| 摘要 |
<p>A transmission illuminator used for a microscope having a transmission illuminating optical system provided with a condenser lens (26) for applying light emitted from a light source (20) to a sample (30) to illuminate the same, and an observation optical system provided with an objective lens (31) for observing the sample, wherein at least two shading members (40a, 40b) are provided in a position conjugate with that of a pupil of the objective lens or in the vicinity of the conjugate position, and used to control the shape of an opening formed in the pupil of the objective lens, whereby it becomes possible to continuously vary contrast without disposing a dedicated optical element in the obervation optical system, and illuminate various samples so as to give optimum contrast thereto.</p> |
