Patent ID: 11131858

Abstract:
A low-height projector assembly includes a biconvex lens, a converging lens, an aperture stop, and a beam-steerer between the biconvex lens and the converging lens. The biconvex lens has a principal plane, a focal length, and a first optical axis. The converging lens has a second optical axis laterally offset from the first. The beam-steerer is configured to steer light from the biconvex lens to the converging lens. An aperture-stop plane intersects the second optical axis and the aperture stop. On the second optical axis, at least one of a front surface and a back surface of the converging lens is between the aperture-stop plane and the beam-steerer. The axial chief ray's propagation distance from the principal plane to the aperture stop differs from the focal length by less than half the depth of focus of the biconvex lens.