Idealphotonics' has introduced shearing interferometry, an interferometric measurement technique that generates interference fringes by superimposing the wavefront under test with a spatially offset (sheared) replica of the wavefront, thereby detecting wavefront phase distortion or optical component surface shape errors.By generating interference fringes through wavefront self-shearing superposition, it achieves highly interference-resistant and highly sensitive real-time wavefront phase diagnosis without the need for a reference optical path.v