holographyrelated

Holography-related refers to topics and research connected with holography, the technique for recording and reconstructing the light field of a scene to produce three-dimensional images. A hologram is created when coherent light, usually from a laser, is split into an object beam that interacts with the subject and a reference beam that illuminates a recording medium. The resulting interference pattern encodes amplitude and phase information, enabling a three-dimensional image to be reconstructed when illuminated again.

Applications span security, displays, data storage, and scientific imaging. Security holograms secure currency and products against counterfeiting. In displays, holography supports 3D visualization, including digital and computer-generated holography. In science, holographic methods enable quantitative phase imaging, holographic microscopy, and precise surface metrology, while digital holography and computational holography broaden reconstruction capabilities from captured holograms.

Key technologies include holographic recording media (photopolymers, photorefractive materials), spatial light modulators, and interferometric setups. Digital and computational holography use cameras and software to reconstruct images, expanding flexibility and automation. Holographic data storage remains a research topic, facing cost, speed, and durability challenges. Research also covers holographic interferometry and color displays, often aided by machine learning to improve quality.

Historically, holography was invented by Dennis Gabor in 1947; practical demonstrations followed after laser development in the 1960s, with notable contributions from Emmett Leith and Juris Upatnieks. Since then, the field has expanded into consumer, industrial, and scientific applications.