Dr. Yun-Woo Lee Profile

Dr. Yun-Woo Lee

Principal Research Scientist at Korea Research Institute of Standards and Science

SPIE Involvement:

Author

Publications (62)

Proceedings Article | 4 October 2023 Presentation + Paper

Phase retrieval by pattern classification and circular mean for robust optical testing

Ohgan Kim, Yun-woo Lee, Ho-Soon Yang

Proceedings Volume 12677, 1267707 (2023) https://doi.org/10.1117/12.2677804

KEYWORDS: Mirror surfaces, Image classification, Phase unwrapping, Phase retrieval, Optical testing, Vibration, Turbulence

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Proceedings Article | 4 October 2023 Presentation + Paper

Full-aperture wavefront reconstruction method in quadri-wave lateral shearing interferometry (QWLSI)

In-Ung Song, Ho-Soon Yang, Yun-Woo Lee

Proceedings Volume 12672, 126720E (2023) https://doi.org/10.1117/12.2677170

KEYWORDS: Wavefronts, Wavefront reconstruction, Reconstruction algorithms, Interferograms, Interferometry, Wavefront errors, Optical testing, Mirrors

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Proceedings Article | 30 August 2019 Paper

Design and development of large SiC mirror for spaceborne application

Il Kweon Moon, Ho-Soon Yang, Yun Woo Lee

Proceedings Volume 11100, 111000J (2019) https://doi.org/10.1117/12.2529058

KEYWORDS: Mirrors, Silicon carbide, Optics manufacturing, Manufacturing, Standards development, Optical fabrication, Thermography, Finite element methods, Polishing, Stress analysis

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Proceedings Article | 16 October 2017 Paper

Dual-line fabrication method in direct laser lithography to reduce the manufacturing time of diffractive optics elements

Young-Gwang Kim, Hyug-Gyo Rhee, Young-Sik Ghim, Ho-Soon Yang, Yun-Woo Lee

Proceedings Volume 10451, 104511R (2017) https://doi.org/10.1117/12.2280620

KEYWORDS: Lithography, Optics manufacturing, Optical components, Thermography, Manufacturing, Diffractive optical elements, Polonium, Laser ablation, Photomasks

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Proceedings Article | 2 September 2015 Paper

Development of 1-m primary mirror for a spaceborne camera

Hagyong Kihm, Ho-Soon Yang, Hyug-Gyo Rhee, Yun-Woo Lee

Proceedings Volume 9573, 95730W (2015) https://doi.org/10.1117/12.2187760

KEYWORDS: Mirrors, Adhesives, Lightweight mirrors, Space mirrors, Finite element methods, Distortion, Safety, Cameras, Space telescopes, Astronomical imaging

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Proceedings Article | 17 October 2012 Paper

Computer-aided alignment method using RMS WFE value as an optimization criterion

Yunjong Kim, Ho-Soon Yang, Yun-Woo Lee

Proceedings Volume 8491, 84910J (2012) https://doi.org/10.1117/12.928896

KEYWORDS: Optical alignment, Mirrors, Optical components, Spherical lenses, Infrared imaging, Infrared telescopes, Optimization (mathematics), Wavefronts, Lenses, Zernike polynomials

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Proceedings Article | 16 October 2012 Paper

Eight-axis-polishing machine for 2 m off-axis aspheric optics

Hyug-Gyo Rhee, Ho-Soon Yang, Il-Kweon Moon, Hagyong Kihm, Jae-Hyub Lee, Young-sik Ghim, Yun-Woo Lee

Proceedings Volume 8416, 84161K (2012) https://doi.org/10.1117/12.2009381

KEYWORDS: Polishing equipment, Interferometers, Aspheric optics, Calibration, Mirrors, Polishing, Optical fabrication, Heterodyning, Optical encoders, Finite element methods

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Proceedings Article | 16 October 2012 Paper

