Is it possible to set minimum detectable range? VL53L0X

Roman K_2 · ‎2018-04-30

Posted on April 30, 2018 at 23:44

Hi,

Is it possible to set minimum detectable range for VL53L0X? I have an application with some parasitic reflections in 10cm zone which I want to ignore. Is it possible to set the detectable range for VL53L0X?

John E KVAM · ‎2018-05-07

Posted on May 08, 2018 at 01:21

The VL53L0X sensor averages ALL the photons it gets back. In fact the crosstalk calibration step is a method of accounting for those unwanted photons. One way to ignore the wrong stuff is to increase the brightness of the right stuff.

A bit of 3M reflective tape on your target would be so bright that the other photons would be an extremely small component of your average. Can you do that?

The only other thing I can think of is to over-calibrate the crosstalk. But if the parasitic reflections are not consistent, that wont work.

Take a look at:

https://www.youtube.com/watch?v=BHM2CZVXZGc

Perhaps by designing a coverglass like this you can get around the issue.

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