Low-obliquity pupil relay for tiltable reflectors

A projector comprising:

• a light source for providing a light beam;
• and
• a beam scanner coupled to the light source for receiving the light beam, the beam scanner comprising:
• a first tiltable reflector for reflecting the light beam at a variable angle in a first plane;
• a second tiltable reflector for reflecting the light beam at a variable angle in a second plane;
• a beam-folded pupil relay for receiving the light beam from the first tiltable reflector and relaying the light beam to the second tiltable reflector, the beam-folded pupil relay comprising:
• a beamsplitter for receiving the light beam reflected by the first tiltable reflector;
• and
• a first curved reflector for receiving the light beam from the beamsplitter, and for reflecting the light beam back towards the beamsplitter, wherein the beam-folded pupil relay beamsplitter is configured to:
• couple the light beam reflected by the first curved reflector to the second tiltable reflector;
• and
• out-couple the light beam reflected by the second tiltable reflector.

A near-eye display for providing an image in angular domain to an eyebox of the near-eye display, the near-eye display comprising:

• a light source for providing a light beam;
• a beam scanner coupled to the light source for receiving the light beam, the beam scanner comprising:
• a first tiltable reflector for reflecting the light beam at a variable angle in a first plane;
• a second tiltable reflector for reflecting the light beam at a variable angle in a second plane;
• a beam-folded pupil relay for receiving the light beam from the first tiltable reflector and relaying the light beam to the second tiltable reflector, the beam-folded pupil relay comprising:
• a beamsplitter for receiving the light beam reflected by the first tiltable reflector;
• a first curved reflector for receiving the light beam from the beamsplitter, and for reflecting the light beam back towards the beamsplitter, wherein the beam-folded pupil relay is configured to couple the light beam reflected by the first curved reflector to the second tiltable reflector;
• and
• a second curved reflector configured to receive the light beam from the beamsplitter after reflection from the first and second tiltable reflectors, and to reflect the light beam to an exit pupil of the beam scanner;
• and
• a pupil-replicating waveguide comprising a polarization-selective input grating for coupling the light beam into the pupil-replicating waveguide, wherein the polarization-selective input grating is disposed proximate the exit pupil of the beam scanner for receiving the light beam reflected by the second curved reflector.