Abstract: A reflective polarization volume hologram (rPVH) layer in combination with a quarter wave plate (QWP) is used to provide optical power and to correct chromatic aberration in an optical assembly of an augmented and/or virtual reality (AR/VR) near-eye display device. The rPVH layer introduces more degrees of freedom to further improve contrast of the optical system and reduces a thickness/weight of the optical assembly. The rPVH layer is flexible, thus, allowing curved lamination on an optical lens. Moreover, the rPVH layer is sensitive to circular polarization. Thus, it can filter right-handed circular polarization (RHCP) or left-handed circular polarization (LHCP), without a need for the QWP.

Abstract: An optical grating includes a layer of a liquid crystal polymer, the layer having an internal grating pattern defined by locally polymerized liquid crystal molecules, where a cross-sectional shape of the layer varies across the internal grating pattern.

Abstract: Systems and methods for enabling higher uniform performance and higher voltage operation for micro-OLED displays, manufacturing a meniscus lens including thermo-forming a functional optical layer and printing a lens element over the formed functional optical layer, using a hybrid process used to form a functionalized lens having a controlled surface profile, modeling the polarization properties of a human eye using a polymer thin film, and improving optical sparce eye-tracking by collecting an optical output signal from each detector through a corresponding optical fiber, and determining a gaze direction of a user's eye based on the electrical signal may be disclosed.

Abstract: An optical element includes a waveguide body that is configured to guide light by total internal reflection from an input end to an output end, an input coupling element located at the input end for coupling light into the waveguide body, and an output coupling element located at the output end for coupling light out of the waveguide body, where the waveguide body includes an organic solid crystal. The organic solid crystal may be a single crystal having principal axes rotated with respect to the dimensions of the waveguide body. Such an optical element may have low weight and exhibit good color uniformity while providing polarization scrambling of the guided light.

Abstract: A software patch is generated by determining the binary differences between a more secure version of the embedded system firmware and the currently operating, vulnerable version. The differences are extracted and analyzed to determine their basis in the source code for the more secure version. Source code that affects the binary differences may be compiled into a binary file and linked, off-line, with the binary executable file that contains the machine code for the currently operating version of the embedded system firmware, producing a security patch. The security patch may be installed on the embedded system at run-time, and it is then executed to modify the currently operating firmware to redirect firmware operation from vulnerable procedures toward the new, secure procedures contained in the software patch.