Polytec PSV-500 User Manual

7-12
7 Technical Specifications
7.5.2 Optics
Figure 7.2: Depth of focus subject to the stand-off distance
Focal length (nominal): 70mm
Minimum stand-off distance: 125mm
Stand-off distance
1
1
Measured from the front of the scanning head
Spot diameter
(1/e
2
, typ.)
Depth of focus
(typ.)
2
2
For 3dB signal reduction
Aperture diameter
3
3
At the front of the scanning head
[mm] [µm] [mm] [mm]
141 25 0.48 5.8
345 43 1.4 8.4
549 60 2.8 9.4
753 78 4.6 10
1000 98 7.5 10.4
With each additional meter stand-off distance 85µm are added to the spot diameter.

Polytec PSV-500 Specifications

General

Brand	Polytec
Model	PSV-500
Category	Measuring Instruments
Language	English