Speckle reduction techniques have been investigated in display systems with coherent light
sources. We propose a simple but efficient method to reduce speckle via two fast vibrating …

We propose a system that reduces laser display speckles by vibrating the light pipe. A small
displacement of the light pipe appears to allow the total reflection of the laser, thereby …

An optical scheme for speckle suppression using two or three partially coherent beams in a
projection system is proposed. Diffractive optical elements (DOE) placed in the intermediate …

We propose a laser speckle reduction method using a fast focus tunable lens (FTL). Different
laser beams are generated after modulating the FTL. Thus, when the laser beams are used …

We report a compact, low cost, multi-color diode laser based illumination system for display
and laser-projectors. An innovative speckle reduction system based on spatially structured …

Speckle and the compound speckle can be reduced by angle diversity. In laser projection
displays, simple, low cost and efficient speckle reduction techniques require smart optical …

In this paper, the relationship between the coherence and the speckle contrast in a laser-
based projection display system is studied with the consideration of human visual percept …

Despite of much effort and significant progress in recent years, speckle removal is still a
challenge for laser projection technology. In this paper, speckle reduction by dynamic …

Speckle is the main obstacle for the use of laser light sources in projection technology. This
paper focuses on speckle suppression by the reduction of temporal coherence which is …

This paper describes a novel idea for reduction of speckle contrast in laser display
projectors using the rotation of a diffraction pattern whose zeroth order has been canceled …