Ultra-precision surface polishing using ion beam figuring

Young-Sik Ghim, Shin-Jae You, Hyug-Gyo Rhee, Ho-Soon Yang, Yun-Woo Lee

Proceedings Volume 8416, 84161O (2012) https://doi.org/10.1117/12.973725

KEYWORDS: Ion beams, Surface finishing, Polishing, Ion beam finishing, Sputter deposition, Optical simulations, Surface roughness, Ions, Chemical species, Polyurethane

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Proceedings Article | 15 October 2012 Paper

1-m lightweight mirror design using genetic algorithm

Hagyong Kihm, Il Kweon Moon, Ho-Soon Yang, Yun-Woo Lee

Proceedings Volume 8415, 841514 (2012) https://doi.org/10.1117/12.2002566

KEYWORDS: Mirrors, Lightweight mirrors, Finite element methods, Genetic algorithms, Space mirrors, Glasses, Space telescopes, Astronomical imaging, Optical design, Mirror mounts

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Proceedings Article | 27 September 2012 Paper

Design and development of a wide field telescope

Il Moon, Sangon Lee, Juhee Lim, Ho-Soon Yang, Hyug-Gyo Rhee, Jae Bong Song, Yun Woo Lee, Jong Ung Lee, Ho Jin

Proceedings Volume 8444, 844448 (2012) https://doi.org/10.1117/12.926647

KEYWORDS: Telescopes, Mirrors, Space telescopes, Optical instrument design, Lenses, Finite element methods, CCD cameras, Image analysis, Motion analysis, Optical design

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Proceedings Article | 24 September 2011 Paper

Lens mount with ring-flexures for athermalization

Hagyong Kihm, Ho-Soon Yang, Yun-Woo Lee, Jong-Ung Lee

Proceedings Volume 8125, 81250P (2011) https://doi.org/10.1117/12.892051

KEYWORDS: Adhesives, Thermography, Finite element methods, Birefringence, Photovoltaics, Interferometers, Optical mounts, Interferometry, Silica, Optics manufacturing

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Proceedings Article | 14 September 2011 Paper

Absolute thickness measurement of silicon wafer using wavelength scanning interferometer

Young-Sik Ghim, Amit Suratkar, Angela Davies, Yun-Woo Lee

Proceedings Volume 8133, 813312 (2011) https://doi.org/10.1117/12.898354

KEYWORDS: Semiconducting wafers, Interferometry, Silicon, Wafer-level optics, Charge-coupled devices, Reflectivity, Interferometers, Reflectometry, Refractive index, Error analysis

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Proceedings Article | 3 August 2010 Paper

Polarized point diffraction interferometer for fringe stabilization

Hagyong Kihm, Yun-Woo Lee

Proceedings Volume 7790, 779013 (2010) https://doi.org/10.1117/12.859805

KEYWORDS: Optical testing, Interferometers, Polarization, Polarizers, Point diffraction interferometers, Optical alignment, Diffraction, Optical analysis, Imaging systems, Modulation transfer functions

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Proceedings Article | 22 August 2009 Paper

Alignment of off-axis optical system with multi mirrors using derivative of Zernike polynomial coefficient

Yunjong Kim, Ho-Soon Yang, Sug-Whan Kim, Yun-Woo Lee

Proceedings Volume 7433, 74330C (2009) https://doi.org/10.1117/12.825826

KEYWORDS: Optical alignment, Wavefronts, Telescopes, Zernike polynomials, Optical components, Error analysis, Mirrors, Interferometry, Device simulation, Off axis mirrors

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Proceedings Article | 22 August 2009 Paper

Modified alignment CGHs for aspheric surface test

Jae-Bong Song, Ho-Soon Yang, Hyug-Gyo Rhee, Yun-Woo Lee

Proceedings Volume 7426, 742616 (2009) https://doi.org/10.1117/12.826659

KEYWORDS: Computer generated holography, Aspheric lenses, Optical alignment, Diffraction, Eye, Optical testing, Mirrors, Spatial frequencies, Wavefronts, Interferometers

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Proceedings Article | 22 August 2009 Paper

