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Coextruded films consisting of several hundred alternating layers of two or three polymers having different refractive indices have been made. With layer thicknesses of the order of 100nm, these films cause optical interference of light waves and can reflect selected portions of the ultraviolet, visible, and infrared spectrum. All polymeric interference films possess novel properties compared to vacuum deposited dielectric multilayers. Elastomeric film was made which reversibly changes reflected wavelengths with stretching and relaxation. Non-absorbing birefringent interference polarizing film was made using polymers having different stress optical coefficients. A three component nanolayer film that reflects solar infrared wavelengths and transmits visible light was demonstrated.
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Available for Purchase – Conference Proceedings
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Nanolayer Polymeric Optical Films, 1991 Polymers, Laminations & Coatings Conference Proceedings
