We have a cover window that is a few cms away from the sensor.

[John E KVAM]

NCao Writes:

"We have a cover window that is a few cms away from the sensor. What kind of calibration would make the sensor ignore it?"

[John E KVAM · Accepted solution]

there are 3 ways to make your life difficult:

1) use a coverglass that is not very transparent

2) use a thick, roughly textured coverglass

3) use a large air gap between the sensor and the glass.

And all three of these are cumulative.

The best solution for a large air gap is to create an opaque gasket. It will let the light out of the Tx side, and let the light back in the Rx side without letting much light short-circuit and create crosstalk. Rubber (actually carbon infused latex) makes a great gasket.

there is a good article at the top of Time-of-Flight Q&A page. Give that a read. Watch the video referenced in the article and you will get a good idea of what to do.

https://community.st.com/s/article/Time-of-Flight-Cover-glass