Optical point level sensor with lens

Details Optical point level sensor with lens Optical point level sensor with lens

1994-03-03

1995-03-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250903, 73293, G01N 2149, G02B 602

Patent

active

053998766

ABSTRACT:
An optical point level sensor for fluids includes a prism exposable to a fluid such that electromagnetic energy is reflected internally the prism dependent on the fluid level; and a lens optically connectable to an electromagnetic energy source and an electromagnetic energy detector such that electromagnetic energy from the source enters the lens at a first location axisymmetric to a second location where electromagnetic energy exits the lens to the detector. In one embodiment the lens is a GRIN lens.

REFERENCES:
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patent: 4286464 (1981-09-01), Tauber et al.
patent: 4713552 (1987-12-01), Denis et al.
patent: 4853547 (1989-08-01), Bach
patent: 4979797 (1990-12-01), Nemeth
patent: 4998022 (1991-03-01), Tregay
patent: 5149962 (1992-09-01), Maurice
patent: 5159834 (1992-11-01), Eisele
patent: 5278426 (1994-01-01), Barbier

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