polarizing filter

[bigpepperlo]

Martin!
you did not try to use a polarizing filter on top of the IR with the Pockels effect? It is well suppresses any change of brightness and glare.

[Martin]

Interesting idea, need to read up more on the Pockels effect.

I've played around with a normal polarizing filter, with the appropriate orientation it's fairly effective at reducing environmental glare but there is a significant loss in output. It also adds cost and increased opto-mechanical design complexity. Same goes for lasers with diffuser.

[bigpepperlo]

Yes!
However, you can sell this filter as an addition to the device - removable pad on the surface of the IR.

[bigpepperlo]

Martin! see
P.S. http://news.mit.edu/2015/algorithms-boo ... times-1201