Wavefront measurement is a technique used to analyze the shape of light waves as they travel through space. This process helps in understanding how light interacts with optical systems, such as lenses and mirrors. By measuring the wavefront, scientists and engineers can identify distortions that may affect image quality in devices like telescopes and cameras. Various methods exist for wavefront measurement, including interferometry and shuttered wavefront sensors. These techniques allow for precise evaluation of optical performance, enabling improvements in design and manufacturing. Accurate wavefront measurement is essential in fields like astronomy, ophthalmology, and laser technology.