Method and apparatus for reducing non-normal incidence distortion in glazing films
AssigneeRO Technologies, LLC
InventorsStephen S. Wilson, Bart E. Wilson
Life of this patent
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Abstract
A method of manufacturing a polymer film includes melting a resin, extruding the melted resin through a die to produce a polymer film, shaping the polymer film, cooling the polymer film, illuminating a surface with a light source, capturing an image of a shadow cast by the polymer film on the surface while the polymer film is between the light source and the surface, calculating a frequency spectrum of at least a portion of the captured image, and adjusting a process parameter of the melting, the extruding, the shaping, or the cooling based on the frequency spectrum.
Claims22
A method of manufacturing a polymer film, the method comprising:
- melting a resin;
- extruding the melted resin through a die to produce a polymer film;
- shaping the polymer film;
- cooling the polymer film;
- illuminating a surface with a light source;
- capturing an image of a shadow cast by the polymer film on the surface while the polymer film is between the light source and the surface;
- calculating a frequency spectrum of at least a portion of the captured image;
- and
- adjusting a process parameter of the melting, the extruding, the shaping, or the cooling based on the frequency spectrum.
Dependencies are inferred from the claim text.