Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1982-05-17
1984-08-28
Swisher, S. Clement
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
340619, 350 9615, 73293, G01F 2322
Patent
active
044685670
ABSTRACT:
A liquid level detecting device, which has a low transmission loss and may be miniaturized, comprising a plurality of optical fibers each composed of a core made of a transparent material and a cladding layer covering the core therewith and made of another transparent material having a lower refractive index than that of the former transparent material forming the core, end portions of the optical fibers being placed in adjacent to each other in either parallel arrangement or that attained by making an acute angle with each other, and a detecting portion which is obtained by heating the adjacent end portions of these optical fibers to fuse one another and shaping into a spherical form due to the surface tension of the fused material.
REFERENCES:
patent: 3995169 (1976-11-01), Oddon
patent: 4155013 (1979-05-01), Spiteri
patent: 4256365 (1981-03-01), Lemesle et al.
patent: 4287427 (1981-09-01), Scifres
patent: 4289398 (1981-09-01), Robichaud
"Low-Loss Y-Coupler for Multimode Single Fibers", 12-1978, Electronics Letters, vol. 14, No. 25, pp. 808-809, Fiorina et al.
Kowata Nobuo
Sasano Naoshige
Noland Tom
Showa Electric Wire & Cable Co. Ltd.
Swisher S. Clement
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