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Parent Categories

entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)

physical entity go
an entity that has physical existence

object, physical object go
a tangible and visible entity

whole, unit go
an assemblage of parts that is regarded as a single entity

artifact, artefact go
a man-made object taken as a whole

instrumentation, instrumentality go
an artifact (or system of artifacts) that is instrumental in accomplishing some end

device go
an instrumentality invented for a particular purpose

optical device go
a device for producing or controlling light

lens, lense, lens system
a transparent optical device used to converge or diverge transmitted light and to form images

noun.artifact

16 Subcategories

anastigmat go
compound lens or lens system designed to be free of astigmatism and able to form approximately point images
anastigmatic lens go
a lens designed to correct astigmatism
camera lens, optical lens go
a lens that focuses the image in a camera
compound lens go
a lens system consisting of two or more lenses on the same axis
condenser, optical condenser go
lens used to concentrate light on an object
contact, contact lens go
a thin curved glass or plastic lens designed to fit over the cornea in order to correct vision or to deliver medication
converging lens, convex lens go
lens such that a beam of light passing through it is brought to a point or focus
crown lens go
a lens made of optical crown glass
diverging lens, concave lens go
a lens such that a parallel beam of light passing through it is caused to diverge or spread out
eyepiece, ocular go
combination of lenses at the viewing end of optical instruments
field lens go
the lens that is farthest from the eye in an optical device with more than one lens
Fresnel lens go
lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
intraocular lens go
an artificial lens that is implanted into the eye of someone to replace a damaged natural lens or someone who has had a cataract removed
meniscus go
(optics) a lens that is concave on one side and convex on the other
monocle, eyeglass go
lens for correcting defective vision in one eye
objective, objective lens, object lens, object glass go
the lens or system of lenses in a telescope or microscope that is nearest the object being viewed