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LAMINATION OF OPTICAL SUBSTRATES

  • US 20110032618A1
  • Filed: 04/08/2009
  • Published: 02/10/2011
  • Est. Priority Date: 04/14/2008
  • Status: Abandoned Application
First Claim
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1. A method for manufacturing a combiner for a display device, wherein the combiner comprises a flat optical substrate, a cover plate and a grating layer applied to the flat optical substrate or to the cover plate, the method comprising the steps of:

  • (i) applying a predetermined volume of glue to a bonding surface of the optical substrate;

    (ii) applying a plurality of spacer particles of sizes within a predetermined size range onto the bonding surface of the optical substrate;

    (iii) bringing the cover plate into contact with the glue such that the weight of the cover plate causes the glue to spread uniformly over the bonding surface of the flat optical substrate to form said layer of glue and whereupon said cover plate is separated from said flat optical substrate by said plurality of spacer particles; and

    (iv) curing the glue.

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