retardation plate

retardation plate

[‚rē‚tär′dā·shən ‚plāt]
(optics)
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References in periodicals archive ?
A "retardation plate" can be added to the microscope's optical system to help visualize crystallinity.
ABBE condenser; 6 V/20 W quartz halogen illuminators; 1st order red sensitive tint plate; and 1/4 wavelength retardation plate. Unitron, Inc., 170 Wilbur Place, Bohemia, NY 11716.