Patents by Inventor Narsingh B. Singh

Narsingh B. Singh 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).

  • Thallium arsenic sulfide crystals (t1.sub.3 AsS.sub.3) high efficiency nonlinear optical applications
    Patent number: 5563730
    Abstract: Crystals formed of Tl.sub.3 AsS.sub.3 provide very good materials for the nonlinear optical conversion efficiency. The crystals are useful in nonlinear optical devices such as harmonic generators and optical parametric oscillators, and in linear applications such as acousto-optical devices. The method of preparing such crystals is also disclosed.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: October 8, 1996
    Assignee: Northrop Grumman Corporation
    Inventors: Narsingh B. Singh, James P. McHugh, Emmanuel P. Supertzi, Tom Henningsen, Richard P. Storrick, Robert Mazelsky
  • Solid solution crystals of Tl.sub.3 AsSe.sub.3 and Tl.sub.3 AsS.sub.3 for high efficiency optical applications
    Patent number: 5510929
    Abstract: Crystals formed of a solid-solution of Tl.sub.3 AsSe.sub.3 and Tl.sub.1 AsS.sub.3 provide very good materials for the nonlinear optical conversion efficiency. The crystals are useful in nonlinear optical devices such as harmonic generators and optical parametric oscillators, and in linear applications such as acousto-optical devices. The method of preparing such crystals is also disclosed.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: April 23, 1996
    Assignee: Westinghouse Electric Corporation
    Inventors: Narsingh B. Singh, Tom Henningsen, James P. McHugh, Emmanuel P. Supertzi, Richard P. Storrick, Robert Mazelsky
  • Acousto-optic devices utilizing thallium arsenic sulfide (T1AsS.sub.3) crystals
    Patent number: 5504615
    Abstract: Acousto-optical devices utilize crystals of a novel material thallium arsenic sulfide (Tl.sub.3 AsS.sub.3) grown from a melt. A Tl.sub.3 AsS.sub.3 crystal is cut and parallel faces are prepared and polished. A piezoelectric transducer connected to an RF generator is placed on the acoustic face to generate sound waves. The light is directed through the optical face of the crystal and interacts with the acoustic waves. These devices may be used in signal processing, spectrum analyzing, spectroscopic, liquid analyzing and spectral imaging systems.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: April 2, 1996
    Assignee: Westinghouse Electric Corporation
    Inventors: Narsingh B. Singh, Milton S. Gottlieb, James P. McHugh, Robert Mazelsky
  • Chalcogenide glass, associated method and apparatus
    Patent number: 5077239
    Abstract: A crystal of a composition of silver, thallium, and sulfur is useful in non-linear optical devices, acousto-optical devices, piezo electric devices and other types of optical and acoustic devices. The chalcogenide glass composition of the invention displays superior transmission beyond 12 .mu.m.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: December 31, 1991
    Assignee: Westinghouse Electric Corp.
    Inventors: Narsingh B. Singh, Richard H. Hopkins, Walter E. Gaida, Robert Mazelsky
  • Precious metal doped crystals for hardening of the crystals
    Patent number: 4955699
    Abstract: Disclosed is a crystal 1 of thallium arsenic selenide, thallium arsenic sulfide, thallium vanadium sulfide, thallium phosphorous selenide, lead halide, cadmium sulfide, cadmium selenide, cadmium tin arsenide, cadmium germanium arsenide, indium phosphoride, indium arsenide, or mixtures thereof, doped with a precious metal in an amount of about 25 ppm up to the solubility limit of a precious metal in the crystal. The crystal is useful in nonlinear optical devices, acousto-optical devices, piezoelectric devices, and other types of optical and acoustic devices.
    Type: Grant
    Filed: November 23, 1988
    Date of Patent: September 11, 1990
    Assignee: Westinghouse Electric Corp.
    Inventors: Narsingh B. Singh, Tom Henningsen, Robert Mazelsky, Richard H. Hopkins, Milton S. Gottlieb