Hi @bartptak ,
Do you mean only the 940, without any visible light? You'd need to use "visible light filter", that only blocks visible light. I have used this in this blog post:
https://discuss.luxonis.com/blog/5206-ndvi-drone-with-sam2-segmentation
I think this is the filter I used:
https://www.amazon.de/-/en/Infrared-Filter-850-Digital-Pass/dp/B0815532QC?crid=11K2NM22XMSLG&keywords=optischer+filter+infrarot&qid=1678794620&sprefix=optischer+filter+infrarot%2Caps%2C109&sr=8-12
From their description:
The IR850 brand infrared filter blocks all visible light up to 850 nm. However, infrared rays are allowed through.
Best, Erik