Patent
1979-09-24
1981-06-23
Corbin, John K.
350 9610, G02B 514, G01N 2185
Patent
active
042747058
ABSTRACT:
Two fiberoptic cables are connected to a transparent hemiellipsoidal optical element at the foci thereof, at the back surface portion of the element. The fiberoptic cables are arranged so that their central axes, if continued into the element, would intersect approximately at the point of tangency on the curved front surface portion of the element with an imaginary plane parallel to the back surface portion. The geometry of the optical element is such that light entering the optical element through one fiberoptic cable is (1) substantially completely internally reflected in the optical element and exits through the other fiberoptic cable when the optical element is submerged in a first medium, and (2) substantially completely transmitted through the optical element into the surrounding medium when the element is in a second medium having a different index of refraction than the first medium.
REFERENCES:
patent: 3120125 (1964-02-01), Vasel
patent: 3886544 (1975-05-01), Narodny
patent: 4069838 (1978-01-01), Hansel et al.
patent: 4082959 (1978-04-01), Nakashima
patent: 4094578 (1978-06-01), DiVita et al.
patent: 4119860 (1978-10-01), Gooley
patent: 4134022 (1979-01-01), Jacobsen
patent: 4156149 (1979-05-01), Vaccari
Lean, "Taps for Multimode Fibers", IBM Tech. Discl. Bull., vol. 21, No. 4, Sep. 1978, p. 1685.
Corbin John K.
Lee John D.
The Boeing Company
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