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