An illuminator usable for illuminating a display panel is disclosed. The illuminator uses a pupil-replicating waveguide to expand a pair of light beams propagating in the waveguide. The light beams may be coupled at a same edge and/or at opposite edges of the waveguide, and are configured to fill each other's dark spots between out-coupled beam portions of the light beams. To improve the illumination uniformity, the two light beams may be orthogonally polarized, and the out-coupling grating strength may be spatially varied along the waveguide.

A fractional handpiece and systems thereof for skin treatment include a passively Q-switched laser assembly operatively connected to a pump laser source to receive a pump laser beam having a first wavelength and a beam splitting assembly operable to split a solid beam emitted by the passively Q-switched laser assembly and form an array of micro-beams across a segment of skin. The passively Q-switched laser assembly generates a high power sub-nanosecond pulsed laser beam having a second wavelength.

A method of operating an apparatus for laser annealing, includes reducing temporal or spatial coherency of a plurality of laser beams by beam superimposing; and reducing an electric field inner product magnitude of beams having the reduced temporal or spatial coherency by a fly eye lens array to reduce coherency, and/or by modifying a polarization state between the beams by beam superimposing.

Metasurface elements, integrated systems incorporating such metasurface elements with light sources and/or detectors, and methods of the manufacture and operation of such optical arrangements and integrated systems are provided. Systems and methods for integrating transmissive metasurfaces with other semiconductor devices or additional metasurface elements, and more particularly to the integration of such metasurfaces with substrates, illumination sources and sensors are also provided. The metasurface elements provided may be used to shape output light from an illumination source or collect light reflected from a scene to form two unique patterns using the polarization of light. In such embodiments, shaped-emission and collection may be combined into a single co-designed probing and sensing optical system.

A laser beam combining apparatus, and a combined stepped reflector and a filling rate calculation method thereof are disclosed. The laser beam combining apparatus includes a two-dimensional light-emitting array and the combined stepped reflector used to reflect a plurality of laser beams emitted by the two-dimensional light-emitting array. The combined stepped reflector is composed of a plurality of reflective mirrors that have the same length but sequentially increasing widths and that are stacked in succession, where the distance between centers of the laser beams reflected by the combined stepped reflector is smaller than the distance between centers of the laser beams prior to the incidence, thus increasing the filling rate of the laser beams emitted by the two-dimensional light-emitting array. A method for calculating the filling rate of the laser beam combining apparatus is also provided.

An anti-motion sickness device fitted to a motor vehicle including a triaxial accelerometer to detect the vehicle accelerations along three axes and to emit a corresponding acceleration signal; a display component of light markers to form at least one first and second artificial horizon lines at first and second inner surface, respectively of the motor vehicle. The device includes a control unit for receiving the acceleration signals and for driving the display wherein the artificial horizon lines are aligned in a horizontal plane perpendicular or substantially perpendicular to the gravity vector regardless of vehicle accelerations. The control unit is configured to process the acceleration signals, prior to the control of the display to determine in real time an acceleration frequency according to each of the accelerometer axes and to drive the display only when the acceleration frequency is below a threshold frequency, below which the motion sickness likely occurs.

An imaging apparatus has one or more lenses with a common optical axis and that define an image plane. A splitting optic is disposed to split the light along the optical axis to provide, at the image plane, at least a first copy of an image at a first magnification and a second copy of the image at a second magnification different from the first magnification.

A virtual image generation system comprises a planar optical waveguide having opposing first and second faces, an in-coupling (IC) element configured for optically coupling a collimated light beam from an image projection assembly into the planar optical waveguide as an in-coupled light beam, a first orthogonal pupil expansion (OPE) element associated with the first face of the planar optical waveguide for splitting the in-coupled light beam into a first set of orthogonal light beamlets, a second orthogonal pupil expansion (OPE) element associated with the second face of the planar optical waveguide for splitting the in-coupled light beam into a second set of orthogonal light beamlets, and an exit pupil expansion (EPE) element associated with the planar optical waveguide for splitting the first and second sets of orthogonal light beamlets into an array of out-coupled light beamlets that exit the planar optical waveguide.

The present invention provides an apparatus and method for optical centering of lenses, potentially to be used for automatic accurate alignment and bonding of said lenses into an imaging system. The non-rotating lens centering device includes a motorized focusing autocollimator, one or two aiming lasers coupled to the motorized focusing autocollimator, and an optical laser redirector such as retro-reflectors or beam splitters and mirrors. The system may comprise an imaging device for alignment and beam profiling, a computer device and algorithms for data analysis to provide information related to centering offsets to be corrected. Motorized correcting system will realign and eliminate the unwanted decentering and adjustment of the lens.

An optical coherence tomography (OCT) engine includes a digital Fourier-Transform (dFT) spectrometer, a tunable delay line, and a high-speed optical phased array (OPA) scanner integrated onto a single chip. The broadband dFT spectrometer offers superior signal-to-noise ratio (SNR) and fine axial resolution; the tunable delay line ensures large imaging depth by circumventing sensitivity roll-off; and the OPA can scan the beams at GHz rates without moving parts. Unlike conventional spectrometers, the dFT spectrometer employs an optical switch network to retrieve spectral information in an exponentially scaling fashion—its performance doubles with every new optical switch added to the network. Moreover, it also benefits from the Fellgett's advantage, which provide a significant SNR edge over conventional spectrometers. The tunable delay line balances the path length difference between the reference and sample arms, avoiding any need to sample high-frequency spectral fringes.