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6 terms
Photonics Dictionary: D
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microscope x
D x
dust counting microscope
A microscope that has been modified to permit the quantitative analysis of dust samples.
dark-field illumination
The transmission of light by a condenser to observe either very small particles or very fine lines with a microscope.
dichroscopic eyepiece
An eyepiece used in a polariscope or polarizing microscope to give a comparison view of the same object under illumination by the two complementary rays of polarized light.
diffraction rings
1. The ring patterns of light that seem to encircle particles in the field of a microscope. 2. See Newton's rings.
direct illumination
Light produced by visible radiation that moves from the light source to the object without reflection. With respect to microscopy, this is the light that directly strikes the stage of the microscope...
dry objective
A microscope objective designed to be used without liquid between the cover glass and the objective, or, in the case of metallurgical objectives, between the objective and the specimen.
Photonics Dictionary
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