Abstract: A sensor for measuring the flex of a pole when exposed to one or more forces, the sensor including at least one magnet and Hall Effect sensor combination, wherein the at least one magnet and Hall effect sensor are at a predetermined position relative to one another when there are no forces acting on the pole and which are movable relative to one another when forces act on the pole, such that a signal proportional to the relative movement is generated by the sensor.

Abstract: There is disclosed a heat exchanger comprising a first channel, for communicating between a first channel inlet and a first channel outlet, a second channel for communicating between a second channel inlet and a second channel outlet, a third channel for communicating between a third channel inlet and a third channel outlet, a first conduit interconnecting the first channel and the third channel, and thereby defining a first group of interconnected channels, the first conduit extending through the second channel.

Abstract: According to an aspect of the invention, there is provided a laser weapon system, comprising: one or more lasers for generating electromagnetic radiation; laser optics for directing the generated electromagnetic radiation at a target; and a control system, the control system being arranged to monitor three-dimensional position of an object other than the target, and to control a mask to at least limit generated electromagnetic radiation being directed at that object or to direct generated electromagnetic radiation towards another target or a safe location.

Abstract: According to an aspect of the invention, there is provided a laser weapon system, comprising: one or more lasers for generating electromagnetic radiation; laser optics for routing the electromagnetic radiation to laser apertures in the platform which direct the generated electromagnetic radiation at a target, the laser apertures having an associated field of regard; and a control system, the control system being arranged to control which combination of laser, laser optics and laser aperture is used to engage the target, based on a probability of successfully engaging that target in relation to the field of regard of the laser aperture of the combination.

Abstract: Disclosed is an anti-vibration apparatus comprising a bush, said bush comprising a substantially rigid, elongate core, covered in a vibration dampening material having at least one end cap washer, configured in that the bush engages with the end cap washer to cover the end of the elongate core, characterised in that the vibration dampening material further comprises a plurality of recessed portions on its surface.

Abstract: A radio frequency circuit for processing a radio frequency signal. The circuit comprises a variable frequency oscillator system and a radio frequency signal processing circuit arranged to process a radio frequency signal using the output of the variable frequency oscillator system. A digitiser is arranged to receive the output of the radio frequency signal processing circuit and generate a digitised signal. A phase noise capture circuit is arranged to capture the phase noise in the output of the variable frequency oscillator system. The radio frequency circuit is arranged to compensate for the effect of the phase noise in the output of the variable frequency oscillator system on the output of the radio frequency signal processing circuit, by digitally processing the digitised signal generated by the digitiser using the output of the phase noise capture circuit.

Abstract: A heat exchanger comprising: a core comprising first fluid channels, for guiding a first fluid, wherein each of the first fluid channels comprises a plurality of spur conduits interconnecting with at least one of another of the first fluid channels; a manifold for first fluid input comprising an input port which communicates with an input chamber for a first fluid, the chamber branching to form a plurality of first-fluid core-input channels; and a manifold for first fluid output comprising a plurality of first-fluid core-output channels which lead into an output chamber communicating with an output port, wherein each first fluid channel in the core communicates between a respective first-fluid core-input channel and a respective first-fluid core-output channel.

Abstract: A hybrid coupler (20) for dividing an input electrical signal to produce first and second output electrical signals which are substantially out of phase, the hybrid coupler including: a first port comprising an input port (12) for receiving the input electrical signal; an input line (14) for coupling the input electrical signal to a slotline (18); and an output line (24) for coupling the first and second output electrical signals to, respectively, second and third ports comprising, respectively, a first output port (26) and a second output port (28), the output line (24) having a junction with the slotline (18); wherein the slotline (18) couples the input electrical signal to the junction, and the junction acts as a divider to produce the first and second electrical signals; wherein the hybrid coupler further comprises: an input section including said input line (14) and an output section including said output line (24), and wherein the slotline (18) is terminated at the output section by an output open ci

Abstract: An optical device 10 comprises an objective lens 11 defining a focal plane FP and an eyepiece 12 spaced apart therefrom, defining an optical axis OA therethrough. The optical device 10 comprises an optical member 13 having a first planar face 14, arranged on the optical axis OA proximal the focal plane FP, wherein the first planar face 14 is arranged to oppose the objective lens 11. The optical device 10 comprises a filter assembly 100 comprising a first notch filter 101 arranged to attenuate transmission of electromagnetic radiation having a first wavelength ?1, wherein the first notch filter 101 is arranged in front of the optical member 13. The first notch filter 101 is arranged at a first oblique angle ?1 to the optical axis OA whereby, in use, incident electromagnetic radiation having a predetermined wavelength ?i propagating along the optical axis is reflected by the first notch filter 101 away therefrom, wherein the first wavelength ?1 and the predetermined wavelength ?i are different.

Abstract: An optical filter 100 for a visor is described. The optical filter 100 comprises a first layer 101 comprising a first notch filter 102 arranged to attenuate electromagnetic radiation having a first wavelength ?1 incident normally thereupon. The optical filter 100 comprises a second layer 103 comprising a second notch filter 104 arranged to attenuate electromagnetic radiation having a second wavelength ?2 incident normally thereupon. The first wavelength ?1 and the second wavelength ?2 are different. The second layer 103 is stacked upon the first layer 101. In use, the first notch filter 102 attenuates the electromagnetic radiation having a predetermined wavelength ? incident thereupon at a first angle of incidence ?1 and the second notch filter attenuates the electromagnetic radiation having the predetermined wavelength ? incident thereupon at a second angle of incidence ?2, wherein the first angle of incidence ?1 and the second angle of incidence ?2 are different.

Abstract: A system comprising: an additive manufacturing apparatus configured to perform an additive manufacturing process using a feedstock supplied thereto, thereby to produce an article; a feedstock storage module configured to supply feedstock to the additive manufacturing apparatus; a machining apparatus configured to perform a machining process; a controller configured to control operation of the additive manufacturing apparatus and the machining apparatus; and are cycling module configured to receive a waste material and to produce the feedstock therefrom, and to transfer the produced feedstock to the feedstock storage module. The additive manufacturing apparatus and the machining apparatus comprise a common heat source, the additive manufacturing apparatus configured to use the common heat source to perform the additive manufacturing process, and the machining apparatus configured to use the common heat source to perform the machining process.

Abstract: An apparatus is disclosed for producing an optical display comprising an optical waveguide including a first diffractive part arranged to receive display light and to diffract the display light into an angle for guided propagation along the optical waveguide. A second diffractive part of the waveguide is optically coupled to the first diffractive part by the optical waveguide and is arranged to receive and to diffract light from the first diffractive part to an angle for output from the optical waveguide. Those external surfaces of the waveguide against which guided light reflects internally are coated with a meta-material having a refractive index of value less than 1.0 (one).

Abstract: According to a first aspect of the present invention, there is provided a fuse system for a projectile for a ranged weapon, the fuse system comprising: a pressure sensor system for sensing an air pressure of an environment in which the fuse system is present; a control system arranged to receive a signal from the pressure sensor system, and to at least initiate arming of the fuse system conditional on the received signal.

Abstract: An optical waveguide for a head up display having two optical input regions. Optical gratings direct light injected into the optical input regions towards and output region and to be trapped in the optical waveguide by total internal reflection. Beam splitters are provided to expand the pupil in two dimensions. Light from each input region is directed to different areas of the output region.

Abstract: A suspension strut for a vehicle comprises: a first connector for connecting to a first point on the vehicle; a second connector for connecting to a second point on the vehicle; and a damper assembly adapted to provide a damping force as fluid flows through the damper assembly during relative compression between the first point and the second point, wherein the damper assembly comprises a side wall and a damper aperture in the side wall, wherein the damper aperture is open throughout operation of the strut to allow fluid to flow through the damper assembly.

Abstract: A method and apparatus are provided for generating image data for output to a display device such as a HUD or HMD for display and for the validating image data being output to an applicable standard. The image generator comprises an interfacing component, an image rendering component implementing at least one image rendering function and an integrity monitor. The interfacing component receives drawing commands from external systems defining an image to be displayed and derives rendering and other control commands according to a predefined command set recognisable by the image rendering component. The image rendering component generates a set of image data from received rendering commands in the predefined set. The integrity monitor includes a rendering simulator arranged to simulate the at least one image rendering function to generate a nominally identical set of image data from received drawing or rendering commands.

Abstract: A method and apparatus are provided for controlling a digital display device to generate an image for display, wherein the display device is arranged to generate the image as an array of pixels each of a defined brightness achieved by emitting a respective combination of light pulses of durations defined according to a predetermined pulse width modulation (PWM) scheme. Whereas, under conventional PWM schemes, each light pulse would be emitted by the same pixel of a display device, in the present invention rate data from an associated tracker system and data defining predetermined characteristics of the display and operation thereof are used to calculate a pixel displacement in respect of each defined pulse of the PWM scheme. The pixel displacement is used to modify control data defining those pixels to be activated to emit the defined pulse such that a different pixel to that intended emits the pulse during relative movement of the direction of gaze of a user's eye and the display apparatus.

Abstract: A system for remotely sensing light emanating from within a monitored environment. The system comprises one or more retro-reflective optical elements bearing an optically reflective optical coating upon a surface thereof and positionable within the environment to be monitored, and a light source arranged to direct a beam of light at the optical element(s). A detector is arranged to receive from the optical element(s) light returned by the optical coating in response to the beam of light and to detect a property of the monitored environment according to said returned light. The optical element includes a body comprising a focuser part of positive optical power partly surrounded by a reflector part separated therefrom and connected thereto across an open spacing. The optical coating is arranged over an outer surface of the reflector part thereat to receive light which has been at least partially converged by the focuser part for subsequent retro-reflection.

Abstract: A process and apparatus for forming a structure comprising: a) forming a pack from a skin sheet and a core sheet, wherein venting grooves are formed in a surface of a sheet that is adjacent to the other sheet; b) placing the pack in a mould and heating the pack; c) injecting a first gas between the core and skin sheets to urge the skin sheet against the mould; d) injecting a second gas on the side of the core sheet remote from the skin sheet to urge the core sheet against the skin sheet; e) maintaining gas pressure of the second gas thereby diffusion bonding the sheets; and f) withdrawing some or all of the first gas from the cavity.

Abstract: A decryption-enabling device for decrypting a disk image of a computer device, comprising a processor, memory and a hardware connector for connecting to the hardware interface connection of the computer device. The decryption-enabling device is arranged to create using the processor a copy of the random-access memory of the computer device, analyse using the processor the copy of the random-access memory to extract one or more potential decryption keys, and store the one or more potential decryption keys in the memory.