optical instrument
— Noun
– English
～ an instrument designed to aid vision
optical lens
— Noun
– English
～ a lens that focuses the image in a camera
optical maser
— Noun
– English
～ an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light
optical fibre
— Noun
– English
～ a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images
optical crown glass
— Noun
– English
～ optical glass of low dispersion and low refractive index
optical
— Adjective
– English
～ of or relating to or involving light or optics; "optical supplies"
optical
— Adjective
– English
～ of or relating to or resembling the eye; "ocular muscles"; "an ocular organ"; "ocular diseases"; "the optic (or optical) axis of the eye"; "an ocular spot is a pigmented organ or part believed to be sensitive to light"; "ophthalmic defect"
optical
— Adjective
– English
～ relating to or using sight; "ocular inspection"; "an optical illusion"; "visual powers"; "visual navigation"