The Anamorphic prism is a special type of optical prism. Its core characteristic is to achieve stretching or compression of the image in a single dimension by different degrees of refraction of light in different directions (usually horizontal and vertical), thereby changing the aspect ratio of the image. The cross-section of the prism is usually wedge-shaped or trapezoidal, and the angles of the refractive surfaces in different directions are different, resulting in different refraction amounts of light in the horizontal and vertical directions. It is applied in film and television and photography technology, optical display and projection, laser processing and scanning, spectral analysis and imaging, etc.