Laser Projection: Coupling Optics, Light Management, and Speckle Reduction

Lasers are an interesting option as a light source for projection displays, because of their high directivity. As a result, a high brightness light source with a small beam profile, a good beam quality and good collimation characteristics is obtained. This allows the application of small light engines and display panels without loosing much intensity. As a result, a small and quite cheap projector can be gained. If the panel costs are still too high, laser sources can also be used to realize even cheaper architectures that use 1D display modules or a flying spot scanner. Additionally, the laser beam is highly monochromatic, so a projection unit using three primaries can cover a large colour gamut. The intention of this book is to give an overview on state of the art projection techniques, applicable laser sources and challenges in setting up micro- or even high power laser front projection systems.