A driving controller provides a first driving signal having a first driving frequency to a first actuator that causes a mirror portion to swing around a first axis, provides a second driving signal having a second driving frequency to a second actuator that causes the mirror portion to swing around a second axis intersecting with the first axis, and derives a first driving condition of the first actuator under which the first driving frequency is less than a first resonance frequency around the first axis.

A driving controller provides a first driving signal having a first driving frequency to a first actuator, provides a second driving signal having a second driving frequency to a second actuator, derives a first average phase delay time by averaging a first phase delay time of an output signal of a first angle detection sensor with respect to the first driving signal in a plurality of cycles, derives a second average phase delay time by averaging a second phase delay time of an output signal of a second angle detection sensor with respect to the second driving signal in a plurality of cycles, generates a first reference signal based on the first driving signal and the first average phase delay time, and generates a second reference signal based on the second driving signal and the second average phase delay time.

Systems and methods for determining the resonant frequencies of at least one axis of a two-axis resonant light scanner based on a measured resistance of at least a portion of one of the axes are disclosed. Precise knowledge of the resonant frequencies of each axis enables quasi-closed-loop operation of a light scanner, wherein the resonant frequencies of its axes can be periodically updated to ensure the proper drive frequencies are used. Furthermore, by determining the relationship between the measured resistance and scanner angle, calibration of the scanner is facilitated and even enabled at the wafer level during fabrication. In some cases, it also enables real-time monitoring of scanner position. Scanners in accordance with the present disclosure are suitable for use in any application that requires one or more reflective elements that can be scanned or steered in at least one dimension.

A method for super-resolution photoacoustic microscopy of an object. The method includes optically exciting the object according to a plurality of excitation patterns utilizing a digital micromirror device (DMD), receiving a plurality of acoustic waves propagated from the object due to optically exciting the object, reconstructing each of a plurality of photoacoustic (PA) images from a respective acoustic wave of the plurality of acoustic waves, and obtaining a super-resolution PA image of the object from the plurality of PA images by applying a frequency domain reconstruction method to the plurality of PA images. Each of the plurality of acoustic waves are associated with a respective excitation pattern of the plurality of excitation patterns.

A laser based vascular illumination system utilizing a FPGA for detecting vascular positions, processing an image of such vasculature positions, and projecting the image thereof onto the body of a patient.

A light projection system includes a base, a lens, and a set of flexures flexibly attaching the lens to the base. The light projection system further includes a board fixedly attached to the base, and a light source mounted on the board and spaced apart from the lens along an optical axis of the lens. The light source is configured to emit a light beam to be projected by the lens toward a scene. The light projection system further includes a driving mechanism configured to scan the lens via the set of flexures in a plane substantially perpendicular to the optical axis of the lens, thereby scanning the light beam emitted by the light source over the scene.

The embodiments described herein include scanners that can provide improved scanning laser devices. Specifically, the embodiments described herein provide scanners with a modular construction that includes one or more separately formed piezoelectric actuators coupled to a microelectromechanical system (MEMS) scan plate, flexure structures, and scanner frame. Such modular scanners can provide improved scanning laser devices, including scanning laser projectors and laser depth scanners, LIDAR systems, 3D motion sensing devices, gesture recognition devices, etc.

An electronic device may include sensors such as a visible-light image sensor for capturing images. The sensors may also include optical sensors that operate at other wavelengths. An infrared light sensor may be used to gather an infrared light spectrum of a target object. The infrared light sensor may have a beam steerer and other adjustable components such as adjustable lenses and adjustable polarizers. During operation, an infrared beam emitted by the infrared light sensor may be steered onto the target object using information from a captured visible-light image and/or other sensor data such as distance sensor data, orientation sensor data, three-dimensional image sensor data, and data from other sensors. Infrared spectra, visible-light camera images, and/or data from other sensors may be used in characterizing target objects so that notifications can be provided to a user and other actions taken.

A mirror device includes a frame body, a shaft member provided inside the frame body and connected to the frame body at both end portions, and a reflection member fixed to the shaft member and provided so as to be capable of swinging around an axis of the shaft member. The reflection member has a base portion provided along an axial direction of the shaft member and a reflection portion provided on the base portion. The base portion has a three-dimensional uneven structure including a bottom wall portion having a main surface provided along the axial direction of the shaft member and a plurality of side wall portions extending from the bottom wall portion on the side opposite to the reflection portion.

The techniques disclosed herein provide apparatus, methods and systems that adaptively adjust the signal waveform (or waveshape) of the drive signal to a slow-scan mirror to compensate for non-linearities observed in the slow-scan feedback signal from a slow-scan mirror. Over large scan angles and high temperatures, the slow-scan mirror in a laser beam scanning device may exhibit a nonlinear response to the drive signal that results in poor image quality issues such as bright lines, bands in the display image, and image distortion. The presently disclosed technologies track the linearity performance of the overall system by detecting non-linearities in waveform of the slow-scan feedback signal real time, and consequently apply a pre-distortion to the drive waveform to compensate for these detected non-linearities. The parameters, logic and blocks of the control may be implemented in hardware, software or combinations thereof.