32.jpg)
56.jpg)
Device for transmitting and detecting optical beams
ES2989226
Transmitter/detector device for optical beams that pass through a lens system (10) with a group of grating couplers (110) aligned on the chip (100), built in a waveguide (120), with multiple teeth (210) with an inclination angle (θ) equal to the transmission angle of the lens system (10) arranged with a fixed tooth width (Ʌ) and a space (ε) between teeth (210), each grating coupler (110) being apodized along its length by varying the space (ε) between teeth gradually to emit a constant amount of light per unit length; where each waveguide (120) guides the input light signal within the chip (100) to each grating coupler (110) which produces a transmitted/received beam with a deflection angle (κ) determined by the tilt angle (θ) and a deviation angle (φ) determined by the wavelength of the light (λ).
A lidar (LiDAR) is a device that allows determining the distance from a laser emitter to an object or surface using a pulsed laser beam. LiDAR devices are used to capture the physical dimensions of a particular environment in three dimensions (3D), defined by an X, Y and Z coordinate system, and/or in a six-dimensional (6D) environment with X, Y coordinates , Z, along with those that define the speed of objects in the 6D environment (VX, VY, and VZ coordinates). LiDAR devices or systems are applied in advanced driving assistance systems (ADAS: Advanced Driver Assistance), in drones or automatic guided vehicles (AGV: Automatic Guided Vehicle), topography, archeology, reconnaissance of land, sensor systems, Future applications such as autonomous driving, industrial robots, image recognition, virtual/augmented reality, etc., will largely depend on a device that can detect and measure the dimensions, coordinates and distances of objects in a particular field of view with the highest degree of precision. Although a considerable amount of effort is being invested in using multiple cameras to extrapolate the potentially has a LiDAR system.