Method of making light polarizer

Details Method of making light polarizer Method of making light polarizer

1985-01-25

1986-05-27

Hoffman, James R.

Coating processes

Optical element produced

Polarizer, windshield, optical fiber, projection screen, or...

427160, B05D 506, G02B 530

Patent

active

045915121

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.

REFERENCES:
patent: 4166871 (1979-09-01), Schuler
Racich et al., "High Efficiency Polarizers for the Visible Region", Proceedings of SPIE, vol. 464, Jan. 26-27, 1984.

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