Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1974-11-08
1976-11-16
Gensler, Paul L.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
340 5MP, 350160LC, G01N 924, G02F 113
Patent
active
039916065
ABSTRACT:
A piezo-optic cell having a nematic liquid crystal film and first and second wedge-shaped plates on opposite surfaces of the film which serve to vary its frequency response along the length of the cell. The cell is illuminated with polarized light and is insonified by an acoustic wave pattern to produce a real-time visual image of the acoustic wave. By exposing the cell to the applied acoustic energy, one or more resonance conditions are created to produce an extremely strong and well defined image.
REFERENCES:
patent: 3597043 (1971-08-01), Dreyer
patent: 3667039 (1972-05-01), Garfein et al.
patent: 3831434 (1974-08-01), Greguss
Ludeman et al., Liquid-Crystal Cell Having Nonuniform Thickness, IBM Tech. Discl., vol. 15, No. 4, Sept. 1972.
Gensler Paul L.
Minnesota Mining and Manufacturing Company
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