Simple optics display the part upside down and backwards on the glass screen. Corrected optics display the part right side up and backwards. Fully corrected optics yield an image identical to the part ...

Inspecting with Optical Comparators provides an overview of the optical comparator, which uses optics to project an enlarged, two-dimensional shadow of a part onto a glass screen for measurement of ...

Used for a wide range of dimensional inspection purposes, optical comparators measure the dimensions and geometry of a sample through a projected image. The mechanical system within the operator ...

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That versatile indicator was the Starrett W4900 Touch Screen Indicator from The L.S. STARRETT CO., manufacturer of precision measuring tools and gages, and metrology systems. James Clinton, inside ...