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Temperature insensitive polarization filter

  • US 6,510,004 B1
  • Filed: 02/09/1998
  • Issued: 01/21/2003
  • Est. Priority Date: 02/14/1997
  • Status: Expired due to Fees
First Claim
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1. A temperature insensitive polarization filter comprising:

  • at least one first birefringent waveplate having an optical retardance with a negative temperature coefficient; and

    at least one second birefringent waveplate having an optical retardance with a positive temperature coefficient that substantially offsets the change in optical retardance of said first birefringent waveplates over a range of operating temperatures;

    wherein said second birefringent waveplate comprises a polymer.

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