beware predictions of the demise of any technology. if the early 1920s saw the dawn of the optical comparator there has been much speculation about its sunset. that was especially true when vision systems started hitting their stride a few years ago. many could see optical comparators were superfluous with the use of vision systems.
the evolution of metrology equipment: profile projection comparators vs. vision inspection systems the first comparators were commonly known as “shadowgraphs.” they allow for measurement via a shadow “cast from a magnified image of a workpiece onto a screen with an overlay chart” writes quality magazine in the article “comparators
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vision systems where optical comparators work predominantly with the optical shadow of a work piece vision systems use precise lighting controlled optics and a video camera to count pixels. this information provides a data stream that control systems translate into meaningful dimensional data.
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vision x manufactures software and systems for machine vision visual inspection image analysis general defect detection and metrology.. we also are the manufacturers of the visiongauge® digital optical comparator (also known as profile projectors shadowgraphs or video comparators).
optical comparators . an optical comparator is an instrument that projects a greatly magnified image of a part feature onto a screen for examination. it is used to compare the shape size and location of its features against prescribed limits. now stocking select models details here optical comparators flyer 2.
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visiongauge® digital optical comparators / profile projectors (also known as shadowgraphs or video comparators) visiongauge® digital optical comparators / profile projectors are the fastest easiest most accurate way to compare a part to a cad file.