Patents by Inventor Wonsik Kwon

Wonsik Kwon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Prism for inducing Brewster's angle transmission and fluorescence detection apparatus for improving signal-to noise ratio using thereof
    Patent number: 8237925
    Abstract: The present invention relates to a prism for inducing Brewster's angle transmission and a fluorescence detection apparatus for enhancing a signal-to-noise ratio using thereof, and more specifically, to a prism for inducing Brewster's angle transmission and a fluorescence detection apparatus for enhancing a signal-to-noise ratio using thereof, in which evanescent waves are generated when light is cast onto fluorescence material applied on a sample surface at an angle greater than a critical angle, and the evanescent waves are used as excitation light of fluorescence to induce total internal reflection of the light so that the light may pass through the prism at a Brewster's angle. Therefore, effects of the re-reflected light on the sample surface are removed, and a signal-to-noise ratio (SNR) is improved at the same time. In addition, the prism is miniaturized, and therefore, usage of the sample area and efficiency of the light amount are improved.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: August 7, 2012
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Youngjoo Hong, Jeongho Ahn, Hyojun Park, Hyungchul Lee, Sungyoon Ryu, Wonsik Kwon, Soohyun Kim
  • Prism for inducing Brewster's angle transmission and fluorescence detection apparatus for improving signal-to-noise ratio using thereof
    Publication number: 20100225915
    Abstract: The present invention relates to a prism for inducing Brewster's angle transmission and a fluorescence detection apparatus for enhancing a signal-to-noise ratio using thereof, and more specifically, to a prism for inducing Brewster's angle transmission and a fluorescence detection apparatus for enhancing a signal-to-noise ratio using thereof, in which evanescent waves are generated when light is cast onto fluorescence material applied on a sample surface at an angle greater than a critical angle, and the evanescent waves are used as excitation light of fluorescence to induce total internal reflection of the light so that the light may pass through the prism at a Brewster's angle. Therefore, effects of the re-reflected light on the sample surface are removed, and a signal-to-noise ratio (SNR) is improved at the same time. In addition, the prism is miniaturized, and therefore, usage of the sample area and efficiency of the light amount are improved.
    Type: Application
    Filed: October 14, 2009
    Publication date: September 9, 2010
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Youngjoo Hong, Jeongho Ahn, Hyojun Park, Hyungchul Lee, Sungyoon Ryu, Wonsik Kwon, Soohyun Kim