| 摘要 |
Monochromatic exciting light is transmitted in a forward direction from a source through a sample to a spherical mirror. The spherical mirror reflects the light in a backward direction through the sample and images the light upon a flat mirror. The flat mirror reflects the light in the forward direction, through the sample, to the spherical mirror, thereby causing the light to be reflected in the backward direction, through the sample, to the source. The reflections increase the optical path length of the light through the sample, thereby enhancing a fluorescent emission therefrom.
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