About: quarter-wave plate

Premodifier: quarter-wave
Head noun: plate

Same concepts
http://dbpedia.org/resource/Waveplate

Broader concepts

label	provenance	confidence
retardation plate	isap:376720600	0.709872
optical system	isap:164905127	0.706954
device	isap:157689417	0.621637
component	isap:336382328	0.481696
element	isap:225168526	0.479654

Narrower concepts

label	provenance	confidence
plate	isap:376720623	0.178189