So my current project uses VL53L4CD time of flight sensor and I want a lens to keep the shmoo off of it. I tried this IR transparent film but it still blocks the sensor.
Most IR pass through filters are for 890-900nm not 940.
I ran into this issue myself for a slightly different use case.
The thing I found worked surprisingly well was a scrap piece of car window tint. I literally just walked into a local shop and asked for a small piece of scrap.
My circa 2016 DIY attempt at an equivalent of TrackIR used a piece of floppy disk media as IR filter for a PS3eye camera (I used 850nm LEDs tho) .
More current howto linked to filters at aliexpress, and they have all sorts of ir filters in 940nm, for things that look like the super cheap IR backup cameras. Maybe a dirt cheap backup camera housing+filter could work…
Also, that old wiimote might have new purpose. Look at step 7 here.
Most IR pass through filters are for 890-900nm not 940.
I ran into this issue myself for a slightly different use case.
The thing I found worked surprisingly well was a scrap piece of car window tint. I literally just walked into a local shop and asked for a small piece of scrap.
My circa 2016 DIY attempt at an equivalent of TrackIR used a piece of floppy disk media as IR filter for a PS3eye camera (I used 850nm LEDs tho) .
More current howto linked to filters at aliexpress, and they have all sorts of ir filters in 940nm, for things that look like the super cheap IR backup cameras. Maybe a dirt cheap backup camera housing+filter could work…
Also, that old wiimote might have new purpose. Look at step 7 here.