About: holographic optical element

Premodifier: holographic optical
Head noun: element

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

Broader concepts

label	provenance	confidence
diffractive optical element	isap:437869043	0.855404
means	isap:32749601	0.465039

Narrower concepts

label	provenance	confidence
filter	isap:448101369	0.505712
lens	isap:5843577	0.472027