Skew Mirrors, Methods of Use, and Methods Of Manufacture

A display system comprising:

• a waveguide;
• a grating medium on the waveguide;
• a diffractive grating structure in the grating medium;
• and
• optical components configured to direct first light onto a location of the grating medium at a first internal angle of incidence relative to a surface normal of the grating medium and configured to direct second light onto the location of the grating medium at a second internal angle of incidence relative to the surface normal, wherein
• the diffractive grating structure is configured to diffract the first light onto a first internal angle of reflection, the first internal angle of incidence and the first internal angle of reflection being bisected by a first reflective axis that is oriented at a first reflective axis angle relative to the surface normal,
• the diffractive grating structure is configured to diffract the second light onto a second internal angle of reflection, the second internal angle of incidence and the second internal angle of reflection being bisected by a second reflective axis that is oriented at a second reflective axis angle relative to the surface normal, and
• the first and second reflective axis angles are each non-zero relative to the surface normal.

A display system comprising:

• a waveguide configured to propagate light via total internal reflection;
• a grating medium on the waveguide;
• and
• a grating structure on the grating medium, wherein
• the grating structure comprises at least four volume holograms that are overlapping at a specific site of the grating medium, the light being incident upon the specific site of the grating medium,
• the at least four volume holograms are configured to reflect, out of the waveguide, the light incident upon the specific site of the grating medium,
• a first volume hologram of the at least four volume holograms has a first reflective axis oriented at a first non-zero reflective axis angle relative to a surface normal of the grating medium, and
• a second volume hologram of the at least four volume holograms has a second reflective axis oriented at a second non-zero reflective axis angle relative to the surface normal of the grating medium.