Prosthetic joint testing. Engineers using holographic interferometry to measure the roughness of the surface of a prosthetic knee joint. The prosthetic joint is in the black box at left. A laser is aimed at the joint,via a series of mirrors,and the light reflected from the joint is collected and used to form a hologram. Any irregularities in the surface of the joint will show as interference on the hologram. Photographed at the FDA's Center for Devices and Radiological Health,Mechanics and Material Laboratory,USA,in 1987 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Food & Drug Administration |
Bildgröße: | 5433 px × 3657 px |
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