Images Dated 14th November 2002
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Featured 14 Nov 2002 Print
Microcombs for X-ray telescopes
Microcombs. Researcher holding several microcombs designed to hold the foil "mirrors" in orbiting X- ray telescopes. These tiny, lightweight devices must be accurate on the nanometre scale to give the desired image quality. X-ray telescopes, such as the XMM-Newton, do not use lenses or conventio- nal mirrors. Instead they use arrays of concentric tubular mirrors that taper slightly towards the detector, focusing X-rays on it by grazing- incidence reflection. The quality of the resulting image depends on the precision of the mounting of the mirrors. It is hoped that these microcombs will allow much greater resolution to be achieved. Photographed at MIT, USA, in 2002
© VOLKER STEGER/SCIENCE PHOTO LIBRARY