20-02-2010, 10:18 PM
SIR, please send me the full details about LADAR and ppts, if there.
20-02-2010, 10:18 PM
SIR, please send me the full details about LADAR and ppts, if there.
21-02-2010, 12:14 PM
LADAR.ppt (Size: 844.5 KB / Downloads: 195) LADAR INTRODUCTION LADAR “ Laser Detection And Ranging Operates on same principle as that of RADAR Combines capabilities of radar & Optical system Operates at shorter wavelength LASER SOURCES IN LADAR Nd:YAG in military application (R=2000m to10k.m.) Chemical lasers(penetrates through fog & smoke) Solid state laser Methods to Judge Distances with Ladar 1.Measuring the time between transmission and return of a signal 2.Measuring the intensity of the returned signal 3.Using stereo vision 4.Using Laser striping 5.Using optical flow SCANNING PROBLEMS WITH LADAR 1.Mixed Pixels 2.Reflectance Crosstalk 3.Temporal Mixing 4.Photon Noise 5.Intensity Drift 6.Dark Obstacles 7.Other Considerations ADVANTAGES Provides higher resolution Very narrow beam spread Fewer sources of interference Better ability to track deccelerating object DISADVANTAGES ¢ Depends on weather ¢ Depends on reflection of the surface ¢ Difficult to track the target ¢ Particles in air will affect the range APPLICATIONS Atmospheric pollution measurement Construction imaging and mapping Eye surgery Land surveying Mapping Vehicle speed measurement CONCLUSIONS Ladar is, in the correct environment, better suited for speed detection Ladar is not perfect, however There is still room for Radar patrolling
21-05-2010, 07:35 PM
The acronym of LADAR (Laser Detection and Ranging) is LIDAR (Light Detection And Ranging) which is an optical remote sensing technology that measures properties of scattered light to find range and/or other information of a distant target,Applications of LIDAR include ALSM (Airborne Laser Swath Mapping), laser altimetry or LIDAR Contour Mapping. and the range to an object is determined by measuring the time delay between transmission of a pulse and detection of the reflected signal
read more http://en.wikipediawiki/LIDAR http://www.ee.buffalo.edu/faculty/cartwr.../lasar.pdf http://defense-updateproducts/l/ladar.htm |
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