Optical waveguides – With optical coupler – Particular coupling structure
Patent
1990-10-02
1992-05-26
Lee, John D.
Optical waveguides
With optical coupler
Particular coupling structure
385 33, 385 35, 385 52, G02B 632
Patent
active
051174740
ABSTRACT:
In a device for injecting the light energy of a laser beam into a multimode fibre-optic optical waveguide (2) a small part of the light emerging from the end face of the optical waveguide (2) is projected through a beam splitting cube (7) and a reproducing lens (21) onto a display screen (1), so that an image (24) of the end face of the optical waveguide (2) can be observed on the display screen (1). The arrangement is such that the system is correctly focused only when the distance between the optical waveguide (2) and a focusing point of the laser beam (12) reaches an intended value. The light spot of the laser beam on the end face of the optical waveguide (2) is clearly visible on the display screen (1) so than an optimum positioning and adjustment can be readily effected.
REFERENCES:
patent: 4412720 (1983-11-01), Costa
patent: 4840450 (1989-06-01), Jones et al.
patent: 4886337 (1989-12-01), Raagaard et al.
patent: 4978190 (1990-12-01), Veith
Cornaz, deceased Peter F.
Cornaz, heir Jean-Pierre
Cornaz, heir Maria I.
Cornaz, heir Max M.
van den Bergh Hubert
Barns Stephen W.
Ciba-Geigy Corporation
Falber Harry
Hall Luther A. R.
Lee John D.
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