| 摘要 |
<p>Apparatus and method for the non-invasive measurement of parameters relating to a biological tissue (T) by spectroscopy, in particular with infra-red light, is described and comprises a plurality of light sources (2) each of which can emit a light signal with one or more predetermined wavelengths, towards the tissue (T), a light detector (10) for detecting a light signal transmitted by the tissue (T) as a result of the illumination by the sources (2), and driving means (7a, 7b) for the light emitted by the sources (2), for modulating the light signal emitted by each of the sources, the apparatus further comprising processing means (9) to which the driving means (7a, 7b) are coupled in order to control the modulation of the light signals emitted by the sources (2) in a spread-spectrum manner, that is broadened-spectrum modulation using modulation functions having a low cross-correlation both with one another and with random or periodic noise source.</p> |
