High Precision Laser Scanning of Metallic Surfaces
Table 1
Properties of scanner system and its components.
Characteristics
IS1
IS2
Pixel size of camera
∂d
3.2 μm
10 μm
Resolution of lens
100 lp/mm
40 lp/mm
Optical amplification
M
0.4475
1
Depth Of Field
DOF
±1.2 mm
Number of rows for detector
NR
1536
576
Number of columns for detector
NC
2048
768
Distance from projection point in camera lens to surface
S
162 mm
—
Camera working distance
WDC
—
110 mm
Height from reference plane to projection point in lens
H
140.2 mm
Focal length of lens
f
50 mm
—
Dynamic range of camera
DR
60 dB
120 dB
Step size in scanning dimension
stepS
8.33 µm
Angle of camera view
β
60 degrees
Width of laser line
lw
25 μm
Spectral wavelength of laser
λ
660 nm
Laser working distance
WDL
120 mm
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