Prof. Jiun-Woei Huang Profile

Prof. Jiun-Woei Huang

at National Taiwan Univ

SPIE Involvement:

Author

Publications (18)

Proceedings Article | 9 May 2024 Presentation + Paper

Adopt digital micromirror devise (DMD) for wavefront correction and wavefront sensing in adaptive optical system

Hong-Je Liu, Shu-Sheng Lee, Hsiang-Chieh Lee, Jiun-Woei Huang, Chih-Kung Lee

Proceedings Volume 12949, 129491A (2024) https://doi.org/10.1117/12.3010020

KEYWORDS: Wavefronts, Digital micromirror devices, Wavefront reconstruction, Adaptive optics, Wavefront aberrations, Shearing interferometers, Optical path differences, Wavefront sensors, Phase shifts, Phase retrieval

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Proceedings Article | 9 May 2024 Presentation + Paper

Integrating recurrent neural network (RNN) and Navier-Stokes equations for noncontact blood pressure assessment

Zheng-Yu Luo, Ting-Yu Chiang, Chen-Li Lin, Jiun-Woei Huang, Shu-Sheng Lee, Hsiang-Chieh Lee, Chih-Kung Lee

Proceedings Volume 12951, 129511S (2024) https://doi.org/10.1117/12.3010008

KEYWORDS: Blood pressure, Signal processing, Education and training, Digital signal processing

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Proceedings Article | 12 March 2024 Presentation + Paper

Geometric waveguide optimization for ghost reduction in near-eye light field display

Shan-Ling Chen, Li-Wei Fu, Jiun-Woei Huang, Kuang-Tsu Shih, Homer Chen

Proceedings Volume 12913, 129130H (2024) https://doi.org/10.1117/12.3003216

KEYWORDS: Waveguides, Reflection, Near eye displays, Mirrors, Eye, Stray light, Image quality, Visualization, Spatial resolution, Eye models

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Most near-eye displays with one fixed focal plane suffer from the vergence-accommodation conflict (VAC) and cause visual discomfort to users. In contrast, a light field display with continuous focal planes offers the most natural and comfortable AR/VR visual experiences without VAC and holds the promise to be the ultimate near-eye 3-D display. It projects light rays onto human retina as if the light rays were emanated from a real object. This paper considers a near-eye light field display comprising a light field generator, a collimator, and a geometric waveguide as the three main components. It takes 4-D light field data in the form of an array of 2-D subview images as input and generates a light field as output. The light field generator is the device responsible for converting the light emitted from the display panel to the light representing the light field of a virtual scene. The geometric waveguide along with a collimator ensures that the light rays propagating in the waveguide are collimated. The partially reflective mirrors of the waveguide replicate the optical path to achieve exit pupil expansion (EPE) and a large eyebox. However, existing waveguide eyepieces for near-eye AR/VR displays are not designed for, and hence may not fit light field displays. In this work, we look into a geometric waveguide for light field display and find that the light fields replicated by the partially reflective mirrors cannot perfectly overlap on the user’s retina, resulting in the appearance of multiple repetitive images—a phenomenon we call “ghost artifact”. This paper delves into the cause of this artifact and develops a solution for applications that require short-range interaction with virtual objects, such as surgical procedures. We define a working range devoid of noticeable ghost artifact based on the angular resolution characteristics of human eye and optimize the orientation of an array of partially reflective mirrors of the waveguide to meet the image quality requirement for short-range interaction. With the optimized waveguide, the ghost artifact is significantly reduced. More results of the optimized waveguide will be shown at the conference.

