UK: Selex, a Finmeccanica company that develops electronic and information technologies for defence systems, aerospace, data, infrastructures, land security and protection, has developed a LiDAR system that uses a Geiger-mode (GM) array for single photon counting.
Figure 1. (a) The Selex Geiger-mode (GM) lidar (light detection and ranging) system. (b) A line-of-sight (LOS) view obtained during a test of the lidar system. The target tree is at a distance of about 9km. (c) Image from the lidar telescope, showing the tree within the GM camera's field of view (white box).
The new system records range and depth profiles to a precision of less than 4 cm. It also penetrates through clutter, such as foliage and tree canopies. The data is recorded from a single vantage point, but the canopy’s shape and partially occluded terrain behind it can be measured with high accuracy, researchers said. This work represents advanced GM time-of-flight sensing developments Selex conducted to improve 3D lidar, hyperspectral, and polarimetric imaging concepts for airborne targeting and surveillance.
The company claims that GM LiDAR can clearly be applied to military remote sensing operations. In these situations fibre lasers operating at low pulse energy and high repetition rate offer advantages over solid-state lasers that operate at high pulse energy and low repetition rate. The results and findings were published online by SPIE, which is an international society advancing an interdisciplinary approach to the science and application of light.