摘要 |
An optical apparatus comprising a sample holding means ( 11 ), a detector ( 2 ) and first and second light selection means ( 5, 6, 15 ), the sample holding means being provided with a window to receive incident light ( 3 ) from a light source, the first light selection means ( 5 ) being arranged to allow light that passes from the sample holding means in a direction substantially parallel to the direction of the incident light to pass to the detector, and the second light selection means ( 6, 15 ) being arranged to allow light that is emitted from the sample holding means in a direction substantially transverse to the direction of the incident light to pass to the detector.
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