A-7
A Optional Accessories
Zoom Lens
A.3 PSV-A-HNeBF Block Filter (Only for PSV-500 Standard)
If the intensity of the laser light is too high the supplied helium-neon block
filter should be mounted additionally. The block filter is screwed directly on the
video camera aperture of the scanning head and reduces the intensity of the
laser light back scattered to the video camera by 98%.
A.4 PSV-A-526 Protective Window
A.4.1
Introduction
The protective window covers the laser beam exit as well as the aperture of
the video camera on the scanning head. Furthermore the protective window
dampens the acoustic excitation of the scanner mirrors.
Metrological
limitations
The protective window is not suitable for default use, because the use entail
the following limitations:
•
In the case of perpendicularly incidence of the laser beam to the
protective window, the direct reflection of the protective window is
mirrored to the detector of the vibrometer. Instead of the object under
investigation, the vibration of the protective window is measured.
•
The disturbed scan range depends on the focused stand-off distance. At a
stand-off distance with less than 1 m, because of the direct reflection a
centralized scan range of up to ±3° must be precluded from the
measurement. For measurements with a stand-off distance of more than
1 m, the disturbed scan range is limited to
≤
±1°. In this disturbed scan
range, it is possible that also the autofocus is not working properly.
•
Geometry measurements are not possible with mounted protective
window.
•
The scan area is limited to ±15°.
•
When using the wide angle setting of the video camera a shading of the
video image on the right edge occurs. The specified scan range of ±15° is
visible in all stand-off distances on the video image.
•
Depending on the scanning angle of the laser beam, a lateral
displacement of the beam occurs. This can be widely compensated by
carrying out the alignment with the mounted protective window.
Lens:
F 2.5/f = 8.5 ... 90 mm, (zoom, focus, iris; manually
adjustable)
Angle of view (horizontal):
@ wide end:
approx. 28°
@ tele end:
approx. 2.8°
Stand-off distance with close-
up lens:
approx. 180 mm … 300 mm
Stand-off distance without
close-up lens:
approx. 300 mm …infinite
Weight:
504 g (with PSV-A-455 helium-neon block filter)
Dimensions (w x h x d):
66 mm x 68 mm x 148 mm (with PSV-A-455 helium-
neon block filter)
Содержание PSV-500-3D
Страница 19: ...2 4 2 Introduction ...
Страница 55: ...4 10 4 Measuring ...
Страница 63: ...6 6 6 Troubleshooting ...
Страница 97: ...A 12 A Optional Accessories ...
Страница 101: ...C 2 C Declaration of Conformity ...