High-speed and precision auto-focusing system for direct laser lithography

Dong-Ik Kim, Hyug-Gyo Rhee, Jae-Bong Song, Yun-Woo Lee

Proceedings Volume 7426, 742610 (2009) https://doi.org/10.1117/12.825191

KEYWORDS: Lithography, Laser systems engineering, Laser vision correction, Cylindrical lenses, Objectives, Ferroelectric materials, Actuators, Control systems, Semiconductor lasers, Inspection

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Proceedings Article | 22 August 2009 Paper

Fabrication of 300-mm silicon reference wafer by using direct laser writer

Hyug-Gyo Rhee, Dong-Ik Kim, Seung-Ki Hong, Jae-Bong Song, Yun-Woo Lee

Proceedings Volume 7426, 742612 (2009) https://doi.org/10.1117/12.824846

KEYWORDS: Semiconducting wafers, Silicon, Chromium, Infrared radiation, Semiconductor lasers, Calibration, Inspection equipment, Multiphoton lithography, Bragg cells, Silica

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Proceedings Article | 17 January 2008 Paper

Laser writing system for test of large aspheric surfaces

Hyug-Gyo Rhee, Jae-Bong Song, Dong-Ik Kim, Kwan-Soo Ha, Seung-Ki Hong, Yun-Woo Lee, In-Won Lee, Jae-Heung Jo

Proceedings Volume 6723, 67233F (2008) https://doi.org/10.1117/12.783504

KEYWORDS: Computer generated holography, Laser systems engineering, Lenses, Aspheric lenses, Laser development, Optical fabrication, Spatial resolution, Laser stabilization, Control systems, Head

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Proceedings Article | 17 January 2008 Paper

Laser output power stabilization for circular laser writing systems by using acousto-optic modulator

Dong-Ik Kim, Hyug-Gyo Rhee, Jae-Bong Song, Yun-Woo Lee

Proceedings Volume 6723, 672357 (2008) https://doi.org/10.1117/12.783746

KEYWORDS: Bragg cells, Laser stabilization, Servomechanisms, Laser systems engineering, Computer generated holography, Argon ion lasers, Control systems, Helium neon lasers, Photodetectors, Mirrors

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Proceedings Article | 17 January 2008 Paper

Interferometric total thickness variation measurement of glass wafer

Jae-Bong Song, Hoi-Youn Lee, Yun-Woo Lee, In-Won Lee

Proceedings Volume 6723, 67233E (2008) https://doi.org/10.1117/12.783503

KEYWORDS: Semiconducting wafers, Glasses, Interferometers, Interferometry, Measurement devices, Quartz, Wavefronts, Light sources, Phase shifts, Optical testing

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Proceedings Article | 27 November 2007 Paper

Fabrication of MTF measurement system for a mobile phone lens using multi-square objects

Sung Mok Hong, Jae Heung Jo, Hoi Youn Lee, Ho Soon Yang, Yun Woo Lee, In Won Lee

Proceedings Volume 6723, 67233C (2007) https://doi.org/10.1117/12.783498

KEYWORDS: Modulation transfer functions, Cell phones, Sensors, Optical transfer functions, Signal detection, Cameras, CCD image sensors, Charge-coupled devices, Measurement devices, Optics manufacturing

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Proceedings Article | 14 November 2007 Paper

Development of TIF based figuring algorithm for deterministic pitch tool polishing

Hyun-Su Yi, Sug-Whan Kim, Ho-Soon Yang, Yun-Woo Lee

Proceedings Volume 6722, 67220K (2007) https://doi.org/10.1117/12.782849

KEYWORDS: Polishing, Surface finishing, Mirrors, Algorithm development, Motion models, Polishing equipment, Process control, Astronomical imaging, 3D modeling, Motion analysis

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Proceedings Article | 14 September 2007 Paper

Aspheric measurement based on the curvature sensing method

YongKwan Kwon, ByoungChang Kim, Duck Hyun Wang, YunWoo Lee, HoSoon Yang, HyugGyo Rhee

Proceedings Volume 6671, 667119 (2007) https://doi.org/10.1117/12.734117

KEYWORDS: Sensors, Aspheric lenses, Interferometers, Wavefronts, Mirrors, Metrology, Collimation, Ferroelectric materials, Objectives, Profiling

