Best material to absorb 940nm IR
Best material to absorb 940nm IR
(OP)
Attempting to find a material, paint etc. best suited to absorb Infrared around the 940nm wavelegnth. Source is from commonly available IR LED used for all types of transmiters.
Cheers
Eric
Cheers
Eric





RE: Best material to absorb 940nm IR
What is your requirement?
TTFN
RE: Best material to absorb 940nm IR
Cheers
Eric
RE: Best material to absorb 940nm IR
Your choice of the word fins is a little disturbing. Are you refering to baffles that are perpendicular to the primary line of sight of the detector? If not, there are almost no materials that are not somewhat specular at shallow grazing angles.
You need to determine the field of view that you need or want and the apply baffles appropriately.
TTFN
RE: Best material to absorb 940nm IR
My concern was the baffles may have significant contribution to reflectance of marginally (fractions of a degreee) off-axis signals but as you say glancing signals will always have some reflectance on a treated surface.
On another note, is there a "high Intensity" version of the commonly used 940nm LED's used for all kinds of RC electronics like television and VCR/DVD remotes?
Cheers
Eric
RE: Best material to absorb 940nm IR
TTFN