In an example, an optical system includes a fiber, a detector, and a gradient-index (GRIN) lens assembly. The GRIN lens assembly is positioned between the fiber and the detector and couples light from an exit aperture of the fiber onto the detector. The spot size of light exiting the fiber is larger than a spot size of light exiting the GRIN lens assembly. Additionally, the spot area of light exiting the GRIN lens assembly may be smaller than a sensing area of the detector. Among other advantages, the GRIN lens assembly increases the amount of light coupled onto the detector from the fiber. Additionally, the GRIN lens assembly may make the optical system more robust against vibrations (and other factors) that change the energy distribution of light exiting the fiber.

A device for the spherical orientation of an optical element is provided comprising a support structure, the optical element having an optically useful surface adapted to interact with an incident light beam, a mechanism mounted on support structure and capable of rotating the optical element in space around a first and second rotation axis perpendicular to each other.

The mechanism comprises a first rotating assembly around the first rotation axis and a second rotating assembly around the second rotation axis, which first rotating assembly has a through cavity defined around the first rotation axis, the through cavity being adapted to be crossed by the light beam and facing the optical element.

The mechanism comprises at least a first electromagnetic actuator arranged to rotate the first rotating assembly and at least a second electromagnetic actuator arranged to rotate the second rotating assembly.

An optical scanning device includes a reflector, a rotator, a first torsion beam and a second torsion beam, a first support part, a second support part, a first elastic layer, and a second elastic layer. The first elastic layer is superposed on the first torsion beam. The second elastic layer is superposed on the second torsion beam. A vertical dimension of an active layer is smaller than a horizontal dimension of the active layer in a cross section orthogonal to a direction in which the rotator is interposed between the first torsion beam and the second torsion beam. A material of the first elastic layer and the second elastic layer is higher in fatigue life than metal.

An optical scanning device includes a reflector, a rotator, a first torsion beam and a second torsion beam, a first support part, a second support part, a first elastic layer, and a second elastic layer. The first elastic layer is superposed on the first torsion beam. The second elastic layer is superposed on the second torsion beam. A vertical dimension of an active layer is smaller than a horizontal dimension of the active layer in a cross section orthogonal to a direction in which the rotator is interposed between the first torsion beam and the second torsion beam. A material of the first elastic layer and the second elastic layer is higher in fatigue life than metal.

A distance measurement apparatus of a scanning type provided with a two-dimensional micro electro mechanical system (MEMS) mirror that reflects a laser beam includes: a first detector that detects a mirror angle of the two-dimensional MEMS mirror and outputs an angular signal that indicates the mirror angle; and a processor that calculates an amplitude error and a phase error between amplitude and a phase of the angular signal and amplitude and a phase of a reference angle signal, and corrects a resonance drive waveform of a drive signal that drives, of two mutually orthogonal axes of the two-dimensional MEMS mirror, one axis on a resonance drive side on a basis of the amplitude error and the phase error.

A method, system, and computer product that track scanning data acquired by a three-dimensional (3D) coordinate scanner is provided. The method includes storing a digital representation of an environment in memory of a mobile computing device. A first scan is performed with the 3D coordinate scanner in an area of the environment. A location of the first scan is determined on the digital representation. The first scan is registered with the digital representation. The location of the 3D coordinate scanner is indicated on the digital representation at the time of the first scan.

A laser projection system is provided that includes at least one pickoff element or pickoff interface that redirects a portion of input laser light toward one or more photodetectors for purposes such as laser output power monitoring. An interface of a given pickoff element or a given pickoff interface uses Fresnel reflection to redirect the input laser light. The Fresnel reflection occurs due to a difference in indices of refraction between two materials that meet to form that interface. In some embodiments, a pickoff element is disposed in an optical path between a beam combiner and an optical scanner of the system. The pickoff element can be a plate beamsplitter, a cube beamsplitter, or a prism. In some embodiments, at least one pickoff interface is provided between two or more substrates of the beam combiner, the substrates that form a given pickoff interface having different respective indices of refraction.

The invention relates to a emitter device (8) for an optical detection apparatus (3) of a motor vehicle (1), which is designed to scan a surrounding region (4) of the motor vehicle (1) by means of a light beam (10), and which comprises a light source (13) for emitting the light beam (10) and a deflection unit (15), wherein the deflection unit (15) is designed to deflect the light beam (10) emitted onto the deflection unit (15) by the light source (13) at different scanning angles (α), wherein the deflection unit (15) comprises a freeform mirror (19). The freeform mirror (19) comprises at least two surface elements (20a, 20b) having different angles of inclination (21a, 21b) and is designed to reflect the light beam (10) in order to generate a predetermined setpoint field of view (16) of the emitter device (8) at predetermined setpoint values (−α3, −α2, −α1, α0, +α1, +α2, +α3) for the scanning angle (α), said setpoint values corresponding to the angles of inclination (21a, 21b). The invention additionally relates to an optical detection apparatus (3), a motor vehicle (1) comprising at least one optical detection apparatus (3), and to a method for generating a setpoint field of view (16) for an emitter device (8) of an optical detection apparatus (3) of a motor vehicle (1).

Display devices include waveguides with metasurfaces as in-coupling and/or out-coupling optical elements. The metasurfaces may be formed on a surface of the waveguide and may include a plurality or an array of sub-wavelength-scale (e.g., nanometer-scale) protrusions. Individual protrusions may include horizontal and/or vertical layers of different materials which may have different refractive indices, allowing for enhanced manipulation of light redirecting properties of the metasurface. Some configurations and combinations of materials may advantageously allow for broadband metasurfaces. Manufacturing methods described herein provide for vertical and/or horizontal layers of different materials in a desired configuration or profile.

An actuator device includes a support part, a first movable part, a second movable part, a first connecting part connecting the first movable part to the second movable part, a second connecting part connecting the second movable part to the support part, a spiral coil provided to the second movable part, a first external terminal provided to the support part, and a first wiring connected to an inner end portion of the coil and the first external terminal. The first wiring includes a lead wiring connected to the first external terminal, and a straddle wiring provided to the second movable part so as to straddle the coil and connected to the inner end of the coil and the lead wiring. The width of the straddle wiring is larger than the width of the coil, and the thickness of the straddle wiring is smaller than the thickness of the coil.