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SUNVISION TECHNOLOGY
PVT LTD
www.sunvision.in
 Lidar = Light Detection And
Ranging
 Laser scanning techniques give:
-geometry
-intensity
-phase of reflected wave train
-cooler
www.sunvision.in
3D Laser Scanning
‱ There are two primary types of 3D Laser Scanning:
time-of-flight scanners and phase-shift scanners.
‱ Time-of-flight laser scanners emit a pulse of laser
light that is reflected off the scanned object. A sensor
measures the time of flight for the optical pulse to
travel to and from the reflected surface. The distance
the pulse traveled is then calculated using the
following equation:
Distance = (Speed of Light * Time of Flight)/2
www.sunvision.in
‱ In phase-shift scanners, a laser beam with sinusoid ally
modulated optical power is emitted and reflected off an
object. The reflected light is then detected and compared
with the emitted light to determine the phase shift. The
time of flight can then be determined from the following
equation:
Time of Flight = Phase Shift / (2* Modulation
Frequency).
‱ The values calculated are then substituted in to the first
equation to find the distance.
Very-High Speed Time-of-flight Pulsed
Laser, excellent range and capable of
single point surveying;
Integrated High-Resolution Camera
for fast scene selection and compelling
auto-rectified photo overlays;
Dual-Axis Level Compensator for
survey-grade traversing and stakeout
Advanced Timing Electronics
integrated with a patented microchip
laser to deliver accurate, low-noise
distance measurements
www.sunvision.in
www.sunvision.in
SUNVISION TECHNOLOGY
PVT LTD
www.sunvision.in

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3D Laser scanning

  • 2.  Lidar = Light Detection And Ranging  Laser scanning techniques give: -geometry -intensity -phase of reflected wave train -cooler www.sunvision.in 3D Laser Scanning
  • 3. ‱ There are two primary types of 3D Laser Scanning: time-of-flight scanners and phase-shift scanners. ‱ Time-of-flight laser scanners emit a pulse of laser light that is reflected off the scanned object. A sensor measures the time of flight for the optical pulse to travel to and from the reflected surface. The distance the pulse traveled is then calculated using the following equation: Distance = (Speed of Light * Time of Flight)/2 www.sunvision.in
  • 4. ‱ In phase-shift scanners, a laser beam with sinusoid ally modulated optical power is emitted and reflected off an object. The reflected light is then detected and compared with the emitted light to determine the phase shift. The time of flight can then be determined from the following equation: Time of Flight = Phase Shift / (2* Modulation Frequency). ‱ The values calculated are then substituted in to the first equation to find the distance.
  • 5. Very-High Speed Time-of-flight Pulsed Laser, excellent range and capable of single point surveying; Integrated High-Resolution Camera for fast scene selection and compelling auto-rectified photo overlays; Dual-Axis Level Compensator for survey-grade traversing and stakeout Advanced Timing Electronics integrated with a patented microchip laser to deliver accurate, low-noise distance measurements
  • 6.