Hi, all,
I need some ND filters for a stabilized laser product I'm designing. Ideally it would be about 5 mm in size and less than 1 mm thick.
The fallback position is to use a polarizer, which I can get in that size, but I'd far prefer to pick a density and stick to it.
Oh, and it needs to be stable to ~10 ppm at 70 C over time scales of hours.
Any bright ideas?
Thanks
Phil Hobbs