Adlens Limited

Owen Mumford Limited

Alex Edginton

Robert Edward Stevens

Daniel Paul Rhodes

Roger Brian Minchin Clarke

Benjamin Thomas Tristram Holland

Dijon Pietropinto

Derek Paul Forbes Bean

Peter Lee Crossley

Richard Leefe Douglas Murray

Edwin James Stone

Simon Peter Horrocks

Julian Brandon-Jones

Martyn Francis Kenneally

Benjamin Ian Curnow

Benjamin Thomas Holland

Thomas Norman Llyn Jacoby

Christopher William Hudson

Roger Clarke

Andrew Last

Robert Perkins

Paul Masser

Derek Paul Bean

Roger Brian Clarke

Richard Leefe Murray

Adjustable focal length eyewear () comprising two lenses () that are mounted to a frame () for supporting the lenses () in front of a user's eyes. At least one of the lenses () is a variable focal length lens of the kind comprising two superposed lens elements () having cooperating optical surfaces that are shaped such that the focal length of the variable focal length lens () is variable according to the relative lateral disposition of the lens elements (). One of the lens elements () is fixedly mounted to the frame () and the other lens element () is movable manually relative to the fixed lens element () for varying the focal length of the variable focal length lens (). Guiding parts () are provided on the movable lens element () which cooperate with corresponding guiding parts on the fixed lens element () or the frame () to define and constrain movement of the movable lens element () relative to the fixed lens element () to a transverse path that extends across the viewing direction. One or more releasable fasteners are provided for releasably fastening the movable lens element () to the fixed lens element () or frame () whilst permitting movement of the movable lens element () relative to the fixed lens element () along the transverse path.

Adjustable focal length lenses and eyewear incorporating the same

A method of fabricating a lens element for an adjustable power lens of the kind comprising two lens elements that are slidable relative to one other in a direction transverse the optical axis of the lens and have respective lens surfaces that are shaped to act together to form a corrective lens, the power of which varies according to the relative disposition of the two lens elements, the method comprising the steps of forming a lens puck having two opposite faces, which are shaped to form opposite lens surfaces of one of the lens elements of the adjustable power lens, the puck having at least one alignment feature, and thereafter edging the puck to a desired eye shape with reference to the alignment feature.

Glasses with selectively adjustable optical power lenses

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 () in mutual optical alignment on an optical axis (O), a transparent waveguide display () interposed between the front and rear liquid lens assemblies () and a selectively operable adjustment mechanism for adjusting the focusing powers of the front and rear compression liquid lens assemblies (); wherein each of the front and rear compression liquid lens assemblies () comprises a fluid-filled envelope () having a first wall formed by a distensible elastic membrane () that is held under tension around its edge by a peripheral support ring, a second substantially rigid wall () formed by or supported on an inner surface of a transparent plate or a hard lens of fixed focusing power, and a collapsible side wall (), the membrane forming an optical surface of variable optical power, and the adjustment mechanism being arranged to displace the support ring towards or away from the second wall parallel to the optical axis (O) for increasing or decreasing the pressure of the fluid () within the envelope thereby to cause the membrane to distend or contract respectively parallel to the optical axis for changing the focusing power of the optical surface of the membrane (); wherein the second wall () of the front compression liquid lens () is formed by or supported on a transparent plate or hard lens () which is tilted at a first angle to the optical axis to introduce a first amount of prism to a ray of light passing therethrough, and the second wall () of the rear compression liquid lens is formed by or supported on a transparent plate or hard lens () which is tilted at a second angle to the optical axis to introduce a second amount of prism to a ray of light passing therethrough, wherein the first and second amounts of prism are mutually substantially equal and opposite.

Augmented reality display units and augmented reality headsets comprising the same

A deformable membrane assembly comprises an at least partially flexible fluid-filled envelope, one wall of which is formed by an elastic membrane that is held around its edge by a resiliently bendable supporting ring, a fixed support for the envelope and selectively operable means for causing relative movement between the supporting ring and the support for adjusting the pressure of the fluid in the envelope, thereby to cause the membrane to deform. The bending stiffness of the ring varies round the ring such that upon deformation of the membrane the ring bends variably to control the shape of the membrane to a predefined form. The moving means comprise a plurality of ring-engaging members that are arranged to apply a force to the ring at spaced control points. There are at least three control points, and there is a control point at or proximate each point on the ring where the profile of the ring that is needed to produce the predefined form upon deformation of the membrane exhibits a turning point in the direction of the force applied at the control point between two adjacent points where the profile of the ring exhibits an inflection point or a turning point in the opposite direction.

Deformable non-round membrane assemblies

A deformable membrane assembly comprising a fixed support, a fluid-filled envelope, one wall of which is formed by an elastic membrane that is held under tension around its edge by a flexible membrane supporting member, the supporting member being coupled to the fixed support at a plurality of discrete control points around the supporting member by engaging members for controlling the position of the membrane edge; and an adjuster for adjusting the pressure of the fluid within the envelope to adjust the shape of the membrane; wherein at least three control points are provided that are situated around the membrane edge at spaced locations selected to increase the energy of the lowest order out-of-plane bending mode of the supporting member while allowing the membrane to deform according to one or more selected Zernike polynomials. An article of eyewear comprising such a deformable membrane assembly is also disclosed.

Deformable membrane assemblies

An actuation mechanism for simultaneous actuation of first and second variable focal length lenses is disclosed. Each lens comprises a distensible membrane bounding a fluid-filled cavity, the focal length varying with the degree of curvature of the membrane as it distends. The actuation mechanism comprises a hydraulic master actuator in fluid communication with a hydraulic slave actuator associated with the first lens and with a hydraulic slave actuator associated with the second lens. Each slave actuator is configured to vary the degree of distension of the membrane of its associated lens in response to operation of the master actuator, whereby the master actuator is operable to cause a variation of the degree of distension of the membranes of both the first and second lenses simultaneously.

Eyewear

Actuation of fluid-filled lenses

The present invention provides a deformable membrane assemblycomprising an elastic membranethat is held under tension around its edge by a bendable membrane supporting member, a body of fluid in contact with one face of the membrane, the pressure of the fluid being controllable for adjusting the shape of the membrane, and one or more bending controllersacting on the supporting memberto control the bending of the supporting member in response to loading through tension in the membrane. The bending stiffness of the membrane-supporting membervaries round its extent to control the profile of the edge of the membrane; etc. upon actuation. A variety of different types of bending controllers are disclosed which permit out-of-plane bending of the supporting memberbut prevent or control in-plane bending or deformation of the supporting member. In some embodiments, the bending controllers permit a degree of controlled in-plane bending of the supporting memberin order to control the strain in the membraneupon actuation.

A deformable membrane assembly comprising a fluid-filled envelope, one wall of which is formed by an elastic membrane that is held around its edge by a bendable supporting ring, a support for the envelope and at least three ring-engaging members that are arranged to apply a force to the ring at spaced control points for adjusting the shape of the membrane, with the ring bending to control the shape of the membrane to a predefined form. A control point is provided at or proximate each point on the ring where the profile of the ring that is needed to produce the predefined form of the membrane exhibits a turning point in the direction of the force applied at the control point between two adjacent points where the profile of the ring exhibits an inflection point or a turning point in the opposite direction.

An apparatus for removing a sheath from a syringe. The sheath provides a sterile cover for a needle of the syringe. The apparatus includes a substantially cylindrical housing defining an opening for receiving a sheath attached to a syringe, and a driver mounted on the housing and being slideable along the housing between first and second axially displaced positions. The apparatus further includes a plurality of radially deflectable fingers mounted within the housing and being coupled to the driver for movement therewith. The fingers are configured such that movement of the driver from the first to the second position causes the fingers to slide over the sheath and engage with a formation on the sheath. Movement of the driver from the second position towards the first position causes the fingers to push the sheath off the syringe. Also provided is an injection device including the apparatus.

Syringe cap remover

A sheath remover device is of elongate tubular form having a sheath capture region at one end and a passage along which a captured sheath may pass from the capture region. A plurality of latching fingers, each with an internally directed latch, are equi-spaced in the capture region. Two further inwardly directed latches are on the cut out regions. The sheath remover is designed so that, a sheath already disposed in the sheath capture region is pushed along the passage away from the sheath capture region when the remover is offered up to and engages the subsequent sheath. The spacing of the latches and is such that the earlier sheath is not released from latches until the latches have securely engaged in the subsequent sheath, thereby providing an indication of secure engagement of the subsequent sheath. The sheath remover may also be used as a cap and/or a cocking rod.

Growing community of inventors

Oxford, United Kingdom

Alex Edginton