| 摘要 |
<p>A beam of visible or UV light is directed by a sliding mirror (20) onto a diffraction grating (33) through each of a plurality of collimators (29 to 32) in turn. At each turn a photodiode array (35) measures the spectrum of a corresponding portion of the range of frequencies over which the instrument operates. A set of broad-band band-pass filters (16) may eliminate undesired frequencies at each turn.</p> |
