Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 4, 2007
Patent Application Number
11032277
Date Filed
January 10, 2005
Patent Primary Examiner
Patent abstract
Diffraction gratings for coupling an electromagnetic wave into a planar waveguide are disclosed. The diffraction grating may include a first diffraction grating and a second diffraction grating slanted relative to one another. Alternatively, the diffraction grating may include a first diffraction grating and a second diffraction grating spaced apart to form a gap therebetween.
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