Patent ID: 11906736
Assignee: RAYTRX, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 14:
15. A wearable display apparatus having a left-eye optical system and a right-eye optical system, wherein each optical system defines a corresponding exit pupil for a viewer along a view axis and comprises:
an electroluminescent image generator that is energizable to direct image-bearing light for a 2D image from an emissive surface;
a curved reflective surface disposed along the view axis and partially transmissive, wherein the curved reflective surface defines a curved intermediate focal surface;
a beam splitter disposed along the view axis and oriented to reflect light toward the curved reflective surface; and
an optical image relay positioned between the electroluminescent image generator and the beam splitter, and configured to optically conjugate the formed 2D image from the image generator to the curved intermediate focal surface, the optical image relay including:
a right-angle prism having a prism input surface facing toward the emissive surface of the image generator, a prism output surface facing toward the curved intermediate focal plane, and a folding surface extending from the prism input surface to the prism output surface, the folding surface configured to fold an optical path for light generated by the electroluminescent image generator towards the beam splitter, wherein an aperture stop for the relay lies within the prism near the folding surface;
a first plano-aspheric lens in optical contact against the prism input surface and configured to guide the image-bearing light from the electroluminescent image generator toward the folding surface;
a second plano-aspheric lens in optical contact against the prism output surface and configured to direct the light from the folding surface toward the curved intermediate focal surface;
a doublet positioned between the first plano-aspheric lens and the electroluminescent image generator;
a meniscus singlet lens positioned between the doublet and the electroluminescent image generator; and
a concave-plano field lens positioned between the meniscus singlet and the electroluminescent image generator;
wherein the optical image relay, the curved reflective surface, and the beam splitter are configured to form the exit pupil for viewing the generated 2D image superimposed on a portion of a visible object scene.