phase-contrast microscope

phase microscope

noun
a microscope that utilizes the phase differences of light rays transmitted by different portions of an object to create an image in which the details of the object are distinct despite their near-uniformity of refractive index.
Also called phase-contrast microscope [feyz-kon-trast] .


Origin:
1945–50

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Collins
World English Dictionary
phase-contrast microscope
 
n
a microscope that makes visible details of colourless transparent objects. It employs a method of illumination such that small differences of refractive index of the materials in the object cause differences of luminous intensity by interference

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