Optical waveguide with prism coupler for parallel light
First Claim
1. Means for coupling achromatic light having wavelengths within a given range to or from an optical waveguide along a path parallel with the waveguide, comprisingan optical waveguide film on a substrate, anda prism having a base on said waveguide film and having a face positioned in said path and at an angle θ
- with said base, said prism being made of a material having a refractive index np which is higher than the refractive index ng of the waveguide, and having a dispersive behavior substantially equal to the dispersive behavior of the material of the waveguide film.
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Accused Products
Abstract
Couplers for coupling achromatic light having wavelengths of blue through red to and from an optical film waveguide along collinear paths parallel with the waveguide. Each coupler is constituted by a prism made of a material which, over the range of wavelengths of interest, has a change in refractive index which differs from the change in refractive index of the waveguide film by less than 0.5 percent of the refractive index of the prism material.
27 Citations
4 Claims
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1. Means for coupling achromatic light having wavelengths within a given range to or from an optical waveguide along a path parallel with the waveguide, comprising
an optical waveguide film on a substrate, and a prism having a base on said waveguide film and having a face positioned in said path and at an angle θ - with said base, said prism being made of a material having a refractive index np which is higher than the refractive index ng of the waveguide, and having a dispersive behavior substantially equal to the dispersive behavior of the material of the waveguide film.
- View Dependent Claims (2, 3, 4)
Specification