These products are known as near infrared cut-on filters or long wavelength band-pass filters.  They are designed to block UV and visible light while transmitting NIR light.

Epolin offers dye powders and thermoplastic compounds with Visible Opaque properties.

• Epolight Visible Opaque dyes for thermoplastic compounding

• Epolight Visible Opaque dyes for solvent based systems

• Luminate Visible Opaque ready-to-mold compounds

Explore the difference between the visible and and near infrared spectrum by clicking below.