The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part Bl. Beijing 2008 
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Figure 9. Test of environmental conditions 
Figure 8. Test of influence of surface reflectivity 
(3) Test of influence of surface reflectivity 
While we captured 3D data of our researching room, we found 
that the data of black chairs is entire. So we used the portable 
3D laser scanner to scan a black car, the 3D point cloud data of 
the black car is very good (Figure 8(a)). The portable 3D laser 
scanner can measure black objects, and it is easy applied to 
measure terrains coal piles. We used it to acquire the 3D data of 
the coal piles in Tianjin Huanghua, built 3D model of the coal 
piles, gave the profile maps of the coal piles, and compute the 
volumes of the coal piles, just like figure 8(b)-8(c). 
(4) Test of environmental conditions 
Lasers operate in a very limited frequency band. Therefore 
filters can be applied in the receiving unit allowing only this 
frequency to reach the receiver resp. the camera. If the radiation 
of the illumination source (sunlight, lamps) is strong as 
compared to the signal, enough of this ambient radiation will 
pass the filter and influence the accuracy or prevent any 
measurements at all[Boehler, w., 2003]. We employed a glass 
plate with the black and white chessboards to test the influence 
of environmental conditions. To prevent from the interference 
of environment, we put the glass plate on the playground. We 
found that dust is present lead to the edge blur (figure 10(a)). 
We also found that the angle between the laser beam and the 
light lines of sun is to effect on the scanned data, while the 
angle is closer to 0°, the scanned data is very bad (figure 10(b)), 
while the angle is more than 90°, there is a little negative 
influence on the scanned data (figure 10(c)), and the angle less 
than 90° is the most ideal (figure 10(d)). Figure 10(e)-(h) are the 
corresponding photos described above. 
6. CONCLUSIONS 
We developed a 360° continuous scanning, portable 3D laser 
scanner, which can be applied to many fields, such as city 
planning, industrial survey, virtual reality, and digital 
preservation of cultural heritage. The comparison of its all 
Technical data with those of foreign 3D laser scanner is shown 
in Table 1. It shows technical data of our 3D laser scanner 
(AX200) reaches these of foreign products of this kind. In 
addition, it has the advantages of small volume and low weight 
about only 6 kg, so it is easy to take, and it only costs about one 
fifth of the price of the foreign commercial 3D laser scanner.