Dr. Hyejun Ra Profile

Dr. Hyejun Ra

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Publications (7)

SPIE Journal Paper | 2 March 2012 Open Access

In vivo near-infrared dual-axis confocal microendoscopy in the human lower gastrointestinal tract

Wibool Piyawattanametha, Hyejun Ra, Kevin Loewke, Michael Mandella, Christopher Contag, Zhen Qiu, Thomas Wang, Shai Friedland, Jonathan Liu, Gordon Kino, Olav Solgaard

JBO, Vol. 17, Issue 02, 021102, (March 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.2.021102

KEYWORDS: Confocal microscopy, In vivo imaging, Luminescence, Microelectromechanical systems, Tissues, Mirrors, Endoscopes, Colorectal cancer, Collimation, Scanners

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SPIE Journal Paper | 1 May 2010 Open Access

Assessing delivery and quantifying efficacy of small interfering ribonucleic acid therapeutics in the skin using a dual-axis confocal microscope

Hyejun Ra, Emilio Gonzalez-Gonzalez, Bryan Smith, Sanjiv Gambhir, Gordon Kino, Olav Solgaard, Roger Kaspar, Christopher Contag

JBO, Vol. 15, Issue 03, 036027, (May 2010) https://doi.org/10.1117/12.10.1117/1.3432627

KEYWORDS: Skin, Microscopes, Green fluorescent protein, In vivo imaging, Confocal microscopy, 3D image processing, Visualization, Mouse models, Molecular imaging, Luminescence

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SPIE Journal Paper | 1 March 2010 Open Access

Micromirror-scanned dual-axis confocal microscope utilizing a gradient-index relay lens for image guidance during brain surgery

Jonathan Liu, Michael Mandella, Nathan Loewke, Henry Haeberle, Hyejun Ra, Wibool Piyawattanametha, Olav Solgaard, Gordon Kino, Christopher Contag

JBO, Vol. 15, Issue 02, 026029, (March 2010) https://doi.org/10.1117/12.10.1117/1.3386055

KEYWORDS: Microscopes, Relays, Microelectromechanical systems, Mirrors, Confocal microscopy, GRIN lenses, Gradient-index optics, Actuators, Brain, Neuroimaging

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Proceedings Article | 5 October 2009 Paper

Optomechanical fiber gyroscope

Onur Kilic, Onur Can Akkaya, Hyejun Ra, Michel Digonnet, Gordon Kino, Olav Solgaard

Proceedings Volume 7503, 750345 (2009) https://doi.org/10.1117/12.835141

KEYWORDS: Gyroscopes, Signal to noise ratio, Microelectromechanical systems, Signal detection, Sensors, Mirrors, Prototyping, Modulation, Interference (communication), Fabry–Perot interferometers

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Proceedings Article | 14 February 2007 Paper

Compact optical design for dual-axes confocal endoscopic microscopes

Michael Mandella, Jonathan Liu, Wibool Piyawattanametha, Hyejun Ra, Pei-Lin Hsiung, Larry Wong, Olav Solgaard, Thomas Wang, Christopher Contag, Gordon Kino

Proceedings Volume 6443, 64430E (2007) https://doi.org/10.1117/12.699484

KEYWORDS: Mirrors, Tissues, Microscopes, Microelectromechanical systems, Confocal microscopy, Natural surfaces, Endoscopy, In vivo imaging, Collimation, Scanners

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Proceedings Article | 22 January 2007 Paper

Reflectance and fluorescence imaging with a MEMS dual–axes confocal microscope

Hyejun Ra, Wibool Piyawattanametha, Yoshihiro Taguchi, Olav Solgaard

Proceedings Volume 6466, 64660G (2007) https://doi.org/10.1117/12.711560

KEYWORDS: Microelectromechanical systems, Scanners, Mirrors, Luminescence, Reflectivity, Confocal microscopy, Microscopes, Silicon, Semiconducting wafers, Aluminum

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Proceedings Article | 22 January 2005 Paper

High-resolution microelectromechanical scanners for miniaturized dual-axes confocal microscopes

Hyejun Ra, Il-Woong Jung, Daesung Lee, Uma Krishnamoorthy, Kyoungsik Yu, Olav Solgaard

Proceedings Volume 5721, (2005) https://doi.org/10.1117/12.597331

KEYWORDS: Confocal microscopy, Microscopes, Scanners, Semiconducting wafers, Silicon, Photomasks, Deep reactive ion etching, Oxides, Teeth, Micromirrors

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Showing 5 of 7 publications

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