Polytec PDV-100 - Optics Specifications; Visibility Maxima Data

7-5
7 Technical Specifications
7.2.3 Optics
Laser
7.2.4 Table of the Visibility Maxima
Laser type: helium neon
Wavelength: 633nm
Cavity length: 138mm
Laser class: 2
Laser output power: typ. 0.6 mW
Stand-off distance
1
1
Measured from the front edge of the retaining ring for the front lens refer to SECTION 7.2.5
[m]
0.1...ca.30
2
2
The maximum stand-off distance depends on the surface properties of the object.
Aperture diameter (1 /e²) [mm] typ. 6.5
Spot size (typ.) [μm]
@ 234mm 30
@ 1m 124
@ 2m 250
@ 3m 370
@ 5m 616
@ each additional meter plus 130
Depth of focus
3
(2m distance)
3
Max. 3dB loss of signal of the optimum
[mm] 210
Visibility maxima
1
[mm]
96 + n · 138
4
4
n = 0; 1; 2;...
Visibility maxima (in mm)
96 1 200 2304 3408 4 512 5616
234 1338 2442 3546 4 650 5754
372 1476 2580 3684 4 788 5892
510 1614 2718 3822 4 926 6030
648 1752 2856 3960 5 064 6168
786 1890 2994 4098 5 202 6306
924 2028 3132 4236 5 340 6444
1062 2166 3270 4374 5478 ...