Back to results
US 11,726,332 B2Granted
Diffractive projection apparatus
AssigneesDigiLens Inc., Rockwell Collins, Inc.
InventorsJonathan David Waldern, Milan Momcilo Popovich
Life of this patent
Estimating the term…
Abstract
A light projection apparatus is provided comprising: a source of light; a switchable grating on a first substrate; and a diffractive optical element. Light is diffracted at least once by the switchable grating and is diffracted at least once by the DOE.
Claims22
A waveguide display comprising:
- a light source configured to provide first wavelength amplitude-modulated collimated light in a multiplicity of directions across a field of view (FOV);
- a waveguide supporting:
- a coupler configured to couple light into total internal reflection (TIR) paths in said waveguide;
- at least one switchable grating;
- at least one non-switching grating;
- and
- at least one grating configured to extract light from said waveguide through an exit pupil,
- wherein the light undergoes one diffraction at the switchable grating and one diffraction at the non-switchable grating,
- wherein the switchable grating produces aberrations and distortions while diffracting light, and
- wherein the non-switchable grating is configured to compensate for the aberrations and distortions created by the switchable grating.
7 more elements
Dependencies are inferred from the claim text.