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Proceedings Article | 14 August 2006 Paper

A curvature sensor using white-light scanning interferometry

ByoungChang Kim, SeHeon Kim, YongKwan Kwon, YunWoo Lee, HoSoon Yang, HyugGyo Rhee

Proceedings Volume 6292, 629219 (2006) https://doi.org/10.1117/12.675925

KEYWORDS: Sensors, Interferometers, Wavefronts, Interferometry, Distance measurement, Objectives, Spherical lenses, Aspheric lenses, Profiling, Collimation

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Proceedings Article | 14 August 2006 Paper

Computer aided alignment using Zernike coefficients

Ho-Soon Yang, Sung-Hee Kim, Yun-Woo Lee, Jae-Bong Song, Hyug-Gyo Rhee, Hoi-Yoon Lee, Jae-Hyeob Lee, In-Won Lee, Sug-Whan Kim

Proceedings Volume 6293, 62930I (2006) https://doi.org/10.1117/12.678647

KEYWORDS: Collimators, Mirrors, Dysprosium, Optical alignment, Algorithm development, Optical design software, Telescopes, Neodymium, Detection and tracking algorithms, Optimization (mathematics)

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Proceedings Article | 1 February 2006 Paper

Optical test for the primary mirror of a space telescope using a CGH null lens

Jae Bong Song, Yun Woo Lee, Hoi Youn Lee, Ho Soon Yang, In Won Lee

Proceedings Volume 6034, 60341M (2006) https://doi.org/10.1117/12.668159

KEYWORDS: Computer generated holography, Phase modulation, Mirrors, Optical testing, Spatial frequencies, Aspheric lenses, Wavefronts, Interferometers, Space telescopes, Holograms

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Proceedings Article | 9 December 2005 Paper

Analysis of various correction factors for MTF measurement with a square object

Sung Mok Hong, Jae Heung Jo, Hee Sung Cho, Hoi Youn Lee, Ho Soon Yang, Yun Woo Lee, In Won Lee

Proceedings Volume 6024, 60240W (2005) https://doi.org/10.1117/12.666838

KEYWORDS: Modulation transfer functions, Charge-coupled devices, Lamps, Factor analysis, Halogens, Diffusers, Optical transfer functions, Error analysis, Gaussian beams, Fourier transforms

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Proceedings Article | 9 December 2005 Paper

Measurement of the birefringence distribution in high resolution laser scanning lenses

Hee Sung Cho, Yun Woo Lee, Jae Hyeob Lee, Chang Kwon Hwangbo, Jon Ung Lee

Proceedings Volume 6024, 602413 (2005) https://doi.org/10.1117/12.666846

KEYWORDS: Birefringence, Polarization, Liquids, Charge-coupled devices, Laser scanners, Lenses, Optical components, Polarizers, Wave plates, Point spread functions

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Proceedings Article | 19 August 2005 Paper

Real-time measurement of the small aspheric surface

Ho-Soon Yang, Jae-Bong Song, Yun-Woo Lee, Hoi-Yoon Lee, Jae-Hyeob Lee, In-Won Lee

Proceedings Volume 5869, 586916 (2005) https://doi.org/10.1117/12.616460

KEYWORDS: Computer generated holography, Sensors, Aspheric lenses, Interferometers, Wavefronts, Optical testing, Mirrors, Calibration, Manufacturing, Error analysis

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Proceedings Article | 19 August 2005 Paper

Development of Cassegrain type 0.9-m collimator

Ho-Soon Yang, Myung-Seok Kang, Sung-Hee Kim, Yun-Woo Lee, Jae-Hyub Lee, Jae-Bong Song, Hoi-Youn Lee, Sung-Whan Kim, Jong-Ung Lee, In-Won Lee

Proceedings Volume 5869, 586913 (2005) https://doi.org/10.1117/12.616174

KEYWORDS: Mirrors, Collimators, Telescopes, Space telescopes, Surface finishing, Optical alignment, Polishing, Interferometers, Optical fabrication, Manufacturing

