Enhanced K-type polarizer

Abstract

An enhanced K-type polarizer includes a molecularly oriented sheet of polyvinylalcohol/polyvinylene block copolymer material having polyvinylene blocks formed by molecular dehydration of a sheet of polyvinylalcohol wherein the molecularly oriented sheet comprises light-polarizing molecules of polyvinylalcohol/polyvinylene block copolymer material varying in length, n, of conjugated repeating vinylene unit of the polyvinylene block, wherein an absorption concentration of each of the polyvinylene blocks in the range of n=19 to 25 is not less than approximately 65% of the absorption concentration of any of the polyvinylene blocks in the range of n=14 or 15, wherein the absorption concentration is determined by absorption of wavelengths from about 200 nm to about 700 nm by the polyvinylene blocks, and wherein the molecularly oriented sheet exhibits a photopic dichroic ratio, R D , of at least approximately 75.

1 . A light polarizer comprising: 
 a molecularly oriented sheet of polyvinylalcohol/polyvinylene block copolymer material having polyvinylene blocks formed by molecular dehydration of a sheet of polyvinylalcohol wherein the molecularly oriented sheet comprises light-polarizing molecules of polyvinylalcohol/polyvinylene block copolymer material varying in length, n, of conjugated repeating vinylene unit of the polyvinylene block, wherein an absorption concentration of each of the polyvinylene blocks in the range of n=19 to 25 is not less than approximately 65% of the absorption concentration of any of the polyvinylene blocks in the range of n=14 or 15, wherein the absorption concentration is determined by absorption of wavelengths from about 200 nm to about 700 nm by the polyvinylene blocks, and wherein the molecularly oriented sheet exhibits a photopic dichroic ratio, R D , of at least approximately 75.    
     
     
         2 . The polarizer of  claim 1  further comprising a dichroic dye.  
     
     
         3 . The polarizer of  claim 2 , wherein the dichroic dye is a yellow dye, a blue dye, or a combination thereof.  
     
     
         4 . The polarizer of  claim 1 , wherein a portion of the molecularly oriented sheet further comprises a moisture-resistance imparting complex of the polyvinyl alcohol/polyvinylene block copolymer and boric acid.  
     
     
         5 . The polarizer of  claim 1 , wherein a portion of the molecularly oriented sheet further comprises a moisture-resistance imparting complex of the polyvinyl alcohol/polyvinylene block copolymer and a borax.  
     
     
         6 . A light polarizer comprising: 
 a molecularly oriented sheet of polyvinylalcohol/polyvinylene block copolymer material having polyvinylene blocks formed by molecular dehydration of a sheet of polyvinylalcohol wherein the molecularly oriented sheet comprises light-polarizing molecules of polyvinylalcohol/polyvinylene block copolymer material varying in length, n, of conjugated repeating vinylene unit of the polyvinylene block, wherein an absorption concentration of the polyvinylene blocks at n=25 is not less than approximately 65% of the absorption concentration of any of the polyvinylene blocks in the range of n=14 or 15, wherein the absorption concentration is determined by absorption of wavelengths from about 200 nm to about 700 m by the polyvinylene blocks, and wherein the molecularly oriented sheet exhibits a photopic dichroic ratio, R D , of at least approximately 75.    
     
     
         7 . The polarizer of  claim 6  further comprising a dichroic dye.  
     
     
         8 . The polarizer of  claim 7 , wherein the dichroic dye is a yellow dye, a blue dye, or a combination thereof.  
     
     
         9 . The polarizer of  claim 6 , wherein a portion of the molecularly oriented sheet further comprises a moisture-resistance imparting complex of the polyvinyl alcohol/polyvinylene block copolymer and boric acid.  
     
     
         10 . The polarizer of  claim 6 , wherein a portion of the molecularly oriented sheet further comprises a moisture-resistance imparting complex of the polyvinyl alcohol/polyvinylene block copolymer and a borax.  
     
     
         11 . A light polarizer comprising: 
 a first polymeric sheet having a first transmission direction; and    a second polymeric sheet having a second transmission direction, wherein the first polymeric sheet and the second polymeric sheet are molecularly oriented sheets of polyvinylalcohol/polyvinylene block copolymer material having the polyvinylene blocks thereof formed by molecular dehydration of a sheet of polyvinylalcohol, wherein the first transmission direction is oriented 90 degrees from the second transmission direction, and wherein the ratio of absorption at 550 nm to absorption at 700 nm is less than approximately 3.75.    
     
     
         12 . The polarizer of  claim 11  further comprising a dichroic dye.  
     
     
         13 . The polarizer of  claim 12 , wherein the dichroic dye is a yellow dye, a blue dye, or a combination thereof.  
     
     
         14 . The polarizer of  claim 11 , wherein the molecularly oriented sheet comprises light-polarizing molecules of polyvinylalcohol/polyvinylene block copolymer material varying in length, n, of conjugated repeating vinylene unit of the polyvinylene block, wherein an absorption concentration of each of the polyvinylene blocks in the range of n=19 to 25 is not less than approximately 65% of the absorption concentration of any of the polyvinylene blocks in the range of n=14 or 15, wherein the absorption concentration is determined by absorption of wavelengths from about 200 nm to about 700 nm by the polyvinylene blocks, and wherein the molecularly oriented sheet exhibits a photopic dichroic ratio, R D , of at least approximately 75.  
     
     
         15 . The polarizer of  claim 11 , wherein the molecularly oriented sheet comprises light-polarizing molecules of polyvinylalcohol/polyvinylene block copolymer material varying in length, n, of conjugated repeating vinylene unit of the polyvinylene block, wherein an absorption concentration of the polyvinylene blocks at n=25 is not less than approximately 65% of the absorption concentration of any of the polyvinylene blocks in the range of n=14 or 15, wherein the absorption concentration is determined by absorption of wavelengths from about 200 nm to about 700 nm by the polyvinylene blocks, and wherein the molecularly oriented sheet exhibits a photopic dichroic ratio, R D , of at least approximately 75.