Patents by Inventor Muthukumaran Packirisamy

Muthukumaran Packirisamy 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).

  • Publication number: 20110262307
    Abstract: The present application is directed to a technological platform with integrated microfluidic and optical modules for bio-detection. The platform enables in-situ detection by integrating fluidics with optical source and detection capabilities within a fabricated microchip. The platform is a polymer-based microfluidic chip having integrated excitation source and detection elements in a vicinity of a microfluidic reaction chamber configured to contain a micro-volume of a test sample. The principle of detection is based on an excitation source induced fluorescence of the test sample within the microfluidic reaction chamber.
    Type: Application
    Filed: July 21, 2009
    Publication date: October 27, 2011
    Applicant: Valorbec S.E.C.
    Inventors: Muthukumaran Packirisamy, Ashwn L. Acharya
  • Publication number: 20080318242
    Abstract: Methods and devices for detecting a cancer cell and cancer cell types in a sample of a subject are provided.
    Type: Application
    Filed: June 20, 2008
    Publication date: December 25, 2008
    Inventors: Ion Stiharu, Muthukumaran Packirisamy, Miguel Burnier, Jean-Claude Marshall
  • Patent number: 7420734
    Abstract: Diffraction gratings are formed from grooves each having a reflective facet and a non-reflective facet. The net reflection of TE (Transverse Electric) and TM (Transverse Magnetic) polarizations from the grating structure is traded off against the polarization dependent reflection, by controlling the degree of metallization of the reflective facet and by ensuring that there is no metallization of non-reflective sidewalls. other diffraction gratings are manufactured from trenches etched perpendicular to a waveguide. The trenches are metallized and back-filled with a filling material having a refractive index matched to that of the waveguide. The gratings essentially have no non-reflecting sidewalls with insignificant polarization influence from side walls.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: September 2, 2008
    Assignee: Valorbec Societe En Commandite
    Inventors: Ashok Balakrishnan, Kokou Dossou, Muthukumaran Packirisamy
  • Patent number: 7324195
    Abstract: Planar waveguide based grating devices and spectrometers, for species-specific wavelength detection for example, are disclosed. A planar waveguide spectrometer apparatus may have a microfluidic channel or compartment microfabricated integrally with a planar waveguide or hybrid assembled with the planar waveguide and optically coupled thereto. The planar waveguide may also include a thin planar substrate which is made of a transparent waveguiding optical material and has a planar multilayer, one or more input waveguides, a waveguide-based spectrometer, and one or more output waveguides integrally formed thereon. An apparatus which incorporates a planar waveguide, a diffractive construct for diffracting light through the planar waveguide onto a curved image surface, and a plurality of output waveguides emanating from the curved image surface at locations selected to extract predetermined wavelengths or wavelength ranges, is also disclosed.
    Type: Grant
    Filed: January 10, 2005
    Date of Patent: January 29, 2008
    Assignee: Valorbec Societe Em Commandite
    Inventors: Muthukumaran Packirisamy, Ashok Balakrishnan
  • Publication number: 20060119945
    Abstract: Diffraction gratings are formed from grooves each having a reflective facet and a non-reflective facet. The net reflection of TE (Transverse Electric) and TM (Transverse Magnetic) polarizations from the grating structure is traded off against the polarization dependent reflection, by controlling the degree of metallization of the reflective facet and by ensuring that there is no metallization of non-reflective sidewalls. other diffraction gratings are manufactured from trenches etched perpendicular to a waveguide. The trenches are metallized and back-filled with a filling material having a refractive index matched to that of the waveguide. The gratings essentially have no non-reflecting sidewalls with insignificant polarization influence from side walls.
    Type: Application
    Filed: August 26, 2003
    Publication date: June 8, 2006
    Inventors: Ashok Balakrishnan, Kokou Dossou, Muthukumaran Packirisamy
  • Publication number: 20050151966
    Abstract: Planar waveguide based grating devices and spectrometers, for species-specific wavelength detection for example, are disclosed. A planar waveguide spectrometer apparatus may have a microfluidic channel or compartment microfabricated integrally with a planar waveguide or hybrid assembled with the planar waveguide and optically coupled thereto. The planar waveguide may also include a thin planar substrate which is made of a transparent waveguiding optical material and has a planar multilayer, one or more input waveguides, a waveguide-based spectrometer, and one or more output waveguides integrally formed thereon. An apparatus which incorporates a planar waveguide, a diffractive construct for diffracting light through the planar waveguide onto a curved image surface, and a plurality of output waveguides emanating from the curved image surface at locations selected to extract predetermined wavelengths or wavelength ranges, is also disclosed.
    Type: Application
    Filed: January 10, 2005
    Publication date: July 14, 2005
    Inventors: Muthukumaran Packirisamy, Ashok Balakrishnan
  • Publication number: 20040240063
    Abstract: A method is desribed for controlling the pass band of an optical device wherein a phase mask is introduced to modify the shaped of an image produced by the photonic device.
    Type: Application
    Filed: November 28, 2003
    Publication date: December 2, 2004
    Inventors: Andre Delage, Muthukumaran Packirisamy, Siegfried Janz, Lynden Erickson, Dan-Xia Xu, Pavel Cheben, Boris Lamontage, Sylvain Charbonneau
  • Patent number: 6766077
    Abstract: A planar waveguide grating device has a slab waveguide defining an input channel and a plurality of output channels. An echelle grating has a multitude of facets, each of the facets being blazed with respect to a preselected output channel. Each facet has an elliptical curvature so as to be astigmatic with respect to the input channel and the preselected output channel. The echelle grating is preferably based on a Rowland circle design. The astigmatic design of the facets reduces aberrations at high orders.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: July 20, 2004
    Assignee: LNL Technologies, Inc.
    Inventors: Muthukumaran Packirisamy, Andre Delage
  • Publication number: 20030091282
    Abstract: A planar waveguide grating device has a slab waveguide defining an input channel and a plurality of output channels. An echelle grating has a multitude of facets, each of the facets being blazed with respect to a preselected output channel. Each facet has an elliptical curvature so as to be astigmatic with respect to the input channel and the preselected output channel. The echelle grating is preferably based on a Rowland circle design. The astigmatic design of the facets reduces aberrations at high orders.
    Type: Application
    Filed: November 13, 2001
    Publication date: May 15, 2003
    Inventors: Muthukumaran Packirisamy, Andre Delage