Optical structures for diffusing light
DCFirst Claim
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1. An optical diffuser comprising a polymerized material layer on a transparent or translucent substrate, which layer has a highly modulated surface having smooth bumps ranging from about 1 micron to about 20 microns in both height and width.
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Abstract
Optical diffusing structures can be fabricated from photopolymerizable material by directing light through a transparent or translucent substrate and then through the photopolymerizable material for a period of time sufficient to photopolymerize only a portion of the material. The resultant structure can be utilized as a diffuser, a viewing screen, and in other applications, and can be combined with other light-directing structures such as arrays of tapered optical waveguides.
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14 Claims
- 1. An optical diffuser comprising a polymerized material layer on a transparent or translucent substrate, which layer has a highly modulated surface having smooth bumps ranging from about 1 micron to about 20 microns in both height and width.
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14. An optical diffuser comprising a polymerized material layer on a transparent or translucent substrate, which layer has a highly modulated surface having smoother bumps ranging from about 1 micron to about 20 microns in both height and width, wherein the polymerized material layer is formed by photopolymerizing a composition which comprises at least one photopolymerizable monomer or oligomer, and a photoinitiator, and the substrate comprises at least one material selected from the group consisting of amorphous materials, semi-crystalline materials having crystalline domains interspersed in an amorphous matrix, purely crystalline materials and combinations thereof.
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