Dichroic Filters On Flexible Polymer Film Substrates

• US 20070247720A1
• Filed: 04/21/2006
• Published: 10/25/2007
• Est. Priority Date: 04/21/2006
• Status: Active Grant

• Current Assignee: Eastman Performance Films, LLC (Eastman Chemical Company)
• Original Assignee: CPFilms Inc. (Eastman Chemical Company)
• Inventors: Yeatts, Janet, Fizzano, Rocco, Barth, Steven, Van Nutt, Charles
• Granted Patent: US 7,317,576 B2
• Time in Patent Office: Days
• US Class Current: 359/634
• CPC Class Codes: G02B 5/285 comprising deposited thin solid films G02B5/281 - G02B5/289 take precedence; multilayered film filters for fibre optic multiplexing G02B6/29361

Abstract

Now, according to the present invention, dichroic filters are provided that incorporate a flexible polymer film substrate, such as poly(ethylene naphthalate), onto which a dielectric and/or reflective metal stack has been formed. Filters of the present invention are durable, flexible, and lightweight, and can be advantageously used in many specialty lighting applications.

Claims

1-22. -22. (canceled)

23. A dichroic filter comprising:

a polymer film substrate comprising poly(ethylene naphthalate);

a stack formed on said polymer film substrate, wherein said stack comprises at least 5 alternating layers of titanium dioxide and silicon dioxide and wherein said dichroic filter transmits only a subset of wavelengths in the visible spectrum of wavelengths.

24. The filter of claim 23, wherein said filter further comprises a polymer film adhered to said stack opposite said polymer film substrate.

25. The filter of claim 24, wherein said polymer film is adhered to said stack with a silicone adhesive.

26. The filter of claim 23, wherein said stack comprises at least 7 alternating layers of said titanium dioxide and said silicon dioxide.

27. The filter of claim 23, wherein said stack comprises at least 11 alternating layers of said titanium dioxide and said silicon dioxide.

28. The filter of claim 23, wherein said layers are from 10 nanometers to 120 nanometers in thickness.

29. The filter of claim 23, further comprising a layer of pressure sensitive adhesive disposed on said polymer film opposite said stack.

30. The filter of claim 29, wherein said adhesive comprises silicone.

31. The filter of claim 29, wherein said adhesive is removable.

32. The filter of claim 29, further comprising a release liner disposed in contact with said pressure sensitive adhesive.

33. The filter of claim 23, wherein said polymer film substrate has a thickness of 0.012 to 0.40 millimeters.

34. The filter of claim 23, wherein said polymer film substrate has a thickness of 0.07 to 0.17 millimeters.

35. The filter of claim 23, wherein said polymer film substrate includes a primer layer.