Method for making glass nonfogging

Patent · Mon Jan 01 00:00:00 EST 1979

OSTI ID:863429

Lord, David E ^[1]; Carter, Gary W ^[1]; Petrini, Richard R ^[1]

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1. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4169280
• OSTI ID: 863429
• Country of Publication: United States
• Language: English

Related Subjects

method
glass
nonfogging
rendering
condensation
fog
sandwiching
electrodes
functions
dielectric
capacitor
alternating
current
voltage
applied
selected
time
period
causing
absorb
charge
removed
absorbs
surface
undamaged
application
normal
optical
properties
unaffected
surfaces
lenses
auto
windshields
mirrors
etc
wherever
selected time
glass surface
time period
alternating current
optical properties
optical surfaces
optical surface
glass nonfogging
/361/307/