Waveguide Device with Uniform Output Illumination

A color waveguide device comprising:

• at least two optical substrates stacked upon each other;
• at least one light source;
• at least one light coupler capable of coupling incident light from the light source with an angular bandwidth into a total internal reflection (TIR) within the at least one optical substrate such that a unique TIR angle is defined by each light incidence angle as determined at the input grating;
• at least one light extractor for extracting the light from the optical substrate;
• and
• at least two input stops, each input stop is within a different optical substrate, each in a different plane, wherein each input stop includes an outer dichroic portion to shift pupil and mitigate color banding.

A method to mitigate banding in an output illumination of a waveguide device, comprising:

• producing incident light from a light source;
• passing the incident light through a light coupler to couple the incident light into an optical substrate such that the coupled light undergoes total internal reflection (TIR) within the optical substrate;
• and
• extracting the TIR light from the optical substrate via a light extractor to produce the output illumination;
• wherein the light passes through a debanding optic of the waveguide device such that the debanding optic mitigates a banding effect of the output illumination.