The Twyman–Green interferometer is an optical instrument used to measure the wavefront of light and assess the quality of optical components, particularly in the contexts of testing lenses, mirrors, and other optical systems. It is a type of interferometer that utilizes the principle of interference to reveal variations in the optical path length, which can indicate imperfections or deviations in a surface. **Key Features of the Twyman–Green Interferometer:** 1.
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