IMPROVEMENTS IN OR RELATING TO AUGMENTED REALITY DISPLAY UNITS AND AUGMENTED REALITY HEADSETS COMPRISING THE SAME

• Main Authors: JACOBY, Thomas Norman Llyn, HORROCKS, Simon Peter, STEVENS, Robert Edward, EDGINTON, Alex
• Format: Patent
• Language: English; French; German
• Published: 24.01.2024
• Subjects: CONTACT LENSES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES

An augmented reality display unit for use in an augmented reality headset or the like comprising front and rear variable focusing power compression liquid lens assemblies (220, 230) in mutual optical alignment on an optical axis (O), a transparent waveguide display(240) interposed between the front and rear liquid lens assemblies (220, 230) and a selectively operable adjustment mechanism for simultaneously adjusting the focusing powers of the front and rear compression liquid lens assemblies (220, 230) in a mutually inverse manner; wherein each of the front and rear compression liquid lens assemblies stores elastic potential energy as its absolute focusing power is increased and releases elastic potential energy as its absolute focusing power is decreased; and wherein the adjustment mechanism is configured to couple the front and rear compression liquid lens assemblies together such that elastic potential energy released by one of the compression liquid lens assemblies as its absolute focusing power is decreased assists in driving the adjustment mechanism to increase the absolute focusing power of the other compression liquid lens assembly.