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https://www.accurateopticsindia.com/blog/schmidt-pechan-prism-how-it-works-and-its-applications/
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Pechan Prism | Accurate Optics Pechan Prism is an optical device that was created by the Pechan brothers in 1868. It was made to improve the quality of images taken through a telescope. The Pechan Prism has since been used in photography, microscopy, and other scientific applications.



