Polarizing film

Details Polarizing film Polarizing film

1984-12-20

1987-02-17

Corbin, John K.

350398, G02F 113

Patent

active

046435298

ABSTRACT:
Disclosed is a polarizing film containing a base resin and a photodichroic material which is characterized in that (1) the uniaxial orientation coefficient (f) of the principal crystal axis which is a crystal axis parallel to the molecular chain of the base resin, with respect to the reference axis is not less than 0.7 and (2) when a specimen of the polarizing film is cut out so as to have a surface perpendicular to the reference axis and X-rays impinging on the specimen parallel to the reference axis, the product (f.times.R) of the aforesaid uniaxial orientation coefficient (f) and the proportion (R=(I.sub.min /I.sub.max).times.100) of the minimum value (I.sub.min) to the maximum value (I.sub.max) of diffracted X-ray intensity on the resulting Debye-Scherrer ring is not less than 10. This polarizing film has excellent thermal resistance and moisture resistance and gives a high degree of polarization.

REFERENCES:
patent: 4193287 (1980-03-01), Pfeiffer
patent: 4217160 (1980-08-01), Perregaux
patent: 4229498 (1980-10-01), Suzuki et al.
patent: 4387133 (1983-06-01), Ichikawa et al.
patent: 4533214 (1985-08-01), Penz et al.
patent: 4552436 (1985-11-01), Kozaki et al.
patent: 4586790 (1986-05-01), Umeda et al.

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