Bae Systems, Inc.

Andrew James Williams

Michael Stewart Griffith

Nicholas Giacomo Robert Colosimo

Julian David Wright

Leslie Charles Laycock

Mark Edgar Bray

Lydia Ann Hyde

Stephen Derek Finch

A network, or part thereof for example a link,is described. The networkis for data communication through a medium, preferably wherein the medium comprises and/or is, at least in part, a liquid medium LM. The networkcomprises a set of transmitters, including a first transmitterA comprising a controllerA, wherein the first transmitterA is configured to transmit a set of polarised optical signals S, including a first polarised optical signal Scomprising first data Dof set of data D. The networkcomprises a set of receivers, including a first receiverA comprising a controllerA, wherein the first receiverA is configured to receive the first polarised optical signal S

Network and method for optical communication with polarised light signal

A multi-aperture free-space optical communications receiver comprises a plurality of telescopes each having a clear objective aperture with a diameter between 50 mm and 250 mm and arranged for receiving light collectively from an optical communications light source. A coherent combiner unit is configured for coherently combining the collectively received light to produce a combined optical signal therewith. Each telescope is arranged in association with, respectively, a wavefront detector to determine a wavefront of said received light directed to it by the respective telescope, a steerable reflector unit including a deformable mirror controllable to deform according to said determined wavefront such that said received light is reflected by the deformable mirror with a modified wavefront, and an optical signal receiver comprising a single-mode optical fibre. The steerable reflector unit is steerable to input received light with modified wavefront into the single-mode optical fibre for reception by the optical signal receiver.

Multi-aperture free-space optical communications receiver

The invention relates to the field of Free Space Optics (FSO), more specifically it is directed to: a method of obtaining a connection between at least two optical signal nodes, of a FSO, communication system each node comprising a transmitting device and receiving device; and

Optical signal transmitter

Disclosed is a lighter than air vehicle comprising a first envelope, a second envelope located inside the first envelope, and a tube connecting the first envelope to the second envelope. The first envelope and the second envelope are spaced apart so as to define a chamber between the first envelope and the second envelope. The chamber is filled with a lighter than air gas. A first opening of the tube is located at an external surface of the first envelope. A second opening of the tube is located at an internal surface of the second envelope, the second opening of the tube being at an opposite end of the tube to the first opening of the tube.

Lighter than air vehicle

Apparatus for and method of transmitting an optical signal by a Free Space Optical, FSO, communication system, the method comprising: transmitting, by an optical signal transmitter (), an optical signal () into at least part of a volume of an optical medium (); and controlling, by a controller, the optical signal transmitter (), to scan the at least part of the volume () using the optical signal () in a sequence of non-overlapping loops (). The sequence of non-overlapping loops () may be a sequence of non-overlapping, concentric circular loops.

Optical communication device

A free space optical communication system receiver () comprising: a central optical sensor (); and a plurality of further optical sensors (-) disposed around a peripheral edge of the central optical sensor (). The free space optical communication system receiver () may be coupled to means for moving the free space optical communication system receiver () relative to an incoming optical signal (). A controller () may be configured to, using measurements of the incident optical signal () by the plurality of further optical sensors (-), control the means so as to move the free space optical communication system receiver () relative to the incident optical signal ().

Free space optical communication system receiver

Imaging apparatus on a host platform having an external surface, the external surface comprising a first surface facing a first direction and a second surface facing a second direction, the second direction being different to the first, the apparatus comprising a first and second plurality of single pixel detectors () distributed about said external surface such that the first plurality of single pixel detectors are distributed over the first surface and the second plurality of single pixel detectors are distributed over the second surface, each single pixel detector being configured to receive radiation reflected by an object or region of interest () and generate two-dimensional image data representative thereof, the apparatus further comprising an image processing module () for receiving said two-dimensional image data from each of a plurality of single pixel detectors () and reconstructing a three-dimensional image of said object or region of interest () using a ghost imaging algorithm.

Imaging apparatus and method having an image processing module reconstructing a three dimensional image from two dimensional image data using a ghost imaging algorithm

Disclosed is a lighter than air vehicle comprising: an envelope containing a lighter than air gas, at least part of the envelope admitting the passage of light through the at least part of the envelope; and a directing device for selectively redirecting the light which passes through the at least part of the envelope. The vehicle may further comprises a plurality of devices for using incident light. The directing device for selectively redirecting the light may be for selectively redirecting the light onto a selected device, for example, by switching the positions of two or more devices into the path of the light.

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Chelmsford, United Kingdom

Andrew James Williams