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2.4 Repeatability
The repeat accuracy of TFmini-S is directly related to the Strength value measured and the output
frame rate (Frequence). The ranging repeat accuracy is characterized by the standard deviation of
ranging. When the frame rate is 100 Hz, the standard deviation of ranging is as follows under the
background of 90% transmittance:
Table 2 Statistics: the standard deviation of TFmini-S at 100Hz and 90% reflectivity
2.5 Distance Measurement Characteristics
With optimization of light path and algorithm, TFmini-S 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.
The detection blind zone of TFmini-S, 0-10cm, within which the output data is unreliable.
The operating range of TFmini-S detecting black target with 10% reflectivity, 0.1-7m.
The operating range of TFmini-S detecting white target with 90% reflectivity, 0.1-12m.
The diameter of light spot depends on the FOV of TFmini-S (the term of FOV generally refers to the
smaller value between the receiving angle and the transmitting angle), which is calculated as follows:
d = 2 ∗ D ∙ tanβ
In the formula above, d is the diameter of light spot; D is detecting range; β is the the value of the
half receiving angle of TFmini-S, 1°. 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
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General
Weight and Dimensions
