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(31) He uses an optical scanner and a computer with synthetic voices.

(32) The density of optical interconnections can be much greater than even the most advanced silicon and gallium arsenide processes.

(33) Others use optical detectors, which seem to respond more quickly to smoke from smouldering fires such as those involving upholstered furniture.

(34) Therefore, I recommend either giving the instrument a thorough test, or else asking for an opinion by an optical expert.

(35) Sometimes the light is carried to and from the point of observation by optical fibres.

(36) The infrared picture is at 10 times the scale of the optical photograph, showing only the very centre of the galaxy.

(37) There is, however, one classical restriction which we must take into account, namely the resolving power of optical instruments.

(38) Most argued that the canals were optical illusions, and that Mars was a cold, waterless, radiation-baked world.

(39) An optical fibre uses total internal reflection to carry a light beam over long distance and around corners.

(40) It is proposed that this collection should be sifted, and the contents scanned and stored electronically on optical media.

(41) The optical paths are evacuated and the suspension systems are insulated against mechanical vibration by shock absorbers.

(42) Even fraction of a second, the optical density of the nucleus is measured and stored in the computer's memory.

(43) Many rocks are composed of a high proportion of echinoderm debris, which is easily recognized because of this optical property.

(44) This could include word processing, a database, case management and optical character recognition.

(45) One example is the method of recognition using template matching which is applied in both speech recognition and optical character recognition.

(46) Polished surfaces give the best optical resolution, and the double polished thin sections described in Chapter 4 are ideal.

(47) Another scientist might have proposed a modification in the optical theory governing the operation of the telescopes used in the investigation.

(48) Contact lenses, now sometimes used with very young children as well as older pupils,[http://sentencedict.com/optical.html] provide optical correction in another form.

(49) Shiseido's Wrinkle Smoothing Concentrate works on the principle of an optical illusion.

(50) Another growing use for scanners is as optical character readers.

(51) The fiber-to-the-curb architecture provides high-capacity switched digital network services to optical network units serving multiple residences.

(52) One development of the optical encoder employs two photosensitive devices with a small relative displacement.

(53) It is interesting to examine the optical fibre before using it in the communications system.

(54) The characteristics of optical fibre change with temperature, sufficiently to change the required magnetic field period.

(55) The company has been adept at moving into high-margin businesses such as laboratory services, optical fibres and speciality materials.

(56) The crystal acts as an analyser which ascertains whether or not the photon has polarisation perpendicular to the optical axis of the crystal.

(57) Another snag with optical fibre is spurious reflection inside the fibre.

(58) Even optical instruments, such as perspective machines, the cameraobscura and the camera lucida, were used sparingly.

(59) For once, the optical illusion experienced by sailors leaving port seemed apt.

(60) The Offset represents the weird and wonderful, and at first glance has the same unsettling effect as an optical illusion.