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Proceedings Article | 14 February 2005 Paper

Fast data acquisition in imaging ellipsometry using four-frame method

Won Chegal, Yong Jai Cho, Hyun Mo Cho, Yun Woo Lee, Soo Hyun Kim

Proceedings Volume 5634, (2005) https://doi.org/10.1117/12.576807

KEYWORDS: Ellipsometry, Time metrology, Spectrographs, Fourier transforms, Imaging spectroscopy, Polarization, Polarizers, Spectroscopy, Sensors, Thin films

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Proceedings Article | 10 February 2005 Paper

Implementation of Hartmann test for measuring 0.9-m aspheric mirror

Ho-Soon Yang, Yun-Woo Lee, Jae-Hyub Lee, Jae-Bong Song, Hoi-Youn Lee, In-Won Lee

Proceedings Volume 5638, (2005) https://doi.org/10.1117/12.575568

KEYWORDS: Sensors, Mirrors, Aspheric lenses, Aspheric optics, Interferometers, Wavefronts, Polishing, Surface finishing, Optics manufacturing, Optical testing

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Proceedings Article | 10 February 2005 Paper

Algorithm for stylus instruments to measure aspheric surfaces

Byong Park, Y. Lee, Chang-ock Lee, Kilsu Park

Proceedings Volume 5638, (2005) https://doi.org/10.1117/12.574290

KEYWORDS: Aspheric lenses, Calibration, Algorithm development, Fourier transforms, Error analysis, Analytical research, C++, MATLAB, Manufacturing, Surface finishing

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Proceedings Article | 10 February 2005 Paper

Optical test of aspheric elements using instantaneous wedge plate phase shifting lateral shearing interferometer

Jae-Bong Song, Yoon-Woo Lee, In-Won Lee, Jong Ung Lee

Proceedings Volume 5638, (2005) https://doi.org/10.1117/12.576622

KEYWORDS: Wavefronts, Phase shifting, Shearing interferometers, Optical testing, Aspheric lenses, Phase shifts, Diffraction gratings, Optical components, Interferometers, Diffraction

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SPIE Journal Paper | 1 January 2005

Fast ray-tracing methods for LCD backlight simulation using the characteristics of the pattern

Won Yong Lee, Tong-Kun Lim, Yun-Woo Lee, In-Won Lee

OE, Vol. 44, Issue 01, 014004, (January 2005) https://doi.org/10.1117/12.10.1117/1.1814358

KEYWORDS: Monte Carlo methods, Ray tracing, Computer simulations, LCDs, Scattering, Lamps, Optical engineering, Algorithm development, Light scattering, Reflectors

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Proceedings Article | 15 October 2004 Paper

Azimuth calibration method in ellipsometer with imaging spectrograph

Won Chegal, Yong Jai Cho, Hyun Jong Kim, Hyun Mo Cho, Yun Woo Lee, Soo Hyun Kim

Proceedings Volume 5546, (2004) https://doi.org/10.1117/12.559382

KEYWORDS: Spectrographs, Calibration, Imaging spectroscopy, Ellipsometry, Sensors, Polarization, Signal detection, Optical testing, Spectroscopy, Thin films

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Proceedings Article | 14 October 2004 Paper

Determination of optical properties of titanium dioxide thin films on different substrates by using spectroscopic ellipsometry

Hyun Jong Kim, Yong Jai Cho, Hyun Mo Cho, Won Chegal, Yun Woo Lee, Sang Youl Kim

Proceedings Volume 5538, (2004) https://doi.org/10.1117/12.559427

KEYWORDS: Refractive index, Thin films, Silicon, Silicon films, Optical properties, Crystals, Spectroscopic ellipsometry, Dispersion, Thin film growth, Titanium dioxide

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Proceedings Article | 30 September 2004 Paper

Alignment methods for Cassegrain and RC telescope with wide field of view

Ho-Soon Yang, Yun-Woo Lee, Eugene Kim, Young-Wan Choi, Ad. Aziz Rasheed

Proceedings Volume 5528, (2004) https://doi.org/10.1117/12.558998

KEYWORDS: Telescopes, Space telescopes, Mirrors, Interferometers, Cameras, Optical alignment, Monochromatic aberrations, Wavefronts, Satellites, Device simulation

