Planar type lens manufacturing method

Abstract

A sure and efficient manufacturing method of a translucent type screen using micro glass beadsis probided. A carbon toner is scattered onto micro glass beads which are buried and fixed in a UV curable resin layer, and the carbon toner is uniformly filled in the gaps between the micro glass beads by a rotating brush or a press roll or the like. The supply and filling of the carbon toner may be simultaneously performed by an air jet nozzle. Subsequently, an extra fine fiber cloth, sticky tape, sticky roll or the like is continuously brought into contact with the upper surface of the carbon toner to remove the carbon toner at the light emission portion of the micro glass beads.

What is claimed is:  
     
         1 . A planar type lens manufacturing method comprising: 
 a step of forming a transparent sticky layer on a transparent base;    a step of supplying plural transparent fine spheres onto said transparent sticky layer;    a step of burying said plural transparent fine spheres in said transparent sticky layer in a depth which is substantially equal to the half of the diameter thereof;    a step of supplying colored material so that said colored material is filled in at least the gaps between said plural transparent fine spheres; and    a step of removing said colored material located at at least light-transmissible positions of the opposite side to said transparent base.    
     
     
         2 . The planar type lens manufacturing method as claimed in    claim 1   , wherein carbon toner is used as said colored material.  
     
     
         3 . The planar type lens manufacturing method as claimed in    claim 2   , wherein said carbon toner using cellulose acetate as binder is used.  
     
     
         4 . The planar type lens manufacturing method as claimed in    claim 2   , wherein said carbon toner has a particle diameter of 0.05 to 15 μm.  
     
     
         5 . The planar type lens manufacturing method as claimed in    claim 4   , wherein in said step of supplying said colored material, after carbon toner having a relatively large particle size is supplied, carbon toner having a small particle size is supplied between the carbon toner having the relatively large particle size.  
     
     
         6 . The planar type lens manufacturing method as claimed in    claim 2   , wherein in said step of supplying said colored material, after said carbon toner is scattered, said carbon toner is buried in the gaps between said plural transparent fine spheres by a rotating brush.  
     
     
         7 . The planar tape lens manufacturing method as claimed in    claim 2   , wherein in said step of supplying said colored material, after said carbon toner is scattered, said carbon toner is buried in the gaps between said plural transparent fine spheres by a pressure roller.  
     
     
         8 . The planar type lens manufacturing method as claimed in    claim 2   , wherein in said step of supplying said colored material, said carbon toner is sprayed by an air jet nozzle to be buried into the gaps between said plural transparent fine spheres.  
     
     
         9 . The planar type lens manufacturing method as claimed in    claim 2   , wherein in said step of removing said colored material, said colored material is removed by making said carbon toner adhere to extra fine fiber cloth.  
     
     
         10 . The planar type lens manufacturing method as in    claim 2   , wherein in said step of removing said material, said colored material is removed by making said carbon toner adhere to an adhesive roll.  
     
     
         11 . The planar type lens manufacturing method as claimed in    claim 2   , wherein in said step of removing said colored material, said colored material is removed by making said carbon toner adhere to an adhesive plane of an adhesive tape.  
     
     
         12 . The planar type lens manufacturing method as claimed in    claim 1   , further comprising a step of laminating a second transparent base through a second transparent sticky layer on said plural transparent fine spheres after said step of removing said colored material.