Patents by Inventor Shyam Raghunandan

Shyam Raghunandan 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: 20070139791
    Abstract: An optimized illumination system that efficiently produces uniform illumination for exposure, photoablation, and laser crystallization systems. The illumination system includes a homogenizer that uniformizes and shapes a light beam, which is directed onto a mask by condenser optics. The illumination system recycles radiation by directing light reflected by the mask back into the illumination system, where an apertured mirror situated at the input end re-directs it back toward the mask. The relative mirror and aperture sizes affect recycling efficiency and system throughput, so the system features a wide recycling segment enabling greater mirror-to-aperture area ratios. An added segment at the output end of the homogenizer matches the homogenizer diameter to the projection imaging system object field size. This standardizes the homogenizer and condenser lens construction system, reducing the need for customized parts and thus reducing manufacturing time and expense.
    Type: Application
    Filed: December 18, 2006
    Publication date: June 21, 2007
    Applicant: Anvik Corporation
    Inventors: Shyam Raghunandan, Kanti Jain, Marc Zemel, Marc Klosner, Sivarama Kuchibhotla
  • Patent number: 7226542
    Abstract: Portable personal water purifier with a microdischarge array sealed with a radiation emitter, preferably Xel, slightly above atmospheric or water pressure in a closely-configured treatment chamber. Each array is a polyimide film separating a copper layer or mesh cathode surface from a conductor pattern of nickel anodes at UV pixel via sites, juxtaposed in effective purifying range of all the water. In a canteen embodiment, the array is presented as a divider in the water chamber, or at its sides. In a continuous-flow embodiment, the array is presented as a spiral flow-through packet between input and output connections axial to a cylindrical water jacket. Battery or plug power is provided, along with any desired input filter. Two microdischarge arrays are preferably sealed in a twin-pack about a set of stiffener rods, extending outward for re-assembly in sockets after cleaning. Other separation assurance devices are spiral and chain separators.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: June 5, 2007
    Assignee: Anvik Corporation
    Inventors: Marc I. Zemel, Leszek Wojcik, Shyam Raghunandan
  • Patent number: 7158305
    Abstract: An optimized illumination system that efficiently produces uniform illumination for exposure, photoablation, and laser crystallization systems. The illumination system includes a homogenizer that uniformizes and shapes a light beam, which is directed onto a mask by condenser optics. The illumination system recycles radiation by directing light reflected by the mask back into the illumination system, where an apertured mirror situated at the input end re-directs it back toward the mask. The relative areas of the mirror and aperture affect recycling efficiency and system throughput, so the system features a larger-diameter recycling segment enabling greater mirror-to-aperture area ratios. An added segment at the output end of the homogenizer matches the homogenizer diameter to the projection imaging system object field size. This standardizes the homogenizer and condenser lens integration, reducing the need for customized parts and thus reducing manufacturing time and expense.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: January 2, 2007
    Assignee: Anvik Corporation
    Inventors: Shyam Raghunandan, Kanti Jain, Marc I. Zemel, Marc A. Klosner, Sivarama K. Kuchibhotla
  • Publication number: 20060001845
    Abstract: An optimized illumination system that efficiently produces uniform illumination for exposure, photoablation, and laser crystallization systems. The illumination system includes a homogenizer that uniformizes and shapes a light beam, which is directed onto a mask by condenser optics. The illumination system recycles radiation by directing light reflected by the mask back into the illumination system, where an apertured mirror situated at the input end re-directs it back toward the mask. The relative areas of the mirror and aperture affect recycling efficiency and system throughput, so the system features a larger-diameter recycling segment enabling greater mirror-to-aperture area ratios. An added segment at the output end of the homogenizer matches the homogenizer diameter to the projection imaging system object field size. This standardizes the homogenizer and condenser lens integration, reducing the need for customized parts and thus reducing manufacturing time and expense.
    Type: Application
    Filed: June 29, 2004
    Publication date: January 5, 2006
    Applicant: Anvik Corporation
    Inventors: Shyam Raghunandan, Kanti Jain, Marc Zemel, Marc Klosner, Sivarama Kuchibhotla
  • Publication number: 20050183996
    Abstract: Portable personal water purifier with a microdischarge array sealed with a radiation emitter, preferably XeI, slightly above atmospheric or water pressure in a closely-configured treatment chamber. Each array is a polyimide film separating a copper layer or mesh cathode surface from a conductor pattern of nickel anodes at UV pixel via sites. The sealed microdischarge array is juxtaposed in effective purifying range of all the water. In a canteen embodiment, the array is presented as a divider in the water chamber, or at its sides. In a continuous-flow embodiment, the array is presented as a spiral flow-through packet between input and output connections axial to a cylindrical water jacket. Battery or plug power is provided, along with any desired input filter. Two microdischarge arrays are preferably sealed in a twin-pack about a set of stiffener rods, which may extend outward for re-assembly in positioning sockets after cleaning. Other separation assurance devices are spiral and chain separators.
    Type: Application
    Filed: August 22, 2003
    Publication date: August 25, 2005
    Inventors: Marc Zemel, Leszek Wojcik, Shyam Raghunandan