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 …

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 …

Two alternative methods for effectively reducing the speckle noise in laser based rear and
front projection displays are studied and demonstrated. Firstly, widening of the laser …

Aberration and defocusing effects in the mechanism of speckle suppression in laser
projection displays were studied using the Fresnel approximation and the thin lens model …

Speckle arises when coherent light scattered from a rough surface is detected by an
intensity detector that has a finite aperture, such as an observer. In a laser projection display …

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 …

It is well known that speckle reduction can be achieved by using multiple wavelength lasers
and angular diversity in laser projectors. However, few studies have been reported about the …

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 …

We propose using a two-level (− 1 and+ 1 as variables) orthogonal array (OA) to generate a
binary phase diffuser for speckle reduction in laser projection displays. Compared with the …

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 …