Electronic ceramic substrates have been widely used in various markets, which include the automotive industry, electronics, aviation, and sensor due to their good thermal conductivity and thermal stability. The holes in ceramic substrates are very important for their application, many techniques are studied to drill holes of different sizes. This research presents the results of UV ultrashort pulse laser drilling of ceramic substrates with different laser parameters. Normally, the ultrashort pulse laser can be used to process materials due to its less heat-affected zone, so the heat-affected zone of the hole is also observed around the laser-drilled holes.
A key and hot problem in LiDAR is on the development of solid-state LiDAR in intelligent driving field. The disadvantage of solidstate LiDAR technology limits itself in mass production and wider application. A mixed solid-state LiDAR system based on SiPM detecting technology is proposed and realized to be fulfilled as the core guiding, positioning and anti-colliding sensor in intelligent driving vehicle, with wide detecting range, fast refreshing frequency and point density, and wide FOV. Firstly, the background of LiDAR is briefly introduced. Then, A mixed solid-state LiDAR system configured with a 1D MEMS and a motor is designed. After assembly, it has all needed functions and has be tested in indoors and outdoors. The results and data indicated this SiPM technology can be utilized in the mixed-solid state LiDAR to realize wide range, high point density and wide FOV, which can match with the requirement of current intelligent driving system.
The technology of compounding LIDAR with visible imaging topographic mapping in space is firstly proposed in this paper. We introduce the design project of integration for laser and visible system in detail, and create the geometrical model for LIDAR Compounded with Visible Imaging Topographic Mapping. Using simultaneous adjustment test with true satellite data, it is verified that the system of LIDAR compounded with visible Imaging topographic mapping meets the designed technology index.
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