Optically selective coatings for plant tissues
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United States of America Patent
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Issued Date -
Jan 15, 2009
app pub date -
Jul 12, 2007
filing date -
Jul 12, 2007
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Abstract
The present invention provides optically selective coatings for plant tissues, such as agricultural products. The coatings are designed to transmit a desired spectrum of light, while preventing harmful intensities of radiation in given wavelength ranges from damaging the plant tissues. For example, a coating may be tailored to perform as a low-pass filter preferentially allowing shorter wavelengths to penetrate the coating, a high-pass filter preferentially passing longer wavelengths, or a band-pass filter, preferentially passing visible light to the plant tissues while minimizing the penetration of ultraviolet and infrared light. An exemplary embodiment comprises making an optically selective coating by determining a desired transmission spectrum for the coating, then calculating the film properties (such as thickness, particle size, and/or index of refraction, for example) of one or more materials to obtain the desired transmission spectrum for the film to be applied to the surface to be protected.
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