| 摘要 |
PROBLEM TO BE SOLVED: To attempt to resolve a problem that conventional large-scale spectroscopes are highly efficient but system becomes large and expensive, a small-scale spectroscopes can operate easily at a comparatively low price but a linear array detector used as a detector is not adequate to detect a faint light and requires a certain light quantity, and a spectroscopes consisting of filters and PMTs requires a filter and the PMT for each fluorescence wavelength of the desired number and further, when fluorescence wavelengths are close to each other, the decomposition of wavelength is impossible by the use of the filter in some cases. SOLUTION: The spectroscopy unit is so constituted that, while an edge 5 of the optical fiber 2 continuing into a photodetector 3 is made to face a chromatic aberration lens 1 so as to be arranged movably along the its optical axis 6, a movement control mechanism 7 capable of controlling the migration position is prepared and, a light shielding section is prepared at the central side of the core at the edge of optical fiber. For the optical fiber, it is desirable to adopt the multimode fiber with high NA. COPYRIGHT: (C)2007,JPO&INPIT
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