This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
1Geiger-Mode Sensing Technology
1Geiger-mode Sensing Technology
• Frisbee players at 50 meters
• Green car (15% reflectance) at 150 meters
• Black motorcycle (3% refl.) at 250 meters
• 60 mph highway traffic, at 350 meters
Geiger-mode LiDAR Sensing Technology
2Geiger-Mode Sensing Technology
Geiger-mode LiDAR –The Dawn of Digital Mapping
Peter Kostoulas, Sr. Applications Engineer
3Geiger-Mode Sensing Technology
3Geiger-mode Sensing Technology
• Expertise in indium phosphide lasers and avalanche photodiodes (APDs)
• Pioneers in single-photon, Geiger-mode sensing technology
• Specialization in long-range 3D LiDAR imaging to < 3 cm resolution
• Staff of 50, with over half holding advanced technical degrees
• Customers are leaders in their respective industries around the globe
• Autonomous navigation
• Defense/targeting
• 3D mapping
• Quantum communications
• Satellite tracking and long free-space optical communications
Introduction to Princeton Lightwave
4Geiger-Mode Sensing Technology
4Geiger-mode Sensing Technology
• What is Geiger-mode?
• Some aspects of Geiger-mode detection technology
• Imaging with Geiger-mode cameras
• Applications
• Mapping
• Disaster Management
• Resource Management
• Autonomous navigation, including driverless cars
High Accuracy, High Resolution Geiger-mode Cameras
Model ArrayTiming
(ps)
Accuracy
(cm)
Returns
per
second
Blind
Readout
time (µsec)
Framed Data Output
Kestrel 32 x 32 250 3.75 200 M 3
Falcon 128 x 32 500 7.5 400 M 7
Free Running Data Output
Merlin 32 x 32 300 4.5 800 M N/A
10 x 10 x 10 cm3
New!
17Geiger-Mode Sensing Technology
17Geiger-mode Sensing Technology
Laser Rx with
CameraScanner
Position
(INS)
Sys. Control & Data
Acquisition ComputerOperator
Data Storage
LiDAR Functional Block Diagram
3D LiDAR Imaging with Laser and Gm Camera
Courtesy of
Harris Corp
Laser & camera
embedded in
scanner
~ 40 x 40 x 40 cm3
18Geiger-Mode Sensing Technology
18Geiger-mode Sensing Technology
Geiger-mode maximizes resolution at long-range
Images courtesy of Harris Corp.
Linear-mode Geiger-mode
• From 8 km altitude, Geiger-mode provides ten times higher resolution
Details such
as power
lines and
shrubs now
visible
Significant
infrastructure detail
enhances disaster
response initiatives
19Geiger-Mode Sensing Technology
LiDAR in Resource Management
Courtesy of Harris Corp
What Can Geiger-mode Deliver?
• High level of detail
– Resolution capability that
surpasses USGS QL1 (8 pts/m2)
– Rich point cloud
• Ability to image below canopies
• Lower cost of obtaining data
– Ability to scan more often,
which enables tracking
changes more frequently and
effectively
– Ability to manage larger areas
due to time and cost savings
20Geiger-Mode Sensing Technology
LiDAR in Disaster Management
• Enhanced speed of collection
– Higher altitude operation allows more coverage in shorter time period
– Time is critical for disaster response
• Resolution capability that surpasses USGS QL1 (8 pts/m2)
– Provides detail information regarding power lines and other critical
infrastructure
– Enhanced ability to identify transportation link breakdowns for first
responders
• Lower cost of obtaining data
– Enables multiple passes for ‘before’ and ‘after’ or for situation updates
What Can Geiger-mode Deliver?
7 km aerial imaging at 20 pts/m2, McGuire Nuclear Station, N.C. Uses Falcon 128x32 Geiger-mode LiDAR Camera Courtesy of Harris Corporation. Ref: W. E. Clifton, B. Steele, G. Nelson, A. Truscott, M. Itzler, M.
Infrastructure Details Critical to Disaster Relief
7 km aerial imaging at 20 pts/m2, McGuire Nuclear Station, N.C. Uses Falcon 128x32 Geiger-mode LiDAR Camera Courtesy of Harris Corporation. Ref: W. E. Clifton, B. Steele, G. Nelson, A. Truscott, M. Itzler, M.