| abstract |
When exchanging a dichroic mirror (27) to detect fluorescence of a different wavelength, it is unnecessary to carry out precise positional adjustment, particularly in a compact examination apparatus, and the dichroic mirror (27) can be easily exchanged. The invention provides a connection unit including a light-source optical fiber (7), removably connected to the light source (3), for conveying the excitation light from the light source (3); a collimator lens (24) for collimating the excitation light emitted from the light-source optical fiber (7) to introduce the excitation light to the optical scanning section (17); and a dichroic mirror (27) for splitting off fluorescence, which is generated in the sample and which returns via the objective lens (20) and the optical scanning section (17), from a light path of the excitation light and for directing the fluorescence to a photodetector (15). The light-source optical fiber (7), the collimator lens (24), and the dichroic mirror (27) are secured to each other such that optical axes thereof are aligned. |