Utilization the method of suppressing speckle are diversity of Angle, diversity of polarization, independent sources, perturbation techniques and others, appear the quality picture without visible speckle.
Mie scattering for speckle suppression technique
The patent based on the scattering speckle suppression theory. The nanocomposite polymer is used for the design process of optical device, resulting in the Mie scattering mechanism of the laser nanoparticles scattering. when the laser through the optics that have Mie scattering mechanism, the phase of the outgoing light will change. So the speckle pattern produce a rich variation, the speckle pattern will be superimposed on the basis strength, that will reduce the observed speckle contrast.
Multiple independent light sources for suppression technique
The patent technology is based on selection of laser sources that have different wavelengths, so multiple independent light source produce independent speckle pattern. Utilization integrated programs that is patented configuration of the laser light, in order to achieve integrated beam which different wavelengths of light finish reflecting and transmission. this advantage of this technique suppress laser speckle effectively, remove the matt area, and reduce volume coupling unit.
Diverity of angle for speckle suppression technique
The patent technology design diversity of the incidence light angle in order to achieve speckle suppression.
Perturbation drive for speckle suppression technique
The patent design the perturbation-sensitive device, so that the optics and the reflective optical cavity can be sensitive to external perturbations and occur follower. thereby causing incident status (including the incident angle, the incident position, the incident process) changes continuously when incident light beam entrance the reflective cavity, so traveling direction and path of the incident laser scatter light changes randomly in the transparent material. Finally, The optical reflector cavity surface emitting scattering light which the distribution of phase and angles change randomly, to achieve the purpose of eliminating speckle.
Diversity polarization for speckle suppression technique
The patent technology combines with the integration time of human eye discerning image. The laser speckle can be suppressed further by adjustment the direction of polarization of the incident laser light source within 1/30S achieving diversity of polarization on the screen.
