| dark-field condenser | An apparatus for throwing reflected light through the microscope field, so that only the object to be examined is illuminated, the field itself being dark. (05 Mar 2000) |
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| dark-field microscope | <instrument> A microscope that has a special condenser and objective with a diaphragm or stop that scatters light from the object observed, with the result that the object appears bright on a dark background. (05 Mar 2000) |
| Cassegrainian darkfield condenser | <microscopy> Named after Cassegrain, astronomer of the 17th century. A high-power, dark field con-denser to be used with objective apertures as high as 1.3. It is sometimes called the luminous spot ring condenser (Zeiss). (05 Aug 1998) |
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| condenser, darkfield, bispheric | <microscopy> A dark field condenser consisting of a convex spherical reflector mounted concentric with a larger concave reflector. The rays are formed into a diverging cone by the convex reflector. The annular concave reflector then forms a hollow converging cone which is focused on the subject. See (05 Aug 1998) |
| condenser, darkfield, paraboloid | <microscopy> A dark field condenser consisting of a reflecting surface in the form of a segment of a paraboloid of revolution. Parallel rays entering the condenser around the periphery of the central stop are reflected from the curved surfaces and converge at the focus of the paraboloid. See (05 Aug 1998) |
| dark-field microscope |
ultramicroscope: light microscope that uses scattered light to show particles too small to see with ordinary microscopes
Ãâó: wordnet.princeton.edu/perl/webwn
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| dark-field microscope |
A microscope (device used to magnify small objects) in which objects are lit at a very low angle from the side so that the background appears dark and the objects show up against this dark background.
Ãâó: www.seniormag.com/conditions/cancer/cancerglossary...
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| dark-field | light microscope that uses scattered light to show particles too small to see with ordinary microscopes |
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