Optical thickness detecting and comparing method and apparatus
Detecting optical fiber defects
Method and apparatus for determining ratio of core radius to cladding radius in clad optical fibers
Method for monitoring the properties of plastic coatings on optical fibers Patent #: 4042723
ApplicationNo. 05/865977 filed on 12/30/1977
US Classes:356/73.1, FOR OPTICAL FIBER OR WAVEGUIDE INSPECTION356/239.2Optical element (e.g., contact lens, prism, filter, lens, etc.)
ExaminersPrimary: McGraw, Vincent P.
Attorney, Agent or Firm
International ClassesG01N 21/88 (20060101)
G01M 11/00 (20060101)
AbstractA sensitive, nondestructive method of viewing the internal structure of multilayered optical fiber preforms is described. The method comprises the steps of transversely illuminating the preform, and intercepting the light that traverses the preform on a viewing screen. To obtain a complete picture, the preform is rotated 360 degrees about its axis. The technique provides a detailed view of the core size and eccentricity, and of the structure of the multilayered core.
Field of SearchFOR OPTICAL FIBER OR WAVEGUIDE INSPECTION