| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyvinyl alcohol-base polarizing film excellent in surface smoothness while enhancing light transmittance and the degree of polarization by a high drawing rate. SOLUTION: A polyvinyl alcohol film having 85-150μm thickness is dyed with a dichroic material and drawn 4-7 times to obtain the objective polarizing film having 35-50% light transmittance, >=80% degree of polarization and <=0.04μm center line average surface roughness in a direction perpendicular to the drawing axis. A transparent protective layer optionally subjected to hard coating treatment or anti-glaring treatment is formed on one face or both faces of the polarizing film to obtain the objective polarizing plate. The polarizing film or plate and an optical layer having another optical function are laminated to obtain the objective optical member. The polarizing film is excellent in light transmittance and the degree of polarization and fringes that block visibility are hardly seen even in a reflection mode.
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