Medical Definition of Phase plate
1.
The plate used near the back focal plane of a microscope objective lens (in conjunction with an annulus at the front focal plane of the condenser lens) to achieve phase contrast. The phase plate selectively shifts the phase of the waves diffracted by the specimen by a quarter wave and reduces the amplitude of the undeviated, direct beam.
(05 Aug 1998)
Lexicographical Neighbors of Phase Plate
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