MUMBAI, India, Feb. 13 -- Intellectual Property India has published a patent application (202521133006 A) filed by Dr Raunak Kumar Tamrakar; Chandra Sheker Robinson; and Dr Kanchan Upadhyay, Durg, Chattisgarh, on Dec. 29, 2025, for 'a mechanically stabilized system for determining numerical aperture of optical fibers.'
Inventor(s) include Dr Raunak Kumar Tamrakar; Chandra Sheker Robinson; and Dr Kanchan Upadhyay.
The application for the patent was published on Feb. 13, under issue no. 07/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to an improved apparatus and method for determining the numerical aperture of an optical fiber by measuring the acceptance angle and the spatial distribution of light emerging from the fiber end. The invention utilizes a mechanically stabilized fiber holding fixture, a precision screw-driven alignment mechanism, and an optical measurement arrangement that enables accurate determination of the radius of the illuminated circular spot formed on a screen positioned at a known distance from the fiber tip. By correlating the measured spot radius and the fiber-to-screen separation, the numerical aperture of the optical fiber is calculated with improved accuracy and repeatability. The system minimizes alignment errors, ensures stable fiber positioning, and provides a reliable experimental framework suitable for optical characterization, education, and fiber-optic component testing."
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