Separation of simultaneous events in a laser firing unit using a

Details Separation of simultaneous events in a laser firing unit using a Separation of simultaneous events in a laser firing unit using a

1988-08-26

1993-11-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 731, 25022717, H01J 516, H01J 4014, G01N 2100

Patent

active

052605655

ABSTRACT:
An apparatus (10) and method for testing the continuity of two optical fibers (12, 14) nonsimultaneously utilizing a single optical path. Two test light beams from a dual hybrid laser (30) are collimated and directed down a single optical path time-sequentially. The two light beams are linearly polarized in orthogonal planes. A quarter wave plate (42) converts the linearly polarized light into circularly polarized light, and an optical sequencer (22) directs the circularly polarized beams to a plurality of desired optical paths, each path comprising one or two optical fibers (12, 14). A second quarter wave plate (50) converts the circularly polarized light back into linearly polarized light, and a polarizing beamsplitter (24) reflects one of the beams and transmits the other. The two beams then enter the optical fibers (12, 14), where they are reflected by dichroic mirrors (26, 28) at the opposite end of the fibers (12, 14). The reflected beams retrace the original optical paths until they are reflected by a beamsplitter (38) which directs the beams onto a photodetector (58 ). The intensity of the light pulse detected by the photodetector (58) will indicate the continuity of the fibers (12, 14). Using this invention, measurements of the continuity of the two fibers (12, 14) can be made separately, resulting in increased sensitivity over methods which measure the two fibers (12, 14) simultaneously.

REFERENCES:
patent: 4560867 (1985-12-01), Papuchon et al.
patent: 4564289 (1986-01-01), Spillman, Jr.
patent: 4682024 (1987-07-01), Halldorsson et al.

Affiliated with

Also associated with

Rating

Separation of simultaneous events in a laser firing unit using a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Separation of simultaneous events in a laser firing unit using a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Separation of simultaneous events in a laser firing unit using a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1145061