Method of making light polarizer
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United States of America Patent
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May 27, 1986
Grant Date -
N/A
app pub date -
Jan 25, 1985
filing date -
Jan 25, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is described a method for making visible range dichroic polarizer material comprising a uniaxially stretched film of polyvinyl alcohol stained with iodine and treated with a borating solution containing a zinc salt. The method comprises the steps of staining a uniaxially stretched sheet of polyvinyl alcohol and further stretching the stained sheet while it is being treated with a borating solution containing a zinc salt. High efficiency visible range dichroic polarizer elements having good neutrality, very high extinction and high transmittance can be made according to the method.
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