventional stereoscopic displays, however, lack the ability to correctly render these cues, because they present pair of images on fixed image plane while forcing eyes converge at different distances view objects depths. Using fast liquid-lens device, we design and implementation time-multiplexed dual-focal display that is capable rendering correct or near-correct focus as well other such occlusion shading for...
A 3D light field display typically reconstructs a scene by sampling either the projections of at different depths or directions rays apparently emitted and viewed from eye positions. These methods are potentially capable rendering correct nearly focus cues therefore addressing well-known vergence-accommodation conflict problem plaguing conventional stereoscopic displays. However, very limited efforts have been made to investigate effects ray on quality rendered thus visual responses viewer...
Conventional display systems based on integral imaging (InI) suffer from a major tradeoff between depth of field and spatial resolution. In this Letter, new, to the best our knowledge, method for an InI-based light with extended is proposed, where digitally switchable multi-focal micro lens array can yield spanning range zero over three diopters without sacrificing either resolution or form factor. A high optical performance prototype was built demonstrated printed aperture arrays as...