| 摘要 |
<p>In order to reduce both the luminance irregularity inside a frame and the luminance irregularity between frames, an example of an observation device according to the present invention comprises an illumination optical system for illuminating a sample with laser light from a laser light source, and an imaging unit for repeatedly imaging the sample illuminated by the illumination optical system. The illumination optical system includes a light diffusion element and a control unit for periodically changing the diffusion pattern in the region of the light diffusion element onto which the laser light is irradiated. The control unit performs a setting so that the changes in the diffusion pattern during imaging operation match with each other among a plurality of the repeated imaging operations.</p> |
