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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
a device for producing or controlling light

noun.artifact

19 Subcategories

autofocus go
an optical device for focussing a camera or other instrument automatically
biprism go
an optical device for obtaining interference fringes
camera lucida go
an optical device consisting of an attachment that enables an observer to view simultaneously the image and a drawing surface for sketching it
coelostat go
optical device used to follow the path of a celestial body and reflect its light into a telescope
collimator go
optical device consisting of a tube containing a convex achromatic lens at one end and a slit at the other with the slit at the focus of the lens
diffraction grating, grating go
optical device consisting of a surface with many parallel grooves in it
diffuser, diffusor go
optical device that distributes the light of a lamp evenly
finder, viewfinder, view finder go
optical device that helps a user to find the target of interest
Kerr cell go
optical device consisting of a transparent cell with two electrodes between two polarizing media
laser, optical maser go
an acronym for light amplification by stimulated emission of radiation
lens, lense, lens system go
a transparent optical device used to converge or diverge transmitted light and to form images
Nicol prism go
optical device that produces plane-polarized light
planetarium go
an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome
polarimeter, polariscope go
an optical device used to measure the rotation of the plane of vibration of polarized light
prism, optical prism go
optical device having a triangular shape and made of glass or quartz
projector go
an optical device for projecting a beam of light
Rochon prism, Wollaston prism go
optical device that produces plane-polarized ultraviolet light
stereoscope go
an optical device for viewing stereoscopic photographs
viewer go
an optical device for viewing photographic transparencies