Field Of View (Fov); Scanning; Ambient Conditions - Leica BLK360 User Manual

4.3.2
Imaging - field of view
4.4
4.4.1
Unfavourable sur-
faces for scanning
Unfavourable weather
conditions for scan-
ning
Temperature changes
during scanning
Dirt or dust on the
laser shield
24

Field of View (FoV)

NEW ILLUSTRATION
90°
360°
0°
30°
014256_001
a Vertical field of view: 270°
b Horizontal field of view: 360°

Scanning

Ambient Conditions

Highly reflective (polished metal, gloss paint)
•
Highly absorbent (black)
•
Translucent (clear glass)
•
Colour, powder or tape these surfaces before scanning if necessary.
☞
It is not possible to scan if the laser shield is exposed to rain, snow or
•
fog. To scan in these conditions, position the scanner, for example, under
a roof.
Be aware, that rain, snow or fog may adversely affect measurement qual-
•
ity. Always use care when scanning in these conditions.
Surfaces that are directly illuminated by the sun cause an increased range
•
noise and therefore a larger measurement uncertainty.
If some objects are scanned against the sunlight or a bright spotlight, the
•
optical receiver of the instrument can be dazzled so heavily that in this
area no measured data is recorded.
If the instrument is brought from a cold environment, for example from stor-
age, into a warm and humid environment, the interior optics can condense.
This may cause measurement errors.
Avoid rapid temperature changes and give the instrument 15 to 20
☞
minutes time to acclimatise.
The scan mirror is protected against direct contact with a laser shield. Dirt
on the laser shield such as a layer of dust, condensation or fingerprints may
cause considerable measuring errors. Refer to
a
0°
b
360°
30°
Cleaning and Drying.
Operation