Substrate mounting for organic, dielectric, optical film
First Claim
1. An optical filter a thermoplastic substrate supporting an organic, dielectric, optical film without substantially reducing the net integrated transmission properties of the film along an optical path comprising:
- a dielectric film including (i) repeating optical layers of at least two polymers having different refractive indexes from each other, (ii) an exterior surface material, (iii) a delamination threshold based on total thermal energy delivered to the film;
a thermoplastic substrate which is miscible with the exterior surface material of the film and which is disposed in the same optical path as said dielectric film; and
a polydisperse region comprising a mixture of said exterior surface material and said thermoplastic substrate located in the optical path between said film and said substrate, wherein said polydisperse region providing improved optical transmission along the optical path in the transition from said film to said thermoplastic substrate.
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Abstract
A method for optically coupling a thermoplastic material to an outer surface layer of an organic, dielectric, optical film and the resulting optical filter. Initially, a dielectric film is selected that includes (i) repeating optical layers of at least two polymers having different refractive indexes from each other, (ii) an exterior film surface, (iii) a refractive boundary along the exterior film surface, and (iv) a delamination threshold based on total thermal energy delivered to the film. A thermoplastic material which is miscible with the exterior film surface is fused to the refractive boundary with thermal energy below the delamination threshold to form a polydisperse region having a higher optical transmission than the refractive boundary. Add-on filters in the form of hardcoat layers, anti-reflection layers, holograms, metal dielectric stacks and combinations of these may be combined with the thermoplastic-film construct.
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Citations
33 Claims
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1. An optical filter a thermoplastic substrate supporting an organic, dielectric, optical film without substantially reducing the net integrated transmission properties of the film along an optical path comprising:
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a dielectric film including (i) repeating optical layers of at least two polymers having different refractive indexes from each other, (ii) an exterior surface material, (iii) a delamination threshold based on total thermal energy delivered to the film;
a thermoplastic substrate which is miscible with the exterior surface material of the film and which is disposed in the same optical path as said dielectric film; and
a polydisperse region comprising a mixture of said exterior surface material and said thermoplastic substrate located in the optical path between said film and said substrate, wherein said polydisperse region providing improved optical transmission along the optical path in the transition from said film to said thermoplastic substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification