Originally Posted By: SkyPupThe 850nm IR filter is not quite ready for prime time.
Although it does eliminate the red glow from the IR LED, it also eliminates approximately 50% of the IR beam strength. So will have to try some lower range IR filters around 800-820nm.
It is going to be somewhat of a trade off though, either less red glow or less IR beam strength....
No magic, if it gets thru you will see it unless its over 980nm. Best to use only the lowest amount of ir needed to do the job, low power is less visible.
2 Polarized lenses will work to have a variable output beam.
With both filters lined up almost 100% light transmission. When one is rotated it will start blocking the light, when you get to 90 degrees it will be blocking 95%+ of the light. Works with visible light have not had time to try with ir light, do not get the circular polarized filters. Linear polarized filters are what I have tried.
Here is a link to explain the physics of what is happening.
light notes
It's all in the physics, from loading the ammo, building the suppressor, choosing the spectrum of light to observe, to eating the pork tenderloin ( which opens up the physics of redneck BBQ science, which some have perfected judging by the size of the cooks, larger is better)