Dr. Youngjune Cho Profile

Dr. Youngjune Cho

Vice President at Korea Institute of Industrial Technology

SPIE Involvement:

Author

Proceedings Article | 19 October 2006 Paper

The simple and practical variable optical attenuator using a piezoelectric sheet containing an optical fiber

Seungtaek Kim, Heuiseok Kang, Sungbok Kang, Won Kim, Hoon Jeong, Youngjune Cho

Proceedings Volume 6374, 63740G (2006) https://doi.org/10.1117/12.685676

KEYWORDS: Ferroelectric materials, Optical fibers, Electrodes, Variable optical attenuators, Cameras, Single mode fibers, Numerical analysis, Optical alignment, Signal attenuation, Optical communications

Read Abstract +

Proceedings Article | 19 October 2006 Paper

Sol-Gel-based 1x2 power splitter for a plastic optical fiber

H. Jeong, Y. Cho, S. Kim

Proceedings Volume 6374, 63740J (2006) https://doi.org/10.1117/12.685669

KEYWORDS: Beam propagation method, Waveguides, Sol-gels, Polymer optical fibers, Optical fabrication, Optical simulations, Optical communications, Phase only filters, Cladding, Surface roughness

Read Abstract +

Proceedings Article | 6 December 2005 Paper

Microassembly of peg and hole using active zooming

Xiaodong Tao, Hyungsuck Cho, Youngjun Cho

Proceedings Volume 6052, 605204 (2005) https://doi.org/10.1117/12.650313

KEYWORDS: Visualization, Zoom lenses, Fuzzy systems, Fuzzy logic, Optical tracking, Edge detection, Virtual colonoscopy, Cameras, Image processing, Microscopes

Read Abstract +

Proceedings Article | 6 December 2005 Paper

Flip-chip alignment with a dual imaging system using a visual servoing method

Daljae Lee, Xiaodong Tao, Hyungsuck Cho, Youngjun Cho

Proceedings Volume 6052, 605203 (2005) https://doi.org/10.1117/12.650315

KEYWORDS: Visualization, Imaging systems, Distributed interactive simulations, Feature extraction, Zoom lenses, Packaging, Charge-coupled devices, Light emitting diodes, Cameras, Mirrors

Read Abstract +

Proceedings Article | 5 December 2005 Paper

Design and analysis of a rotor type magneto-rheological fluid brake and clutch

S. Kang, H. Jeong, K. Shin, S. Kim, Y. Cho, K. Kang

Proceedings Volume 6048, 60480I (2005) https://doi.org/10.1117/12.648828

KEYWORDS: Magnetism, Finite element methods, Electromagnetism, Microfluidics, Fluid dynamics, Velocity measurements, Power supplies, Digital signal processing, Patents, Particles

Read Abstract +

Proceedings Article | 5 December 2005 Paper

The simple and cost-effective method for the voltage controlled variable optical attenuator using the piezoelectric ceramic tube with the electrodes on the surface

Seungtaek Kim, Heuiseok Kang, Sungbok Kang, Won Kim, Hoon Jeong, Youngjune Cho

Proceedings Volume 6048, 60480H (2005) https://doi.org/10.1117/12.647222

KEYWORDS: Ferroelectric materials, Variable optical attenuators, Electrodes, Ceramics, Single mode fibers, Numerical analysis, Signal attenuation, Refractive index, Cladding, Telecommunications

Read Abstract +

Proceedings Article | 5 December 2005 Paper

Design and parameter optimization of flip-chip bonder

Hyoungsub Shim, Heuiseok Kang, Hoon Jeong, Youngjune Cho, Wansoo Kim, Shinill Kang

Proceedings Volume 6048, 60480G (2005) https://doi.org/10.1117/12.648757

KEYWORDS: Head, Scanning electron microscopy, Semiconducting wafers, Wafer bonding, Manufacturing, Temperature metrology, Packaging, Optics manufacturing, Information technology, Manufacturing equipment

Read Abstract +

Proceedings Article | 25 October 2004 Paper

Waveguide-MEMS cascaded variable optical attenuator with enhanced performance

Yunsong Jeong, Sangchul Bae, Kyunghwan Oh, Hoon Jeong, Young June Cho

Proceedings Volume 5602, (2004) https://doi.org/10.1117/12.571142

KEYWORDS: Signal attenuation, Waveguides, Variable optical attenuators, Photoelasticity, Single mode fibers, Attenuators, Refractive index, Actuators, Phase shifts, Fiber optics

Read Abstract +

Proceedings Article | 25 October 2004 Paper

Theoretical proposal and experimental demonstration of novel first light search algorithm using the tilting stages in the optical fiber assembly process

Seungtaek Kim, Heuiseok Kang, Sungbok Kang, Kyungkyun Lee, YoungJune Cho

Proceedings Volume 5602, (2004) https://doi.org/10.1117/12.570775

KEYWORDS: Optical alignment, Optical filters, GRIN lenses, Optical fibers, Algorithms, Fiber optic components, Wavelength division multiplexing, Assembly equipment, Thin films, Optical testing

Read Abstract +