We report on a novel speckle reduction scheme using microlens arrays as screen material
for application in laser-based projection systems. The scheme is based on properly …

We have developed illumination optics for image projection systems. It realizes uniform
illumination and suppression of speckle and diffraction noises by using a diffuser and …

We use projection screens filled with colloidal dispersions to reduce laser speckle in laser
projection systems. Laser light is multiply scattered at the globules of the colloidal …

“Objective” speckle arises from the uneven illumination of an object with a multiplicity of
waves that interfere at its surface.“Subjective” speckle arises at rough objects even if they …

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 …

A running screen method is applied to remove hot spot speckle on projection screen by a
laser display system with one DLP panel. We have commercially displayed a projection …

The output speckle statistics are affected by deterministic aberrations present in an imaging
system when the speckle is only partially developed. The speckle-power spectral density …

We propose a method based on quantitative theoretical analysis for achieving speckle
contrast of 1% or less in images created by a full-frame laser projection display system. The …

A theory is presented which relates the minimum detectable contrast level for an object in
the presence of noise to the statistics of the speckle. Consideration is given to smoothing of …

An experiment was performed to study the correlation between laser speckle patterns
obtained at different wavelengths at a fixed point at the image plane. Results agree with a …