A LiDAR apparatus includes a first substrate, a laser diode on a surface of the substrate for outputting light, a fast axis collimator (FAC) lens receiving the light and generating an at least partially collimated light beam, a polarizing beam splitter optically coupled to the FAC lens, at least a portion of the light beam passing through the polarizing beam splitter to a region being observed by the LiDAR apparatus. An opaque coating on the back side of an aperture element coupled to the polarizing beam splitter is patterned to provide a transparent aperture. At least a portion of light returning to the LiDAR apparatus from the region being observed is directed by the polarizing beam splitter, through the transparent aperture in the opaque coating on the aperture element, through the at least partially reflective optical element to an optical detector mounted on the substrate.

A non-imaging concentrator is employed in an upside down configuration in which light enters a smaller aperture and exits a larger aperture. The input angle of light rays may be as large as 180 degrees, while the maximum exit angle is limited to the acceptance angle of the non-imaging concentrator. A dichroic filter placed at the larger aperture has a maximum angle of incidence equal to the acceptance angle of the non-imaging concentrator.

A transmission unit for a LIDAR device for emitting collimated beams into a scanning area. The transmission unit includes at least one beam source for generating beams in the form of a beam bundle, the beam source being designed as a surface emitter or an emitter array, and a transmission optical unit including at least one lens. The transmission unit includes a diaphragm including at least one aperture, which is configured to delimit a cross section of the beam bundle of the generated beams in a horizontal direction and/or a vertical direction. The at least one lens of the transmission optical unit is situated downstream from the diaphragm in the emission direction of the beams. A LIDAR device is also described.

Various embodiments may relate to an optical system. The optical system may include a lens structure configured to generate an outgoing Gaussian beam based on an incoming Gaussian beam. The optical system may also include a light source configured to provide the incoming Gaussian beam to the lens structure. The lens structure may be a flat lens or a phase plate.

An image display apparatus according to an embodiment of the present technology includes a plurality of display units. Each of the display units includes a screen on which an object image is formed; and a diffractive optical element that includes a first surface and a second surface that is situated opposite to the first surface, the diffractive optical element diffracting image light of the object image that enters the first surface, and causing the image light to exit the first surface, the diffractive optical element displaying a virtual image of the object image on a side of the second surface such that the virtual image is superimposed on a background. The diffractive optical elements of a plurality of the diffractive optical elements included in the display units are each arranged to at least partially surround a specified axis in a state in which the second surface faces the specified axis.

The present invention discloses a solder paste laser induced forward transfer device and method. The device comprises a laser, a beam shaping module, an optical path adjustment module, a solder paste transfer module and a computer control system, wherein the laser is connected to the beam shaping module, followed by the optical path adjustment module, and the solder paste transfer module is located below the optical path adjustment module. The beam shaping module comprises a beam expanding lens, an aperture, a flat-top beam shaper and a spatial light modulator. The optical path adjustment module comprises a two-dimensional galvanometer and an f-θ lens. The solder paste transfer module consists of a transparent substrate, a solder paste film, a clamp, a Z-axis lifting table, a receiving substrate, and an XYZ precise moving platform. The computer control system consists of a computer and drivers of other devices. The device and method can achieve mask-free, non-contact and high-precision solder paste transfer, thereby greatly shortening the production cycle and reducing the production cost.

LIDAR systems, and methods of measuring a scene are disclosed. A laser source emits one or more optical beams. A scanning optical system scans the optical beams over a scene and captures reflections from the scene. A measurement subsystem independently measures the reflections from N subpixels within each scene pixel, where N is an integer greater than 1, and combines the measurements of the reflections from the N subpixels to determine range and/or range rate for the pixel.

A beam shaper (1) for shaping a laser beam is provided, including a first beam shaping section (2) designed for shaping a central part of the laser beam, and a second beam shaping section (3) designed for shaping a peripheral part of the laser beam. Moreover, a device for laser beam treatment of a workpiece and a method for laser beam treatment of a workpiece are provided.

An optical imaging lens may include a first, a second, a third, a fourth, a fifth and a sixth lens elements positioned in an order from an object side to an image side. The optical imaging lens may satisfy AAG/(T3+T6)≥2.500, wherein a sum of five air gaps from the first lens element to the sixth lens element along the optical axis is represented by AAG, a thickness of the third lens element along the optical axis is represented by T3, and a thickness of the sixth lens element along the optical axis is represented by T6.

Dual or multi-modulation display system are disclosed that comprise projector systems with at least one modulator that may employ non-mechanical beam steering modulation. Many embodiments disclosed herein employ a non-mechanical beam steering and/or polarizer to provide for a highlights modulator.