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optical phenomenon resulting from the failure of a lens or mirror to produce a good image aberration , distortion , optical aberration
lens, device in optical instrument limiting light to aperture
optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object apparent motion , apparent movement , motion , movement
(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point astigmatism , astigmia
optical device for focussing a camera or other instrument automatically autofocus
optical instrument designed for simultaneous use by both eyes binoculars , field glasses , opera glasses
optical device for obtaining interference fringes biprism
conductor for transmitting electrical or optical signals or electric power cable , line , transmission line
optical device consisting of an attachment that enables an observer to view simultaneously the image and a drawing surface for sketching it camera lucida
yellow transparent exudate of the balsam fir; used as a transparent cement in optical devices (especially in microscopy) and as a mounting medium Canada balsam
(astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion canal
digitally encoded recording on an optical disk that is smaller than a phonograph record; played back by a laser CD , compact disc , compact disk
optical aberration in which the image has colored fringes chromatic aberration
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 coelostat
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 collimator
small optical laser-made disk containing information compact disc
range of optical density and tone on a photographic negative or print (or the extent to which adjacent areas on a television screen differ in brightness) contrast
either of two fine mutually perpendicular lines that cross in the focus plane of an optical instrument and are use for sighting or calibration cross hair , cross wire
optical glass of low dispersion and low refractive index crown glass , optical crown , optical crown glass
lens made of optical crown glass crown lens
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