An optical imaging system (1) for in vivo retinal imaging the system (1) comprising: an optical source (3) for generating incoherent light in a plurality of wavelength bands; an optical imaging sub system (6) configured to split light from said optical source (3) into a plurality of beams to introduce a path differe...

This invention relates to an element (11) for generating a fluid dynamic force, the element (11) comprising first (13) and second (15) surfaces extending in opposite directions from a leading edge (17) of the element (11) and meeting at a trailing edge (18) thereof to define a three dimensional body that is shaped t...

A method, and associated apparatus, for generating power from medium temperature heat sources in the range of 200º to 700ºC with improved efficiency compared to systems operating on a Rankine cycle in which the working fluid is condensed at the same temperature. Water is heated in a boiler (11) with heat from the he...

A vapour power generating system for generating power by using heat from a source of heat. The system has a closed circuit for a working fluid, and includes a heat exchanger assembly (1) for heating the fluid under pressure with heat from the source, a separator (8) for separating the vapour phase of the heated f...