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.

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.

An oscillator control system includes an oscillator structure configured to oscillate about first and second rotation axes according to a Lissajous pattern, wherein an oscillation about the second rotation axis imparts a cross-coupling error onto an oscillation about the first rotation axis, and wherein the cross-coupling error changes in accordance with a Lissajous position within the Lissajous pattern; and a driver circuit that includes a phase-locked loop (PLL) configured to regulate a driving signal that drives the oscillation about the first rotation axis. The PLL is configured to generate a PLL signal based on a phase error of the oscillation about the first rotation axis. The PLL includes a compensation circuit configured to receive the PLL signal and the Lissajous position within the Lissajous pattern, apply a compensation value to the PLL signal to generate a compensated PLL signal used for generating the driving signal based on the Lissajous position.

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.

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).

Systems and methods are provided for measuring the mechanical properties of ocular tissue, such as the lens or corneal tissue, for diagnosis as well as treatment monitoring purposes. A laser locking feedback system is provided to achieve frequency accuracy and sensitivity that facilitates operations and diagnosis with great sensitivity and accuracy. Differential comparisons between eye tissue regions of a patient, either on the same eye or a fellow eye, can further facilitate early diagnosis and monitoring.

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 light projection method for a moving body which is performed by a processor of the moving body is provided. The method comprises: irradiating light from a light source of the moving body; scanning the light irradiated from the light source with an angle range that is formed by swing a mirror portion of an optical scanner of the moving body; acquiring change information of the angle range at which the mirror portion swings; changing the angle range at which the mirror portion swings based on the acquired change information; and changing an irradiation range of the light irradiated from the light source.

Some embodiments may include a method assessing whether a dynamic focus module in a three axis galvanometric scanning system (three-axis GSS) is associated with a focus calibration error. The method may include identifying a reference layer associated with a surface of the work piece and positive and negative offset distances each a difference distance above or below the reference layer, respectively, and selecting a target pattern based on the offset distances, wherein the pattern includes an individual line for each offset distance. The method may include commanding the three-axis GSS to draw the target pattern on the work piece, and then assessing whether the dynamic focus module is associated with the focus calibration error by correlating laser marking artifacts on the work piece to ones of the individual lines of the selected pattern. Other embodiments may be disclosed and/or claimed.

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.