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  • comparator 1. An eyepiece or magnifier with a scale at its image plane. That scale is placed in contact with an object, permitting direct measurement of its size. 2. Also called traveling stage and traveling microscope. An instrument intended for precise...
  • optical comparator Typically used for the examination of manufactured or engineered parts, an optical gauging device, in which a backlight is used to project the silhouette of an object upon a screen in which the physical dimensions of the object, can be visually...
  • color comparator 1. A device used in chemistry to compare the colors of solutions held in flat-bottomed tubes and viewed along the length of the tube. Often a solid glass plunger is moved along one of the tubes to effect a color match, the position of the plunger...
  • stereocomparator 1. A stereoscope that has adjustable scales to allow the determination of distances and dimensions from stereoscopic photographs. 2. A device used to view pictures of the same section of the night sky, taken at different times to determine stellar...
  • blink comparator An optical system that rapidly alternates two similar pictures or scenes to permit the detection of small dissimilarities between them.
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