The MidOpt AC900-40.5 is a stock IR Pass/Visible Block acrylic sheet that blocks a large portion of the near-IR spectrum. Both surfaces are hard-coated for scratch resistance. It is ideal for use with 940nm LED illumination or in other semi-covert situations where visible light emitted by arc/flash lamps needs to be blocked while IR illumination is passed. AC900 material is custom cut from a 2mm thick sheet material according to customer specifications and is supplied with protective overlays on both surfaces. Other thicknesses are available on request. *Not available in 1mm thickness or standard 25.4™ C-Mount option. For filters thicker than 1mm, we offer an alternative mounting solution that has an overall thickness of 5.5mm. This mount can accommodate filters up to 3.5mm thick.All MidOpt filters can also be purchased unmounted and in custom dimensions upon request from Machine Vision Direct. Technical Specifications Specifications + Useful Range Min 930 nm Useful Range Max 1100 nm Stabledge Yes Secondary Useful Range Min 930 nm Secondary Useful Range Max 1100 nm Third Useful Range Min 930 nm Third Useful Range Max 1100 nm Adhesive Backed Yes Tolerance 10 % Peak Transmission ≤ 90 % Surface Quality (Scratch-Dig) 80-50 Substrate Material Acrylic Filter Diameter M40.5 x P0.5 Product Availability + Standard Lead Time 15 Days Stock Location Built to Order Product Lifecycle Active