optical device

Definitions of optical device
  1. noun
    a device for producing or controlling light
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    autofocus
    an optical device for focussing a camera or other instrument automatically
    biprism
    an optical device for obtaining interference fringes
    camera lucida
    an optical device consisting of an attachment that enables an observer to view simultaneously the image and a drawing surface for sketching it
    coelostat
    optical device used to follow the path of a celestial body and reflect its light into a telescope; has a movable and a fixed mirror
    collimator
    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; light rays leave the slit as a parallel beam
    diffraction grating, grating
    optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum
    diffuser, diffusor
    optical device that distributes the light of a lamp evenly
    finder, view finder, viewfinder
    optical device that helps a user to find the target of interest
    Kerr cell
    optical device consisting of a transparent cell with two electrodes between two polarizing media; passes light only if the two planes of polarization are parallel; used as a high-speed shutter or to modulate a laser beam
    laser, optical maser
    an acronym for light amplification by stimulated emission of radiation; an optical device that produces an intense monochromatic beam of coherent light
    lens, lens system, lense
    a transparent optical device used to converge or diverge transmitted light and to form images
    Nicol prism
    optical device that produces plane-polarized light
    planetarium
    an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome
    polarimeter, polariscope
    an optical device used to measure the rotation of the plane of vibration of polarized light
    optical prism, prism
    optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image
    projector
    an optical device for projecting a beam of light
    Rochon prism, Wollaston prism
    optical device that produces plane-polarized ultraviolet light
    stereoscope
    an optical device for viewing stereoscopic photographs
    viewer
    an optical device for viewing photographic transparencies
    anastigmat
    compound lens or lens system designed to be free of astigmatism and able to form approximately point images
    anastigmatic lens
    a lens designed to correct astigmatism
    camera lens, optical lens
    a lens that focuses the image in a camera
    compound lens
    a lens system consisting of two or more lenses on the same axis
    condenser, optical condenser
    lens used to concentrate light on an object
    contact, contact lens
    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
    lens such that a beam of light passing through it is brought to a point or focus
    crown lens
    a lens made of optical crown glass
    concave lens, diverging lens
    a lens such that a parallel beam of light passing through it is caused to diverge or spread out
    echelon
    a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
    erecting prism
    a right-angled optical prism used to turn an inverted image upright
    eyepiece, ocular
    combination of lenses at the viewing end of optical instruments
    field lens
    the lens that is farthest from the eye in an optical device with more than one lens
    Fresnel lens
    lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
    intraocular lens
    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
    (optics) a lens that is concave on one side and convex on the other
    eyeglass, monocle
    lens for correcting defective vision in one eye; held in place by facial muscles
    object glass, object lens, objective, objective lens
    the lens or system of lenses in a telescope or microscope that is nearest the object being viewed
    type of:
    device
    an instrumentality invented for a particular purpose
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