Proceedings Article | 16 March 2023 Presentation + Paper

A novel birdbath eyepiece for light field AR glasses

Chao-Chien Wu, Kuang-Tsu Shih, Jiun-Woei Huang, Homer H. Chen

Proceedings Volume 12449, 124490N (2023) https://doi.org/10.1117/12.2647315

KEYWORDS: Augmented reality, Glasses, Near eye displays, Design and modelling, Eye

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Natural and comfortable visual experience is critical to the success of metaverse, which has recently drawn worldwide attention. However, due to the vergence-accommodation conflict (VAC), most augmented reality (AR) or virtual reality (VR) displays on the market today can easily cause visual discomfort or eyestrain to users. Being able to resolve the VAC, light field display is commonly believed to be the ultimate display for metaverse. Similar to conventional near-eye AR displays, a near-eye light field AR display consists of three basic components: light source, projection unit, and eyepiece. Although the same light source can be used in both kinds of displays, the projection unit and the eyepiece of a near-eye light field AR display call for a new design to preserve the structure of light field when it reaches user’s retina. The primary focus of this paper is on the eyepiece design for a near-eye light field AR display. In consideration of the compact form factor and wide field of view, the birdbath architecture, which consists of a beam splitter and a combiner, is selected as the basis of our eyepiece design. We optimize the birdbath eyepiece for the light field projection module produced by PetaRay Inc. The birdbath eyepiece receives the light field emitted from the light field projection module and projects it fully into the user’s eye. Our design preserves the structure of light field and hence allows virtual objects at different depths to be properly perceived. In addition, the eyepiece design leads to a compact form factor for the near-eye light field AR display. Specifically, our eyepiece is designed by optimizing the tradeoff between the eyebox and the depth of focus (DOF) of the near-eye light field AR display. The resulting DOF allows the user to have a clear and sharp perception of any virtual object in the working range, which is from 30 cm to infinity. In addition, we optimize the entrance pupil position and the F-number of the eyepiece according to the exit pupil position and the divergence angle of the light field projection module. This way, the eyepiece is able to preserve the structure of light field, meaning that the angular relation between light rays coming from the same object point in space is preserved. To demonstrate the performance of our birdbath eyepiece, we use the Human Eye Model-Liou & Brennan (JOSA A 08/97) to simulate the image formation process.

Proceedings Article | 6 March 2023 Presentation + Paper

Continuous blood pressure monitoring from an autonomic nervous system perspective

Ting-Yu Chiang, Shih-Lun Tai, Yu-Ting Liu, Jiun-Woei Huang, Shu-Sheng Lee, Hsiang-Chieh Lee, Chih-Kung Lee

Proceedings Volume 12375, 1237502 (2023) https://doi.org/10.1117/12.2647821

KEYWORDS: Blood pressure, Blood, Nervous system, Data modeling, Blood vessels, Sensors, Physiology

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SPIE Journal Paper | 4 May 2021 Open Access

Programmable ultraviolet light-emitting diode array with a transfer lens as light-field adjustable source

Jiun-Woei Huang

OE, Vol. 60, Issue 09, 091502, (May 2021) https://doi.org/10.1117/12.10.1117/1.OE.60.9.091502

KEYWORDS: Semiconducting wafers, Photomasks, Ultraviolet light emitting diodes, Lithography, Optical engineering, Light sources, Light, Lens design, Computer programming, Wavefronts

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Proceedings Article | 22 February 2021 Poster + Paper

Design ULVLED stepper with programmable reflective display panel as mask for multiple process wafer

Jiun-Woei Huang, Chih-Kung Lee

Proceedings Volume 11613, 116130Q (2021) https://doi.org/10.1117/12.2583817

KEYWORDS: Photomasks, Lithography, Liquid crystal on silicon, Semiconducting wafers, Sensors, Silicon, Modulation transfer functions, Crystals, Light sources, Binary data

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Proceedings Article | 21 August 2020 Presentation + Paper

Light field displays for near eye VR and AR

Jiun-Woei Huang

Proceedings Volume 11482, 114820C (2020) https://doi.org/10.1117/12.2568379

KEYWORDS: Eye, Virtual reality, Cameras, Projection systems, Eye models, Modulation transfer functions, Retina, Optical design, Imaging arrays, 3D displays

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Proceedings Article | 23 March 2020 Paper

Design and fabrication of UVLED array aligner for proximity and soft contact exposure

Jiun-Woei Huang

Proceedings Volume 11327, 113270Z (2020) https://doi.org/10.1117/12.2551568

KEYWORDS: Photomasks, Semiconducting wafers, Wafer-level optics, Lithography, Lithographic illumination, Collimation, Geometrical optics, Photoresist materials, Optical design, Light sources

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Proceedings Article | 30 August 2019 Presentation + Paper

The design of a four-mirror anti-astigmatism astronomical telescope

Jiun-Woei Huang

Proceedings Volume 11104, 111040E (2019) https://doi.org/10.1117/12.2529905

KEYWORDS: Mirrors, Telescopes, Optical instrument design, Relays, Sensors, Satellites, Astronomical telescopes, Objectives, Reflectivity, Reflector telescopes

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Proceedings Article | 20 March 2019 Paper

A programmable UVLED array with a collimated optics as transform lens as light field adjustable source

Jiun-Woei Huang

Proceedings Volume 10961, 109610T (2019) https://doi.org/10.1117/12.2514010

KEYWORDS: Photomasks, Collimation, Light, Light sources, Lithography, Wavefronts, Point spread functions, Near field optics, Semiconducting wafers, Lens design

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Proceedings Article | 20 March 2018 Paper

The optical design of 3D ICs for smartphone and optro-electronics sensing module

Jiun-Woei Huang

Proceedings Volume 10587, 1058717 (2018) https://doi.org/10.1117/12.2297335

KEYWORDS: Ultraviolet radiation, Reflectivity, Cameras, UV optics, Sensors, Glasses, Integrated optics, Optical design, Semiconducting wafers, Signal processing

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Proceedings Article | 20 March 2018 Presentation + Paper

The illumination design of UV LED array for lithography

Jiun-Woei Huang

Proceedings Volume 10587, 105870Z (2018) https://doi.org/10.1117/12.2297170

KEYWORDS: Lithography, Light sources, Light, Lithographic illumination, Optical design, Mercury, Ultraviolet light emitting diodes, Photomasks, Ultraviolet radiation, Diodes

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Proceedings Article | 20 March 2018 Paper

The partial coherence modulation transfer function in testing lithography lens

Jiun-Woei Huang

Proceedings Volume 10587, 105871D (2018) https://doi.org/10.1117/12.2297165

KEYWORDS: Modulation transfer functions, Lithography, Light sources, Photomasks, Modulation, Coherence (optics), Phase shift keying, Semiconducting wafers, Lithographic illumination, Spatial frequencies

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SPIE Journal Paper | 22 May 2017 Open Access

Optical design of ultrashort throw liquid crystal on silicon projection system

Jiun-Woei Huang

OE, Vol. 56, Issue 05, 051408, (May 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.5.051408

KEYWORDS: Projection systems, Liquid crystal on silicon, Optical design, Image enhancement, Virtual reality, Heads up displays, Aspheric optics, Mirrors, Image resolution, Resolution enhancement technologies

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Proceedings Article | 29 March 2017 Paper

The ultra-violet partial coherence modulation transfer function for lithography

Jiun-Woei Huang

Proceedings Volume 10147, 101471L (2017) https://doi.org/10.1117/12.2257941

KEYWORDS: Modulation transfer functions, Lithography, Ultraviolet radiation, Diffraction, Semiconductors, Electronic components, Modulation, Light sources, Coherence (optics), Optical design, Photomasks, Polarization, Phase shift keying

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Proceedings Article | 17 July 2015 Paper

The design and fabrication of common optical components lithography lens

Jiun-Woei Huang

Proceedings Volume 9524, 95240P (2015) https://doi.org/10.1117/12.2186932

KEYWORDS: Lens design, Aspheric lenses, Modulation transfer functions, Lithography, Optical components, Mirrors, Tolerancing, Assembly tolerances, Diffraction, Optical mounts

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Proceedings Article | 17 July 2015 Paper

The optical design of ultra-short throw system for panel emitted theater video system

Jiun-Woei Huang

Proceedings Volume 9524, 952418 (2015) https://doi.org/10.1117/12.2189417

KEYWORDS: Liquid crystal on silicon, Mirrors, Projection systems, Distortion, Reflectivity, LCDs, Optical design, Video, Light sources, Modulation transfer functions

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Showing 5 of 18 publications

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