| 摘要 |
<p>In order to provide a device for increasing the contrast for ring light illumination systems which are intended for illuminating objects to be observed from above in microscopy, in particular in stereomicroscopy, by means of which a device for optimum matching of ring light illumination to an object to be observed, which device is as cost-effective and simple to operate as possible, is obtained and, in addition, in a developed embodiment with this device the illumination azimuth can also be varied, the invention proposes arranging a diaphragm (7), which is in particular rotationally symmetrical and adjustable, beneath the light exit of a ring light (1) provided on a microscope objective (2) in such a way that undesired light components of the ring light (1), which would enter the microscope objective (2) after reflection outside a usable object field (6), are masked out by the diaphragm (7), and wherein means are provided for adjusting and clamping the diaphragm (7).</p> |
