Patent ID: 8391668

Claim:
A display system, comprising: a photonics module to generate an image as an output light; and a substrate guided relay to receive the output light from the photonics module as an input light to generate multiple copies of input light from and to homogenize the input light, the substrate guided relay comprising: a slab guide having a first surface, a first end, a second end, and a first edge, wherein the slab guide has an absorbing edge disposed at the first end; an input coupler disposed on the first surface of the slab guide at the first end of the slab guide and at an angle with respect to the first edge of the slab guide; an output coupler disposed on the first surface of the slab guide at the second end of the slab guide; and an exit pupil module to receive the output light from the photonics module to alter an exit pupil of the input light provided to the substrate guided relay to cause the exit pupil to be suitable for a pupil of a user; wherein light rays that enter the slab guide via the input coupler toward the first end are absorbed by the absorbing edge and light rays that enter the slab guide via the input coupler toward the output coupler exit the slab guide via the output coupler.