Method for making glass nonfogging

Patent · 01 January 1979

OSTI ID:863429

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

---

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
• 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

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