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Measuring with Light

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Long applied to optical shop testing, interferometry is now used to measure many different types of parts in a variety of applications, such as optical system performance, surface roughness, surface form and displacement of moving surfaces.

ZYGO CORP.

An interferometer is an instrument that compares the position or surface structure of two objects. The basic two-beam division of amplitude interferometer components consists of a light source, a beamsplitter, a reference surface and a test surface (Figure 1). The beamsplitter creates the reference...Read full article

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