The patent's assignee for patent number 8618484 is
News editors obtained the following quote from the background information supplied by the inventors: "It is known that different substrates absorb different, specific bands of IR (infrared) radiation. Thus, by directing IR radiation towards a thin film of the substrate it is possible to determine the thickness of the film. By a radiometric analysis it is further possible to determine the proportion of ingredients in the substrate and by continuous monitoring it is possible to establish changes of said proportion. Radiometric analysis is based on the change of energy or absorption of radiation, which in this case has wave-lengths within the IR area.
"In many applications it is important to be able to control the thickness of a fluid film and the amount of different ingredients of the fluid film. This control could be used to optimize the desired effect, reduce the amount of used fluid and thereby save costs. In many instances it is normal to use superfluous amounts of a fluid, to be on the safe side. Controlling and monitoring the actual amount of fluid and its ingredients may diminish such superfluous amounts."
As a supplement to the background information on this patent, VerticalNews correspondents also obtained the inventor's summary information for this patent: "The apparatus of the invention is designed to control and monitor fluid films using absorption of radiation having wavelengths within the IR area. This is done by using the main or other absorption bands of a fluid to be measured and using the change of energy when the radiation passes through a thin fluid film.
"The apparatus of the invention may be used for measurement and control of any thin fluid film. Different applications include but are not limited to: printing ink and fountain solution in printing presses; oil films often used in pressing of sheet metal; coatings on paper or metal; and photographic films on substrates within the semiconductor industry.
"One object of the present invention is to provide an apparatus that is relatively compact and, thus, easy to install in different environments. In many situations it is an advantage if it could be used as a part of a modular system.
"According to the invention an apparatus for radiometric measurement of thin fluid films is provided. The apparatus has a housing enclosing means of radiation, a radiation guide, a reflector and one or more detectors.
"Further objects and advantages of the present invention will be obvious to a person skilled in the art reading the detailed description below of different embodiments."
For additional information on this patent, see: Cronvall, Leif. Fluid Film Indicator. U.S. Patent Number 8618484, filed
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