Abstract: A wearable display system includes one or more emissive micro-displays, e.g., micro-LED displays. The micro-displays may be monochrome micro-displays or full-color micro-displays. The micro-displays may include arrays of light emitters. Light collimators may be utilized to narrow the angular emission profile of light emitted by the light emitters. Where a plurality of emissive micro-displays is utilized, the micro-displays may be positioned at different sides of an optical combiner, e.g., an X-cube prism which receives light rays from different micro-displays and outputs the light rays from the same face of the cube. The optical combiner directs the light to projection optics, which outputs the light to an eyepiece that relays the light to a user's eye. The eyepiece may output the light to the user's eye with different amounts of wavefront divergence, to place virtual content on different depth planes.

Abstract: Very high refractive index (n>2.2) lightguide substrates enable the production of 70° field of view eyepieces with all three color primaries in a single eyepiece layer. Disclosed herein are viewing optics assembly architectures that make use of such eyepieces to reduce size and cost, simplifying manufacturing and assembly, and better-accommodating novel microdisplay designs.

Abstract: Composite particles comprising a hydrophobic dye and an amphiphilic block copolymer encapsulating the dye are disclosed. The dye exhibits absorbance peaks at one or more points in the ultraviolet, visible, or infrared regions of the electromagnetic spectrum. The particles are thus useful in optical applications, such as the preparation of contact lenses that screen out harmful radiation. In select embodiments, the dye is Zinc (II) 5, 10, 15, 20-(tetraphenyl) porphyrin and the copolymer is an acrylate or PEO copolymer that has been crosslinked.

Abstract: A vaccine composition is provided which comprises a rag nucleic acid sequence for the prevention and/or treatment of infection by P. gingivalis. Uses of such nucleic acid sequences, proteins coded for by such sequences and antibodies raised against such proteins in medicine are also provided. Kits for the detection of P. gingivalis in a sample are also provided.