SWIR Filters to Address the 700nm-2,000nm Imaging Range
The same types of Bandpass, Longpass, and Polarization techniques that control visible light are available to control SWIR (Short-Wave Infrared) Lighting. Bandpass and Longpass filters pass a specific range of wavelengths in the 700nm-2,000nm range. The Neutral Density and SWIR Polarizing Filters work in the 400nm-2,000nm range.
SWIR polarizing film is available as mounted glass filters and in cuttable sheets with and without adhesive backing, with sheet sizes from 2-inch X 2-inch to 10-inch X 3.45-inch. You may be using near-IR LEDs, but glare exists in the near-IR too and standard polarizers won’t work.