optical device

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a device for producing or controlling light
• Hypernyms:
device
• Hyponyms:
autofocus, biprism, camera lucida, coelostat, collimator,
diffraction grating, grating, diffuser, diffusor, finder, viewfinder,
view finder, Kerr cell, laser, optical maser, lens, lense,
lens system, Nicol prism, planetarium, polarimeter, polariscope, prism,
optical prism, projector, Rochon prism, Wollaston prism, stereoscope, viewer