Projection system with collimating scanning mirror

An augmented reality device, comprising:

• an optically transparent eyepiece configured to project light into a user's eye, the optically transparent eyepiece comprising an input coupling grating configured to receive light;
• a scanning mirror configured to rotate about two or more different axes of rotation;
• an optical element;
• and
• a plurality of optical fibers, each optical fiber of the plurality of optical fibers having a light emitting end disposed between the input coupling grating and the scanning mirror and oriented such that light emitted from the light emitting end is refracted through at least a portion of the optical element, reflected off the scanning mirror, refracted back through the optical element and into the input coupling grating.

A method for operating a display assembly having an input coupling grating, an optical element, and a scanning mirror, the method comprising:

• emitting imagewise modulated light from an optical fiber;
• refracting the emitted imagewise modulated light through at least a portion of the optical element to provide an input beam;
• reflecting the input beam off the scanning mirror to provide a scanned beam;
• refracting the scanned beam through the at least a portion of the optical element to provide refracted input light;
• and
• coupling the refracted input light into the input coupling grating.