Reduction of speckle contrast in laser based HDTV projection displays

• Main Author: Lifjeld, Anders
• Format: Others
• Language: English
• Published: Norges teknisk-naturvitenskapelige universitet, Institutt for elektronikk og telekommunikasjon 2007
• Subjects: ntnudaim; SIE6 elektronikk; Fotonikk og mikroteknologi
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9636

In this assignment the theoretical background for the nature of speckle is presented and practical work was done to reduce the speckle effect in a display system based on a laser source. This was done without any picture modulators, or any kind of line scan or flying spot scanning. Work was done to find the right setup to be able to as easy as possible characterize the statistics of the speckle in an image. A still image of an expanded laser spot worked as an image. A series of test sets were carried out to address the different factors which could make a difference on the speckle contrast and their role in such systems.