In a general aspect, a structured optical beam with position-dependent polarizations is prepared for human observation. In some examples, an optics method includes processing an optical beam to produce a structured optical beam for human observation. Processing the optical beam includes receiving the optical beam from a laser source; attenuating the optical beam to an exposure irradiance level that is safe for direct viewing by a human eye; expanding the optical beam to a size configured for a field of view of the human eye; and preparing the optical beam with a position-dependent polarization profile. The structured optical beam, which has the position-dependent polarization profile, is directed towards an observation region for human observation.

Provided is a laser device, comprising a laser light source, a collimating lens that collimates the light output from the laser light source, and a diffuser plate that diffuses the light from the laser light source before collimating the light.

Provided is a laser device, comprising a laser light source, a collimating lens that collimates the light output from the laser light source, and a diffuser plate that diffuses the light from the laser light source before collimating the light.

A laser source assembly is provided. The laser source assembly includes a plurality of lasers, a light combining assembly and a fly-eye lens. The fly-eye lens is disposed on a light exit side of the light combining assembly, and is configured to homogenize laser beams. The fly-eye lens includes a plurality of first microlenses located on a light incident surface thereof and a plurality of second microlenses located on a light exit surface thereof. A sine value of a divergence angle of a laser beam in a fast axis direction is greater than a sine value of an aperture angle of a first microlens in a slow axis direction, and a sine value of a divergence angle of the laser beam in the slow axis direction is greater than a sine value of an aperture angle of the first microlens in the fast axis direction.

Light projection systems and methods may comprise combining light from two or more projectors. Each projector may be controlled so that the combined light output of the projectors matches a target for the projected light. In some embodiments optimization is performed to generate image data and control signals for each of the projectors. Embodiments may be applied in image projecting applications, lighting applications, and 3D stereoscopic imaging.

Light projection systems and methods may comprise combining light from two or more projectors. Each projector may be controlled so that the combined light output of the projectors matches a target for the projected light. In some embodiments optimization is performed to generate image data and control signals for each of the projectors. Embodiments may be applied in image projecting applications, lighting applications, and 3D stereoscopic imaging.

An Electrically Switchable Bragg Grating (ESBG) despeckler device comprising at least one ESBG element recorded in a hPDLC sandwiched between transparent substrates to which transparent conductive coatings have been applied. At least one of said coatings is patterned to provide a two-dimensional array of independently switchable ESBG pixels. Each ESBG pixel has a first unique speckle state under said first applied voltage and a second unique speckle state under said second applied voltage.

An Electrically Switchable Bragg Grating (ESBG) despeckler device comprising at least one ESBG element recorded in a hPDLC sandwiched between transparent substrates to which transparent conductive coatings have been applied. At least one of said coatings is patterned to provide a two-dimensional array of independently switchable ESBG pixels. Each ESBG pixel has a first unique speckle state under said first applied voltage and a second unique speckle state under said second applied voltage.

A system with a deformable membrane for speckle mitigation. In some embodiments, the system includes a laser for producing laser light; a photodetector for detecting the laser light after interaction of the laser light with a sample; and a silicon deformable membrane, for modulating the phase of the laser light.

A system with a deformable membrane for speckle mitigation. In some embodiments, the system includes a laser for producing laser light; a photodetector for detecting the laser light after interaction of the laser light with a sample; and a silicon deformable membrane, for modulating the phase of the laser light.