Tele-15 reflectivity score relative to min. distance?

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Author: joostm | Time: 2021-11-29 20:08:12 | Autonomous driving|
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Posted on 2021-11-29 20:08:12| All floors |Read mode
We have been testing the tele-15 and have another question.
We use a 3M retroreflective jacket as a reference object. This jacket reflects very brightly with a flashlight from a distance of 0 to a long way.
However, when you measure this jacket with the Tele-15 the retroreflectivity starts at about 150. The retroreflectivity starts to increase to 250 at about 17-20 meters. This is what we expect. Is this 17-20 meters a sort of minimum distance for the Tele-15 to work accurately?
Thank you.
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 Author| Posted on 2021-11-29 20:16:25| All floors
25 meter


VS
15 meters
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Posted on 2021-11-29 21:57:01| All floors

There will be some deviations when measuring reflectivity with long-distance lidar.
Tele-15 has a longer range, and its reflectivity is calibrated based on the 20m standard. Generall, the reflectivity measured at 20m is the most accurate.
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 Author| Posted on 2021-11-29 23:40:34| All floors
Livox Support Posted at 2021-11-29 21:57
There will be some deviations when measuring reflectivity with long-distance lidar.
Tele-15 has a ...

Thank you for the quick reply! clear answer. Is the 0-255 score livox specific or is this used in the industry in general?
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Posted on 2021-11-30 10:58:07| All floors
joostm Posted at 2021-11-29 23:40
Thank you for the quick reply! clear answer. Is the 0-255 score livox specific or is this used in  ...

The reflectivity 0-255 is livox specific. 0 to 155 corresponds to the reflectivity within the range of 0 to 100% in the Lambertian reflection model. 151 to 255 corresponds to the reflectivity of target object with retroflection properties.
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 Author| Posted on 2021-11-30 18:31:49| All floors
Last edited by joostm In 2021-11-30 18:33 Editor
Livox Support Posted at 2021-11-30 10:58
The reflectivity 0-255 is livox specific. 0 to 155 corresponds to the reflectivity within the rang ...

Why is there an overlap between 151 and 155? What does this overlap signify?
How do you differentiate between the lambertian range (0-155) and the reflection property range (151-255)?
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Posted on 2021-11-30 18:47:49| All floors
joostm Posted at 2021-11-30 18:31
Why is there an overlap between 151 and 155? What does this overlap signify?
How do you differenti ...

Oh, I'm sorry typed a wrong number.  0 to 150 corresponds the Lambertian. 151 to 255 corresponds to the reflectivity of target object with retroflection properties. And, Lambertian and the reflection properties are distinguished by optical analysis.

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 Author| Posted on 2021-11-30 20:45:27| All floors
Livox Support Posted at 2021-11-30 18:47
Oh, I'm sorry typed a wrong number. 155 to 255 corresponds to the reflectivity of target object wi ...

No problem. But on the https://www.livoxtech.com/tele-15/faq on the livoxtech website states >>

0-155 corresponds to reflectivity within the range of 0-100% in the Lambertian reflection model. 151-255 corresponds to the reflectivity of target objects with Retroflection properties.


So that should be 155-255?
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Posted on 2021-12-1 15:49:15| All floors
0 to 150 corresponds the Lambertian, 151 to 255 corresponds to the reflectivity of target object with retroflection properties.
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 Author| Posted on 2021-12-2 23:03:59| All floors
just to double check, you mean your previous comment is false:

Livox Support Posted at 2021-11-30 18:47
Oh, I'm sorry typed a wrong number. 155 to 255 corresponds to the reflectivity of target object wi ...
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