From Longman Dictionary of Contemporary EnglishRelated topics: Opticsldoce_241_dopticalop‧ti‧cal /ˈɒptɪkəl $ ˈɑːp-/ ●○○ adjectiveHPOrelating to machines or processes which are concerned with light, images, or the way we see things
microscopes and other optical instruments —optically /-kli/ adverbExamples from the Corpusoptical• This, thought Robert, was something of an opticalachievement on her part.• Consider a photon which is polarisedparallel to the opticalaxis of P, .• Optical bar-code scanners have revolutionized the postal system.• optical distortions caused by poor quality lenses• They sellopticalequipment such as cameras and telescopes.• It also explains why it is virtually certain that Britain's maintrunk lines will rely on opticalfibre.• But lasers have snags: even with optical fibres, lasers can not reach every part of the body.• For this reason the phase control signals to these upperbase drives are often transmitted via a stage of opticalisolation.• However, the dimensions of the smallest circuit-parts will soon have shrunkbeyond the limit that opticalmicroscopes can resolve.• One projected use is for opticalrecognitionexperiments.• Polishedsurfaces give the best opticalresolution, and the double polished thinsectionsdescribed in Chapter 4 are ideal.optical instruments• The first questions Wien asked were related to the resolving power of optical instruments.• There is, however, one classicalrestriction which we must take into account, namely the resolving power of optical instruments.• Even optical instruments, such as perspective machines, the cameraobscura and the camera lucida, were used sparingly.
