[ kwawr-ter-weyv ]
/ ˈkwɔr tərˌweɪv /
a crystal thin enough to cause a phase difference of 90° between the ordinary and extraordinary rays of polarized light, thereby converting circularly polarized light into plane polarized light.
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Compare half-wave plate.
Origin of quarter-wave plate
First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019