dark-field illumination


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dark-field illumination

n
(General Physics) illumination of the field of a microscope from the side so that the specimen is viewed against a dark background
References in periodicals archive ?
1) In particular, refractile material was not noted, dark-field illumination was not reported, and no SEM/EDXA or IR was performed.
For example, dark-field illumination often is used to highlight surface defects, scratches, or engraving, especially on reflective objects.
Incident dark-field illumination provides a black background in the absence of a specimen, just as transmitted dark-field does.