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Proceedings Article | 2 August 2004 Paper

Optical test using wedge plate phase-shifting lateral-shearing interferometer

Jae Bong Song, Yun Woo Lee, In Won Lee

Proceedings Volume 5531, (2004) https://doi.org/10.1117/12.559282

KEYWORDS: Phase shifts, Wavefronts, Optical testing, Phase shifting, Shearing interferometers, Interferometers, Aspheric lenses, Interferometry, Phase interferometry, Optical components

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Proceedings Article | 22 December 2003 Paper

Lateral shearing interferometer using phase-shifting technique without moving element

Jae Bong Song, Yoon Woo Lee, In Won Lee, Jung Hoon Lee

Proceedings Volume 5180, (2003) https://doi.org/10.1117/12.505396

KEYWORDS: Wavefronts, Phase shifts, Interferometers, Picosecond phenomena, Diffraction gratings, Shearing interferometers, Phase shifting, Diffraction, Interferometry, Sensors

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Proceedings Article | 8 December 2003 Paper

Fabrication of bifocal holographic lenses using holographic polymer-dispersed liquid crystal film

Jung Hoon Lee, Sang Jo Lee, Jae Bong Song, Yun Woo Lee, Chong Hoon Kwak

Proceedings Volume 5216, (2003) https://doi.org/10.1117/12.504679

KEYWORDS: Liquid crystals, Diffraction, Holograms, Polymers, Holography, Refractive index, Lenses, Computer generated holography, Photorefractive polymers, Electro optics

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Proceedings Article | 12 November 2003 Paper

Fast ray-tracing method for LCD backlight simulation using area ratio function

Won Yong Lee, Tong Kun Lim, Yun Woo Lee, In Won Lee

Proceedings Volume 5186, (2003) https://doi.org/10.1117/12.505364

KEYWORDS: Monte Carlo methods, Computer simulations, Ray tracing, LCDs, Lamps, Waveguides, Algorithm development, Reflectors, Scattering, Diffusers

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Proceedings Article | 28 March 2003 Paper

MTF measurement for optical engine of CRT rear-projection HDTV

Jong Sup Song, Yun Woo Lee, Hoi Youn Lee, In Won Lee, Jae Heung Jo, Won Yong Lee, Tong-Kun Lim

Proceedings Volume 5002, (2003) https://doi.org/10.1117/12.473874

KEYWORDS: Modulation transfer functions, CRTs, Image analysis, Spatial frequencies, Imaging systems, Optical transfer functions, Projection systems, Televisions, Charge-coupled devices, Relays

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Proceedings Article | 28 March 2003 Paper

New synthetic evaluation of color display using polychromatic MTF

Jong Sup Song, Yun Woo Lee, In Won Lee, Jae Heung Jo, Won Yong Lee, Tong-Kun Lim

Proceedings Volume 5002, (2003) https://doi.org/10.1117/12.473869

KEYWORDS: LCDs, Modulation transfer functions, Image analysis, Visualization, Spectroscopy, Luminous efficiency, Visual system, Eye, Image quality, Zoom lenses

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Proceedings Article | 20 September 2002 Paper

Simple lateral shearing interferometer using phase-shifting interferometry technique

Jae Bong Song, Yun Woo Lee, In Won Lee, Jung Hoon Lee

Proceedings Volume 4927, (2002) https://doi.org/10.1117/12.464343

KEYWORDS: Phase shifting, Shearing interferometers, Wavefronts, Phase shifts, Ferroelectric materials, Phase interferometry, Interferometers, Interferometry, Prisms, Error analysis

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Proceedings Article | 20 September 2002 Paper

Polychromatic modulation transfer function analysis of color LCD

Jong Sup Song, Yun Woo Lee, Hyun-Mo Cho, Seung Nam Park, In Won Lee, Jae Heung Jo

