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specified
itionally
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iment is
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eight is
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en from
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/alues 1s
rror may
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atmospheric impact, etc. In addition, the divergence
angles in horizontal and vertical directions are almost the
same.
OBI: QNNM 8.28581 MM
Hanae. 8
14398. 03 tm
Length of footprint
Figure 10. Simulated footprint at a flying height of 300 m
above local average elevation
5. MANUFACTURES
The laser emitting device is manufactured by Zhenhong
LLC at Dongkuan, Guangdong, China. With the designed
parameters by our theoretic analysis, 3D-Tool software
is used for the visualization of laser emitting device, as
shown in Figure 11. 3D-Tool is a powerful, cost effective
tool that has helped customers substantially in the
management of manufacturing technologically advanced
products. 3D-Tool allows to see, evaluate, measure,
cross section.
The emitting laser component consists of basis, front and
rear cushion, ring, tube, polysulfone sets, septa, diode
laser, as depicted in Figure 11. Terms are as follows.
al: base for rear lens
a2: base for front lens
a3: isolation piece for separating front and real lens
a4: flatting pieces for stabling the front lens
a5: screw tube for installing and stabling polysulfone
a6: polysulfone for stabling laser diode
bl: cushion (base)
cl: lock ring for stabling tube
dl: laser diode
el: emitting tube with two lens, front lens and rear
lens inside
6. CONCLUSION
This paper presents the advances of the flash LiDAR
initative with focus on light-emitting system. The
proposed flash LiDAR is imaged with the 3D imaging
mode, and the entire scene within the sensor's field of
view (FOV) at a single flash of the laser. This is because
the proposed flash LIDAR have many advantages such as
inherently insensitive to ambient and stray light, and the
glint and clutter outside of the expected range to the
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B3, 2012
XXII ISPRS Congress, 25 August - 01 September 2012, Melbourne, Australia
target filtered and discarded. Since the flash LiDAR
captures a complete image with each flash. This
capability makes data pre-processing and post-processing
extremely efficient and reliable since range, bearing, and
pose algorithms do not have to deal with interpreting data
from glint and clutter. Rapid frame rates, waveband
filtering, and time gating on the return signal increase
glint tolerance even further. Thus these advantages will
bring significant improvement for its application in the
traditional fields such as topographic mapping and
disaster monitoring.
This paper only reports a pre-mature of flash LiDAR
technology. Extensive and on-going investigation and
investments for a prototypes of flash LiDAR system is
under development. The system will be tested in the
laboratory and in-flight airplane and helicopter in field
tests.
ACKNOWLEDGEMENTS
This paper is financially supported by GuangXi Governor
Grant under approval number of 2010-169, China Natural
Science Foundation under contract number 41162011, GuangXi
Grand Natural Science Foundation under contract number,
2011GXNSFD018001, GuangXi Grand Natural Science
Foundation under the number of 2012GXNSFCB053005, and
the grant of the GuangXi Key Laboratory of Spatial
Information and Geomatics under contract number,
GuiKeNeng110-31-08-01. The authors would thank those
who gave us their hands in experimental design and
technical advice.
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