NIST Stray Light Elimination Tube Prototype.

摘要

Electronic projection displays involve the projection of an image, usually through a lens system, onto a viewing screen. Metrics such as light output, contrast, non-uniformity, and color gamut are used to describe the resultant image quality. Although standards exist that difine the methodology for these measurements, the accuracy of measuring the light output of projection display systems can be compromised by the condition of the viewing room. Room lights directly illuminate the screen and these light sources reflect off of walls, floors, furniture and other objects. Additionally, back-reflections from the light form the projection screen off of objects in the room and back onto the screen must be considered. The stray-light components can contribute to the measured result, providing erroneous results.