Proceedings Volume 4927, (2002) https://doi.org/10.1117/12.464314

KEYWORDS: LCDs, Modulation transfer functions, CRTs, Image quality, Image analysis, Objectives, Charge-coupled devices, Analytical research, Displays, Spatial resolution

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Proceedings Article | 30 August 2002 Paper

Propagation characteristics of Bessel beam using phase type CGH

Jung Hoon Lee, Sang-Jo Lee, Chon Su Kyong, Jae Bong Song, Yun Woo Lee, ChongHoon Kwak

Proceedings Volume 4924, (2002) https://doi.org/10.1117/12.481529

KEYWORDS: Computer generated holography, Bessel beams, Holograms, Beam propagation method, Optical design, Wavefronts, Binary data, Digital holography, Volume holography, Holographic optical elements

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Proceedings Article | 19 June 2002 Paper

Measurement of highly parabolic mirror using computer-generated hologram

Tae-hee Kim, James Burge, Yun Woo Lee

Proceedings Volume 4778, (2002) https://doi.org/10.1117/12.473534

KEYWORDS: Computer generated holography, Mirrors, Autocollimation, Wavefronts, Diffraction gratings, Aspheric lenses, Optical design, Optical testing, Diffraction, Binary data

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Proceedings Article | 19 June 2002 Paper

Dual testing of a large-aperture optical system

Jong Sup Song, Yun Woo Lee, Jae Bong Song, In Won Lee, Ho-Soon Yang, Young-Wan Choi, Jae Heung Jo

Proceedings Volume 4778, (2002) https://doi.org/10.1117/12.473560

KEYWORDS: Modulation transfer functions, Wavefronts, Telescopes, Mirrors, Interferometers, Collimators, Off axis mirrors, Collimation, Optical testing, Image analysis

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Proceedings Article | 26 April 2002 Paper

Evaluation of color display by polychromatic MTF

Jong Sup Song, Yun Woo Lee, In Won Lee, Jae Heung Jo, Soo Chang

Proceedings Volume 4657, (2002) https://doi.org/10.1117/12.463787

KEYWORDS: LCDs, Modulation transfer functions, Objectives, Charge-coupled devices, Image quality, Image analysis, Imaging systems, Cameras, Manufacturing, Modulation

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SPIE Journal Paper | 1 February 2002

Peak movement detection method of an equally-spaced fringe for precise position measurement

Jong Hoon Yi, Soo Hyun Kim, Yoon Keun Kwak, Yun Woo Lee

OE, Vol. 41, Issue 02, (February 2002) https://doi.org/10.1117/12.10.1117/1.1431253

KEYWORDS: Mirrors, Fringe analysis, Error analysis, Wavefront distortions, Quantization, Computer simulations, Spatial frequencies, Adaptive optics, Interferometers, Motion measurement

Proceedings Article | 8 May 2001 Paper

In-situ single-wavelength ellipsometer for a vacuum chamber

Won Chegal, Sangheon Ye, Hyun-Mo Cho, Yoonwoo Lee, Soo Hyun Kim, Yoon Keun Kwak

Proceedings Volume 4416, (2001) https://doi.org/10.1117/12.426993

KEYWORDS: Calibration, Polarizers, Thin films, Silicon, Semiconducting wafers, Thin film deposition, Silver, Analytical research, Nickel, Silicon films

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Proceedings Article | 8 May 2001 Paper

Multipoint process monitoring system based on an acousto-optic tunable filter (AOTF)

Dae Kim, Jang You, Soo Hyun Kim, Hong-Jin Kong, Yun Woo Lee, Won Chegal, Yoon Keun Kwak

Proceedings Volume 4416, (2001) https://doi.org/10.1117/12.427049

KEYWORDS: Fourier transforms, Acousto-optics, Tunable filters, Near infrared, Crystals, Spectroscopy, Optical fibers, Acoustics, Transmittance, Imaging spectroscopy

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Proceedings Article | 6 October 2000 Paper

Testing method of off-axis parabolic cylinder mirror for FIMS

Kwangsun Ryu, Jerry Edelstein, Jae Bong Song, Yunwoo Lee, Jinseok Chae, Kwangil Seon, Insoo Yuk, Eric Korpela, Jongho Seon, Uk-won Nam, Wonyong Han, Kyung-wook Min

Proceedings Volume 4231, (2000) https://doi.org/10.1117/12.402822

KEYWORDS: Mirrors, Off axis mirrors, Computer generated holography, Interferometers, Manufacturing, Surface finishing, Optics manufacturing, Far ultraviolet, Polishing, Optical fibers

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Proceedings Article | 25 October 1999 Paper

Differential intensity detection of surface defect scattering

Byong Chon Park, Yun Woo Lee, Beomhoan O

Proceedings Volume 3784, (1999) https://doi.org/10.1117/12.366720

KEYWORDS: Particles, Scattering, Bidirectional reflectance transmission function, Laser scattering, Air contamination, Light scattering, Polarization, Defect detection, Signal detection, Laser scanners

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SPIE Journal Paper | 1 October 1999

Evaluation of image quality of color liquid crystal displays by measuring modulation transfer function

Tae-hee Kim, Yun Woo Lee, Hyun-Mo Cho, In Won Lee

OE, Vol. 38, Issue 10, (October 1999) https://doi.org/10.1117/12.10.1117/1.602275

KEYWORDS: Modulation transfer functions, LCDs, Image quality, Charge-coupled devices, Eye, Signal to noise ratio, Sensors, Optical filters, Control systems, Objectives

Proceedings Article | 30 October 1998 Paper

Scatterometer at Korea Research Institute of Standards and Science (KRISS) for bidirectional reflectance distribution function (BRDF)

Byong Chon Park, Yun Woo Lee, Beomhoan O

Proceedings Volume 3426, (1998) https://doi.org/10.1117/12.328472

KEYWORDS: Bidirectional reflectance transmission function, Receivers, Scattering, Diffraction, Light sources, Argon ion lasers, Laser scattering, Sensors, Light scattering, Collimation

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Proceedings Article | 1 November 1997 Paper

MTF measurement of LCDs by a linear CCD imager: I. Monochrome case

Tae-hee Kim, O. Choe, Yun Woo Lee, Hyun-Mo Cho, In Won Lee

Proceedings Volume 3134, (1997) https://doi.org/10.1117/12.295125

KEYWORDS: Modulation transfer functions, LCDs, Image quality, Charge-coupled devices, Imaging systems, Spatial frequencies, Bismuth, Image resolution, Quality measurement, Image processing

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Proceedings Article | 1 September 1996 Paper

A new technique for measuring radius of curvature using half-aperture bidirectional shearing interferometer

Yun Woo Lee

Proceedings Volume 2778, 277833 (1996) https://doi.org/10.1117/12.2298993

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Proceedings Article | 16 August 1996 Paper

Determination of microstructure related optical constants of titanium dioxide thin films using optical methods

Sang-Youl Kim, Hee Kim, Hyun-Mo Cho, Yun Woo Lee

Proceedings Volume 2873, (1996) https://doi.org/10.1117/12.246228

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SPIE Journal Paper | 1 February 1996

Measurement of a long radius of curvature using a half-aperture bidirectional shearing interferometer

Yun Woo Lee, Hyun-Mo Cho, In Won Lee

OE, Vol. 35, Issue 02, (February 1996) https://doi.org/10.1117/12.10.1117/1.600919

KEYWORDS: Mirrors, Shearing interferometers, Wavefronts, Collimation, Darmstadtium, Interferometry, Fringe analysis, Optical engineering, Error analysis, Molybdenum

SPIE Journal Paper | 1 November 1993

Half-aperture shearing interferometer for collimation testing

Yun Woo Lee, Hyun-Mo Cho, In Won Lee

OE, Vol. 32, Issue 11, (November 1993) https://doi.org/10.1117/12.10.1117/12.148124

KEYWORDS: Collimation, Shearing interferometers, Wavefronts, Interferometers, Mirrors, Analytical research, Interferometry, Lithium, Fringe analysis, Visualization

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