Apparatus for measuring the refractive index of an optical fiber

Details Apparatus for measuring the refractive index of an optical fiber Apparatus for measuring the refractive index of an optical fiber

1983-11-09

1986-02-25

McGraw, Vincent P.

Optics: measuring and testing

For optical fiber or waveguide inspection

356128, G01N 2141, G01N 2184

Patent

active

045726655

ABSTRACT:
The apparatus described basically includes a vessel (10) which has a horizontal transparent window (11) and contains an index liquid (12). An optical fiber (13) is mounted in this vessel perpendicular to the window (11). Light (14) is launched and focused by a condenser (15) onto fiber (13). The light cone of aperture angle (2.beta.) due to the guided and leaky modes is eliminated using an annular mirror (16) that reflects the remaining portion of the aperture light cone (2.alpha.) escaping laterally from the fiber. This light reflected by the mirror (16) is focused by an annular condenser (18) and reflected onto a detector (20) by a flat mirror (19) with a hole in the center. Measuring the amount of light received by the detector (20) allows the refractive index of the fiber to be determined.

REFERENCES:
patent: 4468118 (1984-08-01), Bice
Saunders, "Optical Fiber Profiles Using the Refracted Near-Field Technique; A Comparison with Other Methods", Applied Optics, vol. 20, No. 9, May 1981, pp. 1645-1651.

Affiliated with

Also associated with

Rating

Apparatus for measuring the refractive index of an optical fiber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for measuring the refractive index of an optical fiber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for measuring the refractive index of an optical fiber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1011383