Speckle is visible noise within a projected image. Speckle occurs when a rough surface (optical component or projection screen) is illuminated by coherent light. It is present in all illumination sources and is best described as a shimmering or sparkle effect. Speckle severity can vary depending upon illumination source, optical architecture, projection screen and viewer perception.
In the IMAGE Conference Paper titled “Speckle Characteristics of True Solid-State Illumination Technology Projectors” by Norxe, the authors discuss the speckle characteristics of simulation projectors using true solid-state illumination technology. They explain what the artefact is, why it occurs, why it matters and how it should be measured prior to concluding that some solid-state illumination technology projectors and projection screen combinations exhibit noticeably less speckle than others.
Speckle is visible noise within a projected image. Speckle occurs when a rough surface (optical component or projection screen) is illuminated by coherent light. It is present in all illumination sources and is best described as a shimmering or sparkle effect. Speckle severity can vary depending upon illumination source, optical architecture, projection screen and viewer perception.
Read: Norxe’s Image Conference Paper “Speckle Characteristics of True Solid-State Illumination Technology Projectors”.
Primary Author: Craig Maddock, Director Product Support, Norxe , Co-Author: Kjell Einar Olsen, CEO, Norxe, Co-Author: Tobby Simonsen, Sr. Optical Engineer, Norxe