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US 2011/0085241 A1Published application
Transmissive optical microstructure substrates that produce visible patterns
OwnerKen G. Purchase, Robert M. Soule, IIIinventors
Life of this patent
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Abstract
A light transmissive structure such as a light diffuser includes a substrate having optical microstructures. The optical microstructures include at least one feature that varies across the substrate, so as to produce a visible indicia relative to a viewer of the light transmissive structure. Related diffusers and methods of fabrication are also described.
Claims26
A light diffuser comprising:
- a substrate including a plurality of diffusing optical microstructures therein and/or thereon, the plurality of diffusing optical microstructures including at least one feature that varies across the substrate so as to produce a visible indicia relative to a viewer of the light diffuser.
A light transmissive structure comprising:
- a substrate including a plurality of optical microstructures therein and/or thereon, the plurality of optical microstructures including at least one feature that varies across the substrate so as to produce a visible indicia relative to a viewer of the light transmissive structure.
A method of fabricating a light transmissive structure comprising:
- imaging into a photoimageable material an image of a plurality of optical microstructures that include at least one feature that varies across the plurality of optical microstructures;
- and
- using the photoimageable material that was imaged to replicate a plurality of optical microstructures in and/or on a substrate, the plurality of optical microstructures also including at least one feature that varies across the substrate so as to produce a visible indicia relative to a viewer of the light transmissive structure.
Dependencies are inferred from the claim text.