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 ...

Relativity of motion furnishes the chief clues to the perception of it, yet we ascribe motion to objects as if they had acquired an absolute quality. This way of perceiving plays strange tricks ...

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 ...