Publication: High performance Feussner-type polarizers based on stretched poly(ethylene-terephthalate) films
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2002-03-11
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Amer Inst Physics
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Abstract
Stretched poly(ethylene-terephthalate) films appear to be an interesting optical plastic for use in polarization control devices. By means of stretching ratios its birefringence, in practice, can be tailored from ∼0 to ∼0.17. It has a very wide transmission window (∼0.32–5.70 μm) and good thermal, mechanical, and chemical properties. We propose using it for polarizers based on the Feussner design. By implementing this configuration with a biaxially stretched film, we have obtained a polarizer with an achromatic extinction ratio better than 1 part in 50 000. This is comparable with conventional Glan–Thompson polarizers but with additional advantages. The principal refractive indices of the film (in the 0.43–5.7 μm range) and the operational range of the polarizer presented are also provided.
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© American Institute of Physics.
This work was financially support by the Universidad Complutense Madrid (PR48/01-9883) and by the Comunidad de Madrid (07N/0039/1998), Spain.
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