MidOpt - SP651 Near-Ultraviolet (UV) / Visible (VIS) / Near-Infrared (IR) / Mid-Red Dichroic Block Shortpass Filter

The MidOpt SP651 Near-Ultraviolet (UV) / Visible (VIS) / Near-Infrared (IR) Mid-Red Dichroic Block Shortpass Filter passes near-UV and VIS light from 350-645nm while blocking near-IR (NIR) light from 650-1050nm. It also blocks UV transmission below 350nm. CCD/CMOS imagers that need to pass near-UV and VIS wavelengths can use the SP651 to block NIR light while preventing a reddish, washed-out color in the final image. Used at normal incidence, these filters can also be placed in front of some UV-transmitting arc lamps to limit the amount of NIR radiation (heat) that may damage a subject under illumination. Although the SP651 substrate is bubble-free, UV-grade fused silica, additional mechanical cooling of the area around this hot mirror may be important (depending on the lamp wattage being used). MidOpt Shortpass Filters have a broad, Gaussian passband to mimic and accommodate the entire output of the most common LED wavelengths and are anti-reflection (AR) coated to limit glare and minimize reflection loss.