Diffusion refers to the use of diffusion material or diffusion media to scatter light and produce softer, more even illumination.
In lighting, imaging, and AV environments, diffusion is the process of spreading light rays in multiple directions rather than allowing them to travel in a concentrated or directional beam. Diffusion materials are engineered to scatter light in a controlled way, which reduces glare, softens harsh shadows, and creates a more uniform light distribution across surfaces and spaces.
Diffusion is especially important in commercial and industrial AV systems where visual consistency affects performance. Cameras, projection systems, and display technologies rely on evenly distributed light to maintain clarity, color accuracy, and readability. By reducing bright hot spots and reflections, diffusion supports reliable imaging and comfortable viewing conditions in professional environments.
Diffusion materials are commonly used in projection screens, architectural lighting fixtures, broadcast studios, imaging stations, and controlled lighting environments. These materials may transmit light while scattering it or reflect light across broader angles to achieve the desired effect. The level of diffusion is determined by factors such as material texture, thickness, transparency, and internal structure.
High-quality diffusion media are designed to preserve usable brightness while smoothing contrast. This balance allows systems to maintain visual performance without sacrificing efficiency, making diffusion an essential component of modern AV and lighting design.
Diffusion behavior and optical performance are referenced in lighting and vision standards published by organizations such as CIE and IEC.
Diffusion was first widely used in photography and stage lighting as a method for softening illumination and creating natural-looking scenes. As AV and lighting technologies advanced, diffusion materials evolved into engineered films and surfaces designed to deliver predictable optical performance in commercial and industrial applications.