Method for making glass nonfogging

Details Method for making glass nonfogging Method for making glass nonfogging

1978-07-13

1979-09-25

Miller, J. D.

Electricity: electrical systems and devices

Electric charging of objects or materials

361233, 307400, 361320, H01G 702

Patent

active

041692802

ABSTRACT:
A method for rendering glass nonfogging (to condensation fog) by sandwiching the glass between two electrodes such that the glass functions as the dielectric of a capacitor, a large alternating current (AC) voltage is applied across the electrodes for a selected time period causing the glass to absorb a charge, and the electrodes are removed. The glass absorbs a charge from the electrodes rendering it nonfogging. The glass surface is undamaged by application of the AC voltage, and normal optical properties are unaffected. This method can be applied to optical surfaces such as lenses, auto windshields, mirrors, etc., wherever condensation fog on glass is a problem.

REFERENCES:
patent: 2538554 (1951-01-01), Cherry, Jr.
patent: 3365633 (1968-01-01), Anderson
Gutmann, F; "The Electret," Reviews of Modern Physics, vol. 20, No. 3, pp. 457-472.

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