Qinetiq Limited

Paul M Blanchard

Alan H Greenaway

Philip St John Russell

Peter A Lloyd

Andrew Robert Harvey

James G Burnett

Roy McBride

Douglas A Payne

A reconfigurable, three-dimensional display () wherein knowledge of the viewer's () eyes is used to enable the effective exit pupil(s) of the display system to be optimised. The system utilises this knowledge to identify contributing regions () within the display () that contribute light to the viewer (). Priority is given to calculating and displaying the part of the display corresponding to the contributing region (), thereby allowing the system computation requirements to be minimised. Further computation savings are achievable by recognising that only light travelling in a limited range of angles need to be considered.

Computation time reduction for the three-dimensional displays

A three-dimensional imaging system is described which exploits the defocusing of non-zero diffraction order images caused by the quadratic distortion of a diffraction grating (). An optical system () is used such that objects (and), located at different distances from grating (), are imaged simultaneously and spatially separated on a single plane B.

Three-dimensional imaging system

An optical fibre bend sensor ( ) measures the degree and orientation of bending present in a sensor length ( ) portion of a fibre assembly ( ). Within a multicored fibre ( ), cores ( ) are grouped in non-coplanar pairs. An arrangement of optical elements ( ) define within each core pair ( ) two optical paths ( ) which differ along the sensor length ( ): one core ( ) of a pair ( ) is included in the first path ( ), and the other core ( ) in the second path ( ). A general bending of the sensor region ( ) will lengthen one core ( ) with respect to the other. Interrogation of this length differential by means of interferometry generates interferograms from which the degree of bending in the plane of the core pair is extracted. Bend orientation can be deduced from data extracted from multiple core pairs.

Optical fibre bend sensor

An optical fiber bend sensor ( ) measures the degree and orientation of bending present in a sensor length ( ) portion of a fiber assembly ( ). Within a multicored fiber ( ), cores ( ) are grouped in non-coplanar pairs. An arrangement of optical elements ( ) define within each core pair ( ) two optical paths ( ) which differ along the sensor length ( ): one core ( ) of a pair ( ) is included in the first path ( ), and the other core ( ) in the second path ( ). A general bending of the sensor region ( ) will lengthen one core ( ) with respect to the other. Interrogation of this length differential by means of interferometry generates interferograms from which the degree of bending in the plane of the core pair is extracted. Bend orientation can be deduced from data extracted from multiple core pairs.

Growing community of inventors

Malvern, United Kingdom

Paul M Blanchard