The composite beam 734 is provided to a single detector 736, which may be a low cost, wideband photodetector, since it is only detecting the beat frequencies (lambdan+/-fn). The electrical output of the detector 736 is provided on a line 738 to six bandpass (IF) filters 740a through ...
Previously, sensing technologies that have been used in the presence of obscurants include RADAR based sensors53,54, and passive sensors based on thermal imaging55,56. There has been some previous work on using LiDAR for imaging through obscurants, but this was mostly laboratory-based work or ...
20060071846Coherent laser radar2006-04-06Yanagisawa et al. 6950733Method of controlling an external object sensor for an automotive vehicle2005-09-27Stopczynski 20050033497Method of controlling an external object sensor for an automotive vehicle2005-02-10Stopczynski ...
Previously, sensing technologies that have been used in the presence of obscurants include RADAR based s ensors53,54, and passive sensors based on thermal imaging55,56. There has been some previous work on using LiDAR for imaging through obscurants, but this was mostly laboratory-based...
In this manner the beams are adjusted to be accurately parallel in a "Gatling Gun" configuration, and are all directed at rotating beam displacer 206. The rotating beam displacer 206 rotates about the transmitter axis and contains two mirrors, one of which, the mirror 206a, is disposed at ...
various research groups and companies [3]. Among these sensors, LiDAR has received widespread attention owing to its high resolution, accuracy, and ability to generate three-dimensional maps, as well as the fact that it is not as affected by rain and fog, in contrast to radar and cameras [...
This simple relation in Equation (4) also explains why millimeter wave radar has great challenges in achieving image grade resolution with reasonable size and cost. 4.1.2. Beam Steering Range The requirement on the range of beam steering or FOV is comparably less stringent. Axial rotation-based ...
consisting of an active system to simultaneously measure the distance and intensity of every point in the scene, by monitoring the time between the emitted and received light pulse, usually called by Time of Flight (ToF), using the same principle as radio detection and ranging (RADAR), develope...
However, radar and hyperspectral imagery cannot be used to directly retrieve water depth, and photogrammetry requires very clear water conditions [3]. Meanwhile, their precision is relatively poor, and they cannot provide a high-resolution distribution (errors in the order of 1 m) [4–6]. ...