Speckle reduction methods in laser-based picture projectors
Laser sources have been promised for many years to be better light sources as compared to
traditional lamps or light-emitting diodes (LEDs) for projectors, which enable projectors …
traditional lamps or light-emitting diodes (LEDs) for projectors, which enable projectors …
Compact passive system for speckle-free uniform illumination in RGB laser projectors based on incoherent focusing
A theoretical analysis of the hardware mechanisms for subjective speckle suppression in
RGB laser projectors has revealed that achieving a compact speckle-free passive laser …
RGB laser projectors has revealed that achieving a compact speckle-free passive laser …
Speckle contrast for superposed speckle patterns created by rotating the orientation of laser polarization
For a rough diffuser that fully depolarizes a linearly polarized laser, the speckle contrast of a
fully developed speckle image can be reduced from 1 to 0.5 by polarization diversity. This …
fully developed speckle image can be reduced from 1 to 0.5 by polarization diversity. This …
Very efficient speckle suppression in the entire visible range by one two-sided diffractive optical element
The impact of the precision and direction of motion of a two-dimensional (2D) diffractive
optical element (DOE) based on binary pseudo-random sequences on speckle suppression …
optical element (DOE) based on binary pseudo-random sequences on speckle suppression …
Full speckle suppression in laser projectors using two Barker code-type diffractive optical elements
The mathematical model of a speckle-suppression method based on two Barker code-type
diffractive optical elements (DOEs) moving in orthogonal directions is developed. The …
diffractive optical elements (DOEs) moving in orthogonal directions is developed. The …
Optimal speckle suppression in laser projectors using a single two-dimensional Barker code diffractive optical element
A Lapchuk, A Kryuchyn, V Petrov, V Klymenko - JOSA A, 2013 - opg.optica.org
An effective method of speckle suppression using one 2D diffractive optical element (DOE)
moving with constant velocity based on the periodic Barker code sequence is developed …
moving with constant velocity based on the periodic Barker code sequence is developed …
Dispersion of speckle suppression efficiency for binary DOE structures: spectral domain and coherent matrix approaches
We present the first general theoretical description of speckle suppression efficiency based
on an active diffractive optical element (DOE). The approach is based on spectral analysis of …
on an active diffractive optical element (DOE). The approach is based on spectral analysis of …
Speckle reduction using phase plate array and lens array
M Xiaohui, A Wang, F Ma, S Wu, H Ming - Opto-Electronic Advances, 2020 - oejournal.org
In this paper, a solution for speckle reduction using phase plate array (PPA) and lens array
(LA) in a motionless way is proposed. The specially designed PPA is composed of sub …
(LA) in a motionless way is proposed. The specially designed PPA is composed of sub …
Speckle reduction in laser picoprojector by combining optical phase matrix with twin green lasers and oscillating MEMS mirror for coherence suppression
The combined speckle reduction method is proposed and designed for laser picoprojectors
taking small size, high optical power, and good image preservation into account. An optical …
taking small size, high optical power, and good image preservation into account. An optical …
Improved active tracking performance through a Hadamard speckle contrast reduction
EL Jenkins, DJ Burrell - Optics Letters, 2023 - opg.optica.org
We report wave-optics simulation results and benchtop experimental findings that
demonstrate reduced centroiding error through a Hadamard speckle contrast reduction …
demonstrate reduced centroiding error through a Hadamard speckle contrast reduction …