| 摘要 |
<p>The invention relates to an optical sensor arrangement and to a method for measuring an observable. The sensor arrangement comprises a light source (5) for emitting light of a spectrum containing a plurality of different wavelengths, a first optical element (2), a second optical element (3), a first photo detector (6) and a second photo detector (7). The light source (5) is optically coupled to the first optical element (2) for feeding the light into the first optical element (2), the first optical element (2) being optically coupled to the second optical element (3) for feeding a part of the light transmitted by the first optical element (2) into the second optical element (3). The first photo detector (6) is optically coupled to the first optical element (2) for detecting a first component of said part of the light which is not transmitted by the second optical element (3), the second photo detector (7) being optically coupled to the second optical element (3) for detecting a second component of said part of the light which is transmitted by the second optical element (3), wherein one of the first and the second optical elements (2, 3) is an optical filter for filtering out a subset of said wavelengths and wherein the remaining of the first and the second optical elements (2, 3) is a sensor element, the sensor element or the filter being tunable.</p> |
