Patents by Inventor Todor Kalkandjiev

Todor Kalkandjiev 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).

  • Photonic devices based on conical refraction
    Patent number: 8542712
    Abstract: An optical system (31) with an input optical source (33) for projecting an input beam along an optical axis and an optical element (37, 43) which creates a cone refracted beam (41) from the input beam (35) then reconstructs the input beam (49). The optical element may comprise a first cone refractive element (37) which creates a cone refracted beam and reconstructs the beam using a reconstructing optical element (43) to apply a phase shift to the cone refracted beam. The optical system may be used to form a laser or a gain medium for a laser.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: September 24, 2013
    Assignee: University of Dundee
    Inventors: Edik Rafailov, Amin Abdolvand, Todor Kalkandjiev
  • NOVEL PHOTONIC DEVICES BASED ON CONICAL REFRACTION
    Publication number: 20120082179
    Abstract: An optical system (31) with an input optical source (33) for projecting an input beam along an optical axis and an optical element (37, 43) which creates a cone refracted beam (41) from the input beam (35) then reconstructs the input beam (49). The optical element may comprise a first cone refractive element (37) which creates a cone refracted beam and reconstructs the beam using a reconstructing optical element (43) to apply a phase shift to the cone refracted beam. The optical system may be used to form a laser or a gain medium for a laser.
    Type: Application
    Filed: January 21, 2010
    Publication date: April 5, 2012
    Applicant: THE UNIVERSITY OF DUNDEE
    Inventors: Edik Rafailov, Amin Abdolvand, Todor Kalkandjiev