A laser array light source for optical scanning

Abstract

The invention discloses a laser array light source for optical scanning, which is composed of n rows×m columns of array elements arranged on an expandable frame, the array elements are individually packaged individuals, and the array elements include pressure ring, collimating lens, adjusting spacer, laser diode, pre-driving circuit, socket, metal casing and silicone; the base includes upper and lower fixed partitions arranged in parallel, with n rows×m columns of arrays The vertical array of elements is arranged between the upper and lower fixed partitions, and the array elements are parallel to each other. The invention adopts the package structure to greatly improve the heat dissipation effect of the device, and cooperates with the double-structure grating device to realize the multi-beam phased array scanning laser irradiation. For the array laser irradiation light source, the failure of individual single semiconductor laser diodes will not cause the array function to fail. The overall failure greatly improves the reliability and applicability of the device, and also expands the application of laser detection technology.

Description

technical field [0001] The invention relates to the field of optical phased array technology in the field of optical detection, in particular to a laser array light source for optical scanning. Background technique [0002] At present, with the rapid development of artificial intelligence technology, target detection, weapon guidance, unmanned driving, autonomous obstacle avoidance and other application fields urgently need a fast, accurate and all-round target detection technology. Radar is the most commonly used detection method. Compared with the radar of traditional mechanical scanning technology, phased array scanning technology uses a large number of independently controlled small antenna units arranged into an antenna array, and each antenna unit is controlled by an independent phase shift switch. By controlling the phases emitted by each antenna element, beams of different phases can be synthesized. Inspired by phase-controlled electronically scanned array radar, so...

AI Technical Summary

Problems solved by technology

However, solid-state lidar also has its corresponding shortcomings. In addition to the central bright pattern, grating diffraction will also form other bright patterns. This problem will cause the laser to form side lobes outside the direction of maximum power and disperse the energy of the laser; especially for optical phased arrays. It is required that the size of the array unit must not be greater than half a wavelength. Generally, the current working wavelength of the laser radar is about 1 micron, so the size of the array unit must not be greater than 500nm

Images