dark-field microscope

dark-field microscope

n.

A microscope in which an object is illuminated only from the sides so that it appears bright against a dark background.

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microscope,

n an instrument containing a powerful lens system for magnifying and viewing near objects.

Microscope, Confocal Laser Scanning (CLSM),

n.pr a microscope equipped with a laser beam light source, electronic image detector, and computer for image storage and processing that is used in the laboratory to perform high-resolution, three-dimensional microscopy.

microscope, dark-field,

n a microscope that has a special condenser and objective with a diaphragm or stop by which light is scattered from the object with the result that the object appears bright and the background dark.

microscope, electron,

n a microsope in which electron beams with wavelengths shorter than those of visible light are used in place of visible light, allowing much greater resolution and magnification of the object.

microscope, electron, scanning (SEM),

n an electron microscope capable of reflecting electrons from the specimen surface, resulting in a three-dimensional image of the surface that provides both high resolution and a great depth of focus view of the object.

microscope, interference,

n a microscope designed to split entering light into two beams that pass through the specimen and are recombined in the image plane, allowing visualization of refractile object details that are not possible with a single beam.

microscope, phase-contrast,

n a specially constructed microscope that has a special condenser and objective containing a phase-shifting mechanism whereby small differences in refraction can be made visible to intensity or contrast in the images. It is particularly helpful in examining living or unstained cells and tissues. This is an excellent aid in the education and motivation of patients in the understanding and control of dental plaque.