Manual

SJ-PM-TFmini Plus-T-01 A04 Benewake (Beijing) Co. Ltd.
Page9
2.5 Distance Measurement Characteristics
With optimization of light path and algorithm, TFmini Plus has minimized influence from external
environment on distance measurement performance. Despite that, the range of distance measurement may
still be affected by the environment illumination intensity and the reflectivity of detection object. As shown
in Figure 2:
① Represents the detection blind zone of TFmini Plus, 0-10cm, within which the output data is unreliable.
② Represents the operating range of TFmini Plus detecting black target with 10% reflectivity, 0.1-5m.
③ Represents the operating range of TFmini Plus detecting white target with 90% reflectivity, 0.1-12m.
Vertical Coordinates: Represents the radius of light spot for TFmini Plus at the different distances. The
diameter of light spot depends on the FOV of TFmini Plus (the term of FOV generally refers to the smaller
value between the receiving angle and the transmitting angle), which is calculated as follows:
dD∙tanβ
In the formula above, d is the diameter of light spot; D is detecting range; β is the the value of the
receiving angle of TFmini Plus, 3.6°. Correspondence between the diameter of light spot and detecting
range is given in Table 3.
Table 3 the Minimum side length of effective detection corresponding to Detecting Range
Detecting
range
1m 2m 3m 4m 5m 6m 7m 8m 9m 10m 11m 12m
Minimum
side length
6cm 12cm 18cm 24cm 30cm 36cm 42cm 48cm 54cm 60cm 66cm 72cm
Figure 2 Schematics of Range of distance measurement and Effectiveness of the Product
Figure 2 Schematic diagram of size of light spot