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Reflective polarizers containing polymer fibers

  • US 7,526,164 B2
  • Filed: 03/18/2008
  • Issued: 04/28/2009
  • Est. Priority Date: 02/28/2005
  • Status: Expired due to Fees
First Claim
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1. An optical body, comprising:

  • a polymer matrix; and

    a plurality of polymer fibers disposed within the polymer matrix and oriented substantially parallel to a first axis of the matrix, wherein at least one of the polymer fibers comprises a first polymer material and a second polymer material, the first and second polymer materials not miscible with each other and at least one of the polymer materials being birefringent, the at least one fiber having elongated internal multiple birefringent interfaces for reflecting light, the elongated birefringent interfaces formed between the first polymer material and the second polymer material, wherein a refractive index difference at the birefringent interfaces for light polarized parallel to the first axis is different from a refractive index difference at the birefringent interfaces for light polarized parallel to a second axis, the second axis orthogonal to the first axis.

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