High efficiency optical devices
First Claim
1. An optical device comprising at least two opposing optical surfaces,wherein each of the optical surfaces comprises a reflective multilayer polymeric film that transmits less than 2% of perpendicularly incident light of at least one polarization orientation over an intended bandwidth, and further wherein the optical device absorbs less than about 10% of the incident light after five reflections from the multilayer film of the at least two opposing optical surfaces.
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Accused Products
Abstract
Optical devices such as light pipes which incorporate multilayer optical films in which the refractive indices of two adjacent layers in the thickness direction are substantially matched or are small relative to the difference in refractive indices of said two adjacent layers in an given in-plane direction which is at least 0.05. The multilayer optical film exhibits low absorptivity and can reflect light approaching at shallow angles as well as normal to the film.
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Citations
25 Claims
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1. An optical device comprising at least two opposing optical surfaces,
wherein each of the optical surfaces comprises a reflective multilayer polymeric film that transmits less than 2% of perpendicularly incident light of at least one polarization orientation over an intended bandwidth, and further wherein the optical device absorbs less than about 10% of the incident light after five reflections from the multilayer film of the at least two opposing optical surfaces.
- 8. An optical device comprising a body having at least two opposing optical surfaces, at least a portion of each of the optical surfaces comprising a reflective film that reflects perpendicularly incident light of at least one polarization orientation over an intended bandwidth, wherein the reflective film of each of the optical surfaces comprises a plurality of layers, and further wherein at least one layer of the plurality of layers is birefringent.
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18. An optical device comprising:
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a plurality of diverging wedges, each diverging wedge of the plurality of diverging wedges comprising two opposing optical surfaces, wherein each of the optical surfaces comprise a multilayer optical film, wherein the multilayer optical film comprises a plurality of layers, and further wherein at least one layer of the plurality of layers is birefringent. - View Dependent Claims (19, 20)
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21. A decorative article comprising:
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a plurality of diverging wedges, each diverging wedge of the plurality of diverging wedges comprising two opposing optical surfaces, wherein each of the optical surfaces comprise a multilayer optical film, wherein the multilayer optical film comprises a plurality of layers, and further wherein at least one layer of the plurality of layers is birefringent. - View Dependent Claims (22, 23, 24, 